Engine - Repair (n52) BMW Z4 E89

00 Danger of poisoning if oil is ingested/absorbed through the skin

Danger of poisoning!

Ingesting oil or absorbing through the skin may cause poisoning!

Possible symptoms are

1. Headaches
2. Dizziness
3. Stomach aches
4. Vomiting
5. Diarrhoea
6. Cramps/fits
7. Unconsciousness

Protective measures/rules of conduct

1. Pour oil only into appropriately marked containers
2. Do not pour oil into drinking vessels (drinks bottles, glasses, cups or mugs)
3. Observe country-specific safety regulations

First aid measures

1. Do not induce vomiting. If the person affected is still conscious, he/she must rinse out their mouth with water, drink plenty of water and consult a doctor immediately. If the person affected is unconscious, do not administer anything by mouth, place the person in the recovery position and seek immediate medical attention.

Engine identification

Punch engine numbers at marked surface with number punch.

Magnesium crankcase with sticker

M47/M47TU/M47T2

Scheme 504

M57/M57TU/M57T2

Scheme 505

M67/M67TU

Scheme 506

N47/N47S/N47C/N57 N57S

Scheme 507

M52/M52TU

Scheme 508

M54

Scheme 509

M56

Scheme 510

N40/N45/N45T/N43

Scheme 511

N42/N46/N46T

Scheme 512

N51/N52/N52K/N52T/N53/N54/N55

Scheme 513

N62/N62TU

Scheme 514

N73

Scheme 515

S54

Scheme 516

S85/S65

Scheme 517

W10/W11

Scheme 518

N12/N14/N16/N18

Scheme 519

W17

Scheme 520

Assemble engine.

11 00... Engine oil service (N52K)

Recycling

Catch and dispose of drained engine oil in a suitable container.

Observe country-specific waste-disposal regulations.

Release oil filter cap with special tool 11 9 240 .

Tightening torque 11 42 1AZ .

Note. Engine oil flows out of the oil filter housing and back into the oil sump.

Scheme 521

Note. Presentation: E63 without underbody protection.

Unclip service opening on underbody protection.

Remove screw plug (1) from oil sump and drain engine oil.

Tightening torque 11 13 1AZ .

Installation

Replace sealing ring.

Scheme 522

Remove and insert oil filter element (1) in direction of arrow.

Installation

Replace oil filter element (1) and sealing rings (2).

Note. Moisten sealing rings (2) with engine oil.

Scheme 523

Secure oil filter cap with special tool 11 9 240 .

Tightening torque 11 42 1AZ .

Note. Pour in ENGINE OIL .

Start engine and run at idle until oil pressure warning lamp goes out.

Turn off engine.

Check oil filter cap and screw plug on oil sump for leaks.

Assemble engine.

Checking engine oil level

1. Park vehicle on a horizontal surface
2. Allow engine at normal operating temperature to run for three minutes with increased revs (approx. 1100 RPM)
3. Read off engine oil level in instrument cluster or on Control Display
4. Top up engine oil if necessary

Mounting engine on assembly stand (N52K)

Necessary preliminary tasks

1. Remove engine

Bolt engine or engine block with steel bolts (1) and aluminum bolts (2) to special tool 11 4 440 .

To release central bolt, bolt on special tools 11 9 261 and 11 9 265 as well.

Mount engine with special tool 11 3 370 to special tool 00 1 450.

Scheme 524

1.0 Sealing compound for injection

SEALING COMPOUND INJECTION REFERENCE CHART

2.0 Sealing compound for application

SEALING COMPOUND APPLICATION REFERENCE CHART

3.0 Cleaning agent

CLEANING AGENT REFERENCE CHART

4.0 Lubricant for application

LUBRICANT REFERENCE CHART

5.0 Lubricants to loosen locked screw connections

LUBRICANTS REFERENCE CHART

11 00 050 Removing and installing engine (N52K)

Necessary preliminary tasks

1. Disconnect «BATTERY NEGATIVE LEAD»(/bmw/z4/e89-2009-2013/remont/horns/#general-electrical-system-repair__61-20-900-disconnecting-and-connecting)
2. Move «ENGINE HOOD/BONNET»(ref-381258-S39331041492010122800000) into service position
3. Remove «INTAKE FILTER HOUSING»(/bmw/z4/e89-2009-2013/remont/fuel-system/#fuel-system-repair-n52__13-71-000-removing-and-installingreplacing)
4. Remove «FAN COWL»(/bmw/z4/e89-2009-2013/remont/cooling-system-mechanical/#cooling-system-repair-n52__17-11-035-removing-and-installingreplacing) with electric fan
5. Remove «RADIATOR»(/bmw/z4/e89-2009-2013/remont/cooling-system-mechanical/#cooling-system-repair-n52__17-11-000-removing-and-installing)
6. Remove «CONDENSER»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-53-551-removing-and-installing)
7. Detach all coolant hoses from engine
8. Detach vacuum line from brake booster
9. Release engine wiring harness from electronics box and lay to one side
10. Remove «EXHAUST SYSTEM»(/bmw/z4/e89-2009-2013/remont/exhaust/#exhaust-system-repair-n52__18-00-020-removing-and-installing)
11. Remove transmission See «2300017 REMOVING AND INSTALLING TRANSMISSION (GS6-17BG) N52K»(/bmw/z4/e89-2009-2013/remont/manual-trans/#manual-transmission-repair-n52__23-00-017-removing-and-installing) or «2400030 REMOVING AND INSTALLING AUTOMATIC TRANSMISSION (6HP19Z) N52K»(/bmw/z4/e89-2009-2013/remont/automatic-trans/#automatic-transmission-repair-n52__24-00-030-removing-and-installing)
12. Release «STEERING SPINDLE»(/bmw/z4/e89-2009-2013/remont/manual-power-steering/#steering-and-wheel-alignment-repair__32-31-070-removing-and-installingreplacing) from steering gear (do not remove)
13. Release grounding strap on left engine support arm

Release nut (1) and disconnect battery positive lead (2) from terminal.

Scheme 525

Release screw (1) and remove A/C line (2) from A/C compressor.

Installation

Replace seals.

Tightening torque 64 52 1AZ .

Scheme 526

Disconnect fuel lines (1).

Seal off fuel lines with special tools 13 5 161 and 13 5 162.

Disconnect tank vent line (2).

Scheme 527

Unlock crankcase breather hose (2) and detach from cylinder head cover (1).

Scheme 528

Release nut (1) on engine mount on left and right.

Installation

Replace self-locking nut.

Tightening torque 22 11 2AZ .

Scheme 529

Screw towing eye (1) into cylinder head.

Tightening torque 11 12 9AZ .

Suspend special tool 11 0 020 from engine crane.

Suspend special tool 11 0 020 from the designated mounting eyelets (2) only.

Lift engine out with engine crane.

Note. For purposes of clarity, engine removed and not showing intake manifold.

Scheme 530

Installation

Secure special tool (1) 11 7 310 on steering gear.

Remove again before securing transmission carrier.

Scheme 531

Assemble engine.

Check function of DME.

11 00 Removing and installing/replacing acoustic cover (N52K)

Release screws (1).

Raise acoustic cover slightly and remove towards front.

Scheme 532

00 Risk of injury if oil comes into contact with eyes and skin

Danger of injury!

Contact with eyes or skin may result in injury!

Possible symptoms are

1. Impaired sight
2. Irritation of the eyes
3. Reddening of the skin
4. Rough and cracked skin

Protective measures/rules of conduct

1. Wear protective goggles
2. Wear oil-resistant protective gloves
3. Observe country-specific safety regulations

First aid measures

1. Eye contact: Rinse eyes immediately with plenty of water for at least 15 minutes; if available, use an eye-rinsing bottle. If irritation of the eyes persists, consult a doctor.
2. Skin contact: Wash off with soap and water immediately. If irritation persists, consult a doctor.

Note. Do not use solvents/thinners.

00 Safety information for working on vehicles with automatic engine start-stop function (MSA)

Observe safety precautions when working on MSA vehicles

Before carrying out practical work on the engine, always ensure that the MSA functionality is deactivated so as to prevent automatic engine starting while work is being carried out in the engine compartment.

MSA function is deactivated by

1. Deactivate MSA by means of button (1) in passenger compartment
2. Open seat belt buckle and driver's door
3. Open engine bonnet/hood and ensure that engine hood/bonnet contact is not in workshop mode

1. Workshop mode
2. Basic setting (engine hood/bonnet open)

B = 7 mm

To make sure that the engine hood/bonnet contact is at the basic setting, if necessary press the hood/bonnet contact up to the limit position before starting work and slowly release.

Scheme 533

When working with diagnosis tools

1. Observe instructions in diagnosis tool

00 Safety instructions for handling oil

Recycling

Observe country-specific waste-disposal regulations.

Measures if oil is unintentionally released

1. Personal precautionary measures: Danger of slipping! Keep non-involved persons away from the work area. Wear personal protective clothing/equipment.
2. Environmental protection measures: Prevent oil from draining into drain channels, sewerage systems, pits, cellars, water and the ground.
3. Limiting spread: Use oil blocks to prevent the surface spread of oil.
4. Cleaning procedure: Bind and dispose of escaped oil with nonflammable absorbents.

Note. Do not flush oil away with water or aqueous cleaning agents.

11 00 670 Securing engine in installation position (N52)

Necessary preliminary tasks

1. Secure «ENGINE COMPARTMENT LID IN SERVICE POSITION»(ref-381258-S39331041492010122800000)
2. Remove «AIR INTAKE FILTER HOUSING»(/bmw/z4/e89-2009-2013/remont/fuel-system/#fuel-system-repair-n52__13-71-000-removing-and-installingreplacing)

Lever out expanding rivets (2) and remove cable clip (1).

Scheme 534

Unlock and disconnect quick-release coupling (2). Detach vent line from cylinder head cover (1).

Installation

Make sure quick-release coupling is fitted correctly.

Assemble transverse member 00 6 000 with special tools 00 6 030.

Scheme 535

Screw in towing hook (1).

Scheme 536

The support points on the left side are shown.

Scheme 537

Secure special tool 11 0 020 to spindle 00 6 002.

Fit suitable chains to special tool 11 0 020 and attach to engine towing hook or lifting eye.

Scheme 538

Unscrew nuts (1).

Raise engine approx. 10 mm with transverse member.

Installation

Replace self-locking nuts.

Tightening torque 22 11 2AZ .

11 12 729 Checking cylinder head for water leaks (N52K)

Necessary preliminary tasks

1. Remove «CYLINDER HEAD»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-12-100-removing-and-installing)
2. Disassemble «CYLINDER HEAD»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-34-560-replacing-all-valve)

Note. Observe mounting of special tool 11 4 341 on cylinder.

Secure special tool 11 4 341 with bolts 11 4 345 to 25 Nm.

Scheme 539

Install special tool 11 4 341 with special tool 11 4 345.

Installation

Cylinder no. 1 is marked.

Scheme 540

Fit special tool 11 4 342 with bolts (1). Screw in knurled screw in direction of arrow.

Sealing flange must rest flat.

Scheme 541

Secure special tool 11 4 344 with bolts (1).

Note. Compressed air at valve max. 3 bar .

Heat cylinder head to 60 °.

Check for bubble formation in a water bath.

Scheme 542

Assemble engine.

11 12 100 Removing and installing cylinder head (N52K)

Necessary preliminary tasks

1. Remove «EXHAUST SYSTEM»(/bmw/z4/e89-2009-2013/remont/exhaust/#exhaust-system-repair-n52__18-00-020-removing-and-installing)
2. Drain «COOLANT»(/bmw/z4/e89-2009-2013/remont/cooling-system-mechanical/#cooling-system-repair-n52__17-00-008-draining-and-adding)
3. Drain off «ENGINE OIL»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-00-engine-oil-service-n52k)
4. Remove both exhaust manifolds . See «1840060 REMOVING AND INSTALLING/REPLACING REAR EXHAUST MANIFOLD (N52K)»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__18-40-060-removing-and-installingreplacing) or «1840050 REMOVING AND INSTALLING/REPLACING FRONT EXHAUST MANIFOLD (N52K)»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__18-40-050-removing-and-installingreplacing)
5. Remove «INTAKE PLENUM»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-61-050-removing-and-installing)
6. Detach coolant hoses from cylinder head
7. Remove «INTAKE AND EXHAUST CAMSHAFT ADJUSTERS»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-36-046-removing-and-installingreplacing)

Release screws (1).

Unclip timing chain module (2) at junction (3) and remove towards top.

Set down timing chain.

Installation

The timing chain is lifted out with a hook only during assembly.

Scheme 543

Release bolts (2) for eccentric shaft sensor (1).

Remove eccentric shaft sensor (1) towards front.

Scheme 544

Release screw (1).

Remove magnet wheel (2) towards front.

Scheme 545

After removing, place magnet wheel (1) in a plastic bag (2) with a seal.

Scheme 546

Pre-tension eccentric shaft (1) upwards in direction of arrow.

Remove stop screw between 1st and 2nd cylinders.

Tightening torque 11 37 5AZ .

Scheme 547

Note. Bolt (2) can only be released when the timing chain module is pressed forward slightly.

Release screw (2).

Tightening torque 11 12 3AZ .

Release screws (1).

Tightening torque 11 12 4AZ .

Installation

Replace aluminum screws.

Scheme 548

Release cylinder head bolts (1) M10 with special tool 11 8 580 .

Release cylinder head bolts (2) M9 with special tool 11 4 420 .

Note. Picture shows intake and exhaust camshafts removed.

Scheme 549

Undo cylinder head bolts (1 and 3) M9 using special tool 11 4 420 .

Tightening torque 11 12 2AZ .

Release cylinder head bolts (2) M10 with special tool 11 8 580 from outside inwards.

Tightening torque 11 12 1AZ .

Scheme 550

Secure special tool 11 0 320 with existing cylinder head cover bolts (1).

Tightening torque 11 12 5AZ .

Scheme 551

Insert 11 4 430 special tool into bores.

Scheme 552

Remove coarse residues on sealing surfaces with special tool 11 4 471 from cylinder head and crankcase.

Scheme 553

Remove fine residues on sealing surfaces with special tool 11 4 472 from cylinder head and crankcase.

Scheme 554

There must be no fluids or contaminants in any of the threaded holes (1) for the cylinder head bolt connections.

Risk of corrosion and cracking!

Clean all threaded holes.

Replace CYLINDER HEAD GASKET .

Scheme 555

Note. Picture shows intake and exhaust camshafts removed.

Scheme 556

Observe sequence for tightening cylinder head bolts without fail

Installation

1. Jointing torque
2. 1st angle of rotation
3. 2nd angle of rotation
4. 3rd angle of rotation: All cylinder head bolts 1 to 14 to 45°

Insert bolts (1).

Tightening torque 11 12 4AZ .

Insert bolt (2).

Tightening torque 11 12 3AZ .

Installation

Replace aluminum screws.

Assemble engine.

11 12 000 Removing and installing/sealing cylinder head cover (N52K)

Necessary preliminary tasks

1. Remove «IGNITION COILS»(/bmw/z4/e89-2009-2013/remont/gauges-instrument-panels/#engine-electrical-system-repair-n52__12-13-511-replacing-ignition-coils)
2. Release «IGNITION WIRING HARNESS»(/bmw/z4/e89-2009-2013/remont/gauges-instrument-panels/#engine-electrical-system-repair-n52__12-51-100-replacing-wiring-harness) in cylinder head cover area
3. Remove «TENSION STRUT»(/bmw/z4/e89-2009-2013/remont/axle-shafts/#front-axle-repair__51-71-371-removing-and-installingreplacing)

Unlock and detach vent hose (1).

If necessary, pull off metal bracket (2) in direction of arrow.

Release screws (3) on electric servomotor.

Tightening torque 11 37 3AZ .

Note. A further screw, which cannot be seen in the picture, must be released under the electric servomotor (4).

Release screw on electric servomotor.

Tightening torque 11 37 3AZ .

Remove servomotor (4) in direction of arrow.

Scheme 557

If necessary, release nuts (5).

Tightening torque 11 72 1AZ .

If necessary, remove secondary air valve (6).

Release screws in area (1).

Tightening torque 11 12 5AZ .

Installation

Replace aluminum screws.

Release threaded pin (2).

Tightening torque 11 12 5AZ .

Installation

Replace aluminum screws.

Scheme 558

Installation

Slotted sleeves (2) for guiding ignition coils in cylinder head cover (1) must be replaced.

Remove slotted sleeves (2).

Scheme 559

Installation

Clean all sealing faces (1 and 2).

Installation

Replace gaskets (1 and 2).

Scheme 560

Assemble engine.

11 12 101 Replacing cylinder head gasket (N52K)

Necessary preliminary tasks

1. Remove «CYLINDER HEAD»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-12-100-removing-and-installing) .

Insert 11 4 430 special tool into bores.

Remove cylinder head seal.

There must be no fluids or contaminants in any of the threaded holes (1) for the cylinder head bolt connections.

Scheme 561

Cylinder head gasket (3) is a sheet-metal gasket.

Scheme 562

Check adapter sleeves (1) for damage and firm seating.

Place cylinder head gasket (2) in direction of arrow on engine block.

Scheme 563

Note. Check cylinder head for DEVIATION FROM FLATNESS . Check cylinder head for WATER LEAKS .

Assemble engine.

11 12 719 Resurfacing cylinder head sealing face (N52K)

Necessary preliminary tasks

1. Remove «CYLINDER HEAD»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-12-100-removing-and-installing)
2. Remove «EXHAUST CAMSHAFT»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-31-028-removing-and-installingreplacing) .
3. Remove «INTERMEDIATE LEVER»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-37-010-removing-and-installingreplacing) on inlet side

Check evenness of cylinder head sealing faces with a standard straight-edge (1).

Note. Max. deviation from level (longitudinal) 0.10 mm

Scheme 564

Check evenness of cylinder head sealing faces with a standard straight-edge (1).

Note. Max. deviation from level (transversal) 0.05 mm

Scheme 565

Check cylinder head for WATER LEAKS .

Assemble engine.

11 13 000 Removing and installing, sealing or replacing oil sump (N52K)

Necessary preliminary tasks

1. «LOWER FRONT AXLE»(/bmw/z4/e89-2009-2013/remont/axle-shafts/#front-axle-repair__31-11-506-loweringraising-front-axle)
2. Drain and add «ENGINE OIL»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-00-engine-oil-service-n52k)

Release bolts along line (1).

Tightening torque 11 13 5AZ .

Installation

Replace aluminum screws.

If necessary, release nuts (4). Remove oil level sensor.

Tightening torque 11 13 11AZ .

Installation

Replace sealing ring.

Scheme 566

Installation

Replace all seals.

Assemble engine.

11 14 151 Replacing crankshaft radial seal (transmission side) (N52K) up to 12.31.08

Necessary preliminary tasks

1. Remove «TRANSMISSION»(/bmw/z4/e89-2009-2013/remont/manual-trans/#manual-transmission-repair-n52__23-00-017-removing-and-installing)
2. Remove «FLYWHEEL»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-22-500-removing-and-installingreplacing)

Note. Crankshaft radial seal has six removal openings for removal with special tool 11 9 200.

Scheme 567

Note. If necessary, remove rubber coating (1) on top side of crankshaft radial seal and expose a removal opening (2) (see illustration).

Scheme 568

Fit special tool 11 9 200 . Insert sheet metal screws into removal opening of crankshaft radial seal and fasten without play (do not overtighten sheet metal screws).

Screw in spindle (1) slowly and carefully and detach crankshaft radial seal.

Scheme 569

Installation

Clean sealing surface (1) and degrease thoroughly in area of housing partition.

Apply a light coat of oil to running surface (2) of crankshaft radial seal.

Scheme 570

Note. Support bushing (4) is contained in scope of delivery of crankshaft radial seal (1). When crankshaft radial seal (1) is installed, only support bushing (4) may be used as a slip bushing. Crankshaft radial seal (1) has a groove (2) on both left and right sides.

Scheme 571

Note. The required parts are available from the BMW Parts Department (Electronic Parts Catalogue).

Remove screw caps (1) from injector (2).

Screw on metering needle.

Insert piston for pressing out.

Injector (2) contains the sealing compound Loctite, manufacturer's number 128357.

Bottle (3) contains the primer Loctite, manufacturer's number 171000.

Scheme 572

Installation

Fit support bushing (4) with crankshaft radial seal (1) on crankshaft.

Align groove (2) centrally to housing partition (3).

Coat both grooves (2) on crankshaft radial seal (1) with Loctite primer, manufacturer's number 171000, and expose to air for approx. one minute.

Push crankshaft radial seal (1) by hand as far as possible onto running surface.

Carefully remove support bush (4).

Scheme 573

Note. Spacer ring (1) is supplied with radial shaft seal.

Screw special tool 11 9 182 with screws (special tool 11 9 184) to the crankshaft.

Fit spacer ring (1) on preassembled radial shaft seal.

Scheme 574

Draw in radial shaft seal and spacer ring with special tool 11 9 181 in conjunction with special tool 11 9 183.

Then remove spacer ring again.

Scheme 575

Before filling with sealing compound

Moisten brush with Loctite primer, manufacturer's number 171000. Insert brush as far as possible into grooves (1) on crankshaft radial seal in order to coat housing partition on engine block.

Scheme 576

Using injector, fill both grooves (1) flush with Loctite sealing compound, manufacturer's number 128357.

Scheme 577

Note. Loctite primer, manufacturer's number 171000, binds the Loctite sealing compound, manufacturer's number 128357, and prevents leakage. Coat surface of sealing compound in both grooves (1) with Loctite primer, manufacturer's number 171000.

Assemble engine.

11 14 151 Replacing radial crankshaft seal on transmission side (N52K) from 01.01.09

Necessary preliminary tasks

1. Remove «FLYWHEEL»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-22-500-removing-and-installingreplacing)

Remove magnet wheel (1) from crankshaft.

Scheme 578

Release screw on pulse sensor (1).

Slide PULSE SENSOR (2) upwards.

Scheme 579

Drill a hole with a drill (1) in the radial shaft seal (see arrow).

Scheme 580

Immediately carefully remove shavings on the radial shaft seal (1).

Scheme 581

Screw in special tool 23 0 490 in direction of arrow.

Drive out radial shaft seal with impact weight in direction of arrow.

Scheme 582

Prepare radial shaft seal (1) on special tool 11 8 220.

Scheme 583

Position the radial shaft seal (1) with special tool 11 8 220 on the crankshaft.

Scheme 584

Brush radial shaft seal (1) over the special tool 11 8 220.

Move radial shaft seal (1) parallel up against the crankcase.

Scheme 585

Fasten special tool 11 9 182 (synchronizing key) with special tool 11 9 184 (screw) on the crankshaft.

Scheme 586

Installation note

Prepare special tool 11 9 181 (bush) for installation.

Connect special tool 11 9 185 (ring) onto special tool 11 9 181 (bush).

Scheme 587

Pull on radial shaft seal with special tools 11 9 181 (bush) and 11 9 185 (ring) in combination with special tool 11 9 183 (nut).

Scheme 588

Screw on radial shaft seal with special tool 11 9 183 (nut) to limit position.

Scheme 589

Remove all special tools.

Assemble engine.

11 14 005 Replacing front crankshaft seal (N52K)

Necessary preliminary tasks

1. Remove «VIBRATION DAMPER»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-23-010-removing-and-installingreplacing)

Risk of damage!

Scheme 590

Turn back special tool 11 9 222.

Push special tool 11 9 221 onto crankshaft.

Insert screws (special tool 11 9 224) and tighten down to approx. 20 Nm.

Scheme 591

Screw special tool 11 0 371 to 80 Nm into crankshaft seal.

Screw in spindle 11 0 372.

Release crankshaft seal from housing.

Repeat the operation several times if necessary.

Scheme 592

Carefully saw open crankshaft seal (1) at cutting line (2).

Remove crankshaft seal (1) from special tool 11 0 371.

Scheme 593

Installation

Clean sealing surface (1) and degrease thoroughly in area of housing partition.

Apply a light coat of oil to running surface (2) of crankshaft seal.

Illustration N42.

Scheme 594

Screw special tool 11 9 232 with screws (special tool 11 9 234) to crankshaft.

Scheme 595

Note. Support sleeve (1) is supplied with crankshaft seal (2). When crankshaft seal (2) is installed, only support sleeve (1) may be used as a slip sleeve. Crankshaft seal (2) has a groove on both left and right sides.

Scheme 596

Note. The required parts are available from the BMW Parts Service.

Remove screw caps (1) from injector (2).

Screw on metering needle.

Insert piston for pressing out.

Injector (2) contains the sealing compound Loctite, manufacturer's number 128357.

Bottle (3) contains the primer Loctite, manufacturer's number 171000.

Push support sleeve (1) with crankshaft seal (2) onto special tool 11 9 232.

Align groove (3) centrally to housing partition (4).

Coat both grooves (3) on crankshaft seal (2) with Loctite primer, manufacturer's number 171000, and expose to air for approx. one minute.

Scheme 597

Draw in crankshaft seal with special tool 11 9 231 in conjunction with special tool 11 9 233 until flush.

Scheme 598

Before filling with sealing compound

Moisten brush with Loctite primer, manufacturer's number 171000. Insert brush as far as possible into grooves (1) on crankshaft seal in order to coat housing partition on engine block.

Illustration N42.

Scheme 599

Using injector (2), fill both grooves (3) flush with Loctite sealing compound, manufacturer's number 128357.

Illustration N42.

Scheme 600

Note. Loctite primer, manufacturer's number 171000, binds the Loctite sealing compound, manufacturer's number 128357, and prevents leakage.

Coat surface of sealing compound in both grooves (1) with Loctite primer, manufacturer's number 171000.

Illustration N42.

Assemble engine.

11 14 010 Replacing sealing cover for vacuum pump (N52K)

Necessary preliminary tasks

1. Remove «FAN COWL»(/bmw/z4/e89-2009-2013/remont/cooling-system-mechanical/#cooling-system-repair-n52__17-11-035-removing-and-installingreplacing) with electric fan
2. Remove alternator «DRIVE BELT»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-28-010-replacing-alternator-drive)
3. Remove «DRIVE BELT TENSIONER»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-28-020-replacing-tensioning-device)

Note. For purposes of clarity, graphics show alternator and power steering pump removed.

Secure special tools 11 8 535, 11 8 531, 11 8 537 and special tool 11 9 266.

Scheme 601

Position special tool 11 8 537 by hand on sealing cover.

Screw in special tool 11 8 534.

Note. The sealing cover is pressed out diagonally during this work step

Scheme 602

Screw in new sealing cover (1) with special tools 11 8 532 and 11 8 533 until flush with crankcase upper section.

Scheme 603

Assemble engine.

11 22 500 Removing and installing/replacing flywheel (N52K)

Necessary preliminary tasks

1. Remove transmission See «2300017 REMOVING AND INSTALLING TRANSMISSION (GS6-17BG) N52K»(/bmw/z4/e89-2009-2013/remont/manual-trans/#manual-transmission-repair-n52__23-00-017-removing-and-installing) or «2400030 REMOVING AND INSTALLING AUTOMATIC TRANSMISSION (6HP19Z) N52K»(/bmw/z4/e89-2009-2013/remont/automatic-trans/#automatic-transmission-repair-n52__24-00-030-removing-and-installing)
2. Remove «CLUTCH»(ref-381263-S01646499712010122800000)

For vehicles with optional extra SA205 (automatic transmission)

Secure flywheel (1) with existing transmission bolt (2) and special tool 11 9 260 .

Installation

Replace aluminum screws.

Unfasten flywheel screws.

Tightening torque 11 22 1AZ .

Installation

Flywheel (1) is secured with an alignment pin.

Fit new flywheel screws.

Clean all threads for flywheel screws in crankshaft.

Scheme 604

For vehicles without optional extra SA205 (automatic transmission)

Secure flywheel with transmission bolt (1) and special tool 11 9 260 and 11 9 265.

Installation

Replace aluminum screws.

Release flywheel bolts with special tool 11 4 180 /

Tightening torque 11 22 2AZ .

Installation

Flywheel is secured with a dowel pin.

Fit new flywheel screws.

Clean all threads for flywheel screws in crankshaft.

Scheme 605

Assemble engine.

11 21 531 Replacing all main crankshaft bearing shells (N52K)

Necessary preliminary tasks

1. Remove «CRANKSHAFT»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-21-500-replacing-crankshaft-n52k)

Checking position of oil spray nozzles

Insert special tool 11 4 251 in screw connection of main bearing.

Note. Special tool 11 4 252 must be pre-installed at the seventh main bearing.

Check position of oil spray nozzle (2) according to position (1) on special tool 11 4 251.

If necessary, adjust and secure oil spray nozzle (2).

Tightening torque 11 11 5AZ .

Scheme 606

Remove bearing shells (2) and guide bearing shell (3).

Note. Guide bearing shell (3) is a thrust bearing.

Observe bearing classification See ENGINE BLOCK, CYLINDER CRANKCASE N52K/B30 ; ENGINE BLOCK, CYLINDER CRANKCASE N52K/B25 ; CRANKSHAFT AND BEARINGS ; CRANKSHAFT AND BEARINGS ; CRANKSHAFT AND BEARINGS N52K/B30 ; CRANKSHAFT AND BEARINGS N52K/B25 ; CRANKSHAFT AND BEARINGS N52K/B30 or CRANKSHAFT AND BEARINGS N52K/B25 .

Scheme 607

Installation

Bearing shell (1) with lubricant groove must be fitted in crankcase.

Bearing shell (2) without lubricant groove must be fitted in bedplate.

Scheme 608

Surface (1) for identification on crankshaft web 1.

Seven-digit part number (2).

Main bearing classification (3) for crankcase lower half (bedplate), code numbers 1 2 3, see table.

Note. Code letters (4 and 5) are exclusively required for a machined crankshaft.

Code letter (4) as per table, main bearing.

B= build date 1 (B 1 2 3 -0.25 mm).

B= build date 2 (C 1 2 3 -0.50 mm).

Code letter (5) as per table, lift bearing.

Scheme 609

B= construction stage 1 (-0.25 mm).

C = construction stage 2 (-0.50 mm)

Observe bearing classification See CRANKSHAFT AND BEARINGS ; CRANKSHAFT AND BEARINGS ; CRANKSHAFT AND BEARINGS N52K/B30 ; CRANKSHAFT AND BEARINGS N52K/B25 ; CRANKSHAFT AND BEARINGS N52K/B30 or CRANKSHAFT AND BEARINGS N52K/B25 .

Main bearing classification (1) in crankcase, code letters A/B or C, see table.

Installation

When all the letters and number code have been determined, the bearing shell color must be allocated, see table.

Scheme 610

Installation

The letter/number combination produces a bearing shell pairing.

Identification by different colors.

Code letters on crankcase

Code letter A = bearing shell (1) color Yellow.

Code letter B = bearing shell (1) color Green.

Code letter C = bearing shell (1) color Red.

Code numbers on crankshaft

Code number 1 = bearing shell (2) Yellow.

Code number 2 = bearing shell (2) Green.

Code number 3 = bearing shell (2) Red.

Installation example

For bearing 1 with code letter A on the crankcase and code number 1 on the crankshaft bearing shell (1) with the color Yellow is required for the crankcase and bearing shell (2) with the color Yellow for the crankcase lower half (bedplate).

Bearing 2: A and 2 colors Yellow and Green.

Bearing 3: B and 2 colors Green and Green.

Bearing 4: C and 2 colors Red and Green.

Bearing 5: B and 1 colors Green and Yellow.

Bearing 6: C and 3 colors Red and Red.

Bearing 7: C and 1 colors Green and Green.

The color combination Yellow and Red must not be fitted.

Installation

Possible color combinations for mounting the crankshaft in the crankcase.

CRANKSHAFT COLOR REFERENCE CHART

Install bearing shells (2) and guide bearing shell (3).

Installation

Clean all sealing surfaces.

Clean sealing faces with special tool 11 4 470 only.

Determine bearing play with special tool 00 2 590.

Installation

All measuring points must be clean and free from oil and grease. If necessary, clean all measuring points.

Use the existing screws to determine the bearing play.

Set up BEDPLATE with bearing shells.

Remove bedplate.

Read off bearing play at width of flattened plastic thread and measurement scale.

Installation

Remove plastic thread.

Apply a light coat of oil to bearing shells and crankshaft.

Scheme 611

Install BEDPLATE .

Assemble engine.

11 21 500 Replacing crankshaft (N52K)

Necessary preliminary tasks

1. Remove «ENGINE»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-00-050-removing-and-installing)
2. Mount engine on assembly stand
3. Remove «VIBRATION DAMPER»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-23-010-removing-and-installingreplacing)
4. Remove «OIL SUMP»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-13-000-removing-and-installing)
5. Remove «OIL PUMP»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-41-000-removing-and-installingreplacing)
6. Remove oil pump/vacuum pump «CHAIN MODULE»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-41-010-removing-and-installingreplacing)
7. Remove timing «CHAIN MODULE»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-31-051-replacing-timing-chain)
8. Remove «CYLINDER HEAD»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-12-100-removing-and-installing)
9. Remove «FLYWHEEL»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-22-500-removing-and-installingreplacing)
10. Removing all «PISTONS»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-25-530-removing-and-installingreplacing)

Release screws (1).

Tightening torque 11 13 6AZ .

Installation

Replace aluminum screws.

Remove oil deflector (2).

Note. Graphic shows the screw connection of the oil deflector (2) for vehicles with optional extra SA203 (all-wheel drive).

Scheme 612

Release screws (1).

Tightening torque 11 11 2AZ .

Unfasten screws (2).

Tightening torque 11 11 3AZ .

Installation

Replace aluminum screws.

Scheme 613

Release screws (1).

Tightening torque 11 11 4AZ .

Unfasten screws (2).

Tightening torque 11 11 2AZ .

Installation

Replace aluminum screws.

Release steel screws (1 to 14) from outside inwards.

Tightening torque 11 11 1AZ .

Scheme 614

Release screws (1).

Tightening torque 11 11 3AZ .

Installation

Replace aluminum screws.

Lift out bedplate.

Scheme 615

Remove crankshaft (1) in direction of arrow.

Remove BEARING SHELLS (2) and guide bearing shell (3), replace if necessary.

Clean all sealing faces with special tool 11 4 470.

Check adapter sleeves (1) for damage and secure seating; replace if necessary.

Install all BEARING SHELLS .

Installation

Lubricate all bearing points with engine oil.

Note. Graphic shows N46.

Scheme 616

Insert crankshaft (1).

Scheme 617

Tighten steel screws (1 to 14) from inside outwards.

Tightening torque 11 11 1AZ .

Tighten screws (2) from inside outwards.

Tightening torque 11 11 2AZ .

Tighten screws (1).

Tightening torque 11 11 4AZ .

Installation

Replace aluminum screws.

Tighten aluminum screws exclusively with special tool 00 9 120 .

Scheme 618

Set up stand with magnetic foot (1) on special tool 11 4 440.

Set up special tool 00 2 510 on stand.

Position special tool 00 2 510 on crankshaft.

Move crankshaft in direction of arrow.

Determine bearing play . See CRANKSHAFT AND BEARINGS ; CRANKSHAFT AND BEARINGS ; CRANKSHAFT AND BEARINGS N52K/B30 ; CRANKSHAFT AND BEARINGS N52K/B25 ; CRANKSHAFT AND BEARINGS N52K/B30 or CRANKSHAFT AND BEARINGS N52K/B25 .

Scheme 619

Drive in both nozzles (1) with special tool 11 9 360 on left and right into crankcase.

Installation

Always replace nozzles (1).

Scheme 620

Replace CRANKSHAFT RADIAL SEAL at front.

Replace CRANKSHAFT RADIAL SEAL (transmission side).

Installation

Use PRIMER 1.3 AND LIQUID GASKET 1.4 .

Prepare liquid gasket (1) in special tool 11 4 370.

Screw on nozzle for injecting liquid gasket.

Slowly insert liquid gasket (1) with special tool 11 4 370 in direction of arrow.

Scheme 621

Stop (seal off) escaping liquid gasket with primer 1.3.

(Picture shows N40).

Assemble engine.

11 21 571 Replacing roller ball bearing in crankshaft (N52K)

Necessary preliminary tasks

1. Remove «CLUTCH»(ref-381263-S01646499712010122800000) .

Remove guide bearing with special tool 11 2 340.

Scheme 622

Install new thrust bearing and drive firmly home with special tool 11 2 350 in conjunction with special tool 00 5 500.

Scheme 623

Assemble engine.

11 21 505 Sealing the crankcase's lower part(N52K)

Necessary preliminary tasks

1. Remove «ENGINE»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-00-050-removing-and-installing) .
2. Mount engine on assembly stand.
3. Remove «CLUTCH»(ref-381263-S01646499712010122800000) (if fitted).
4. Remove left and right engine support arm See «2211100 REPLACING RIGHT ENGINE SUPPORT ARM (N52K)»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-and-gearbox-suspension-repair-n52__22-11-100-replacing-right-engine) or «2211110 REPLACING LEFT ENGINE SUPPORT ARM (N52K)»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-and-gearbox-suspension-repair-n52__22-11-110-replacing-left-engine)
5. Remove «OIL SUMP»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-13-000-removing-and-installing) .

Release screws (1).

Pull out oil pump intake pipe (2).

Tightening torque: 11 13 6AZ

Scheme 624

Release screws (1).

Tightening torque: 11 13 6AZ .

Installation

Replace aluminum screws.

Remove oil deflector (2).

Secure oil pump sprocket with steel pin 6.0 mm (3) to oil pump.

Release central bolt (2).

Tightening torque: 11 41 6AZ .

Scheme 625

Unfasten screws (2).

Tightening torque: 11 41 5AZ .

Installation

Replace aluminum screws.

Scheme 626

Remove screw plug (1) from crankcase at front.

Note. Replace gasket.

Scheme 627

Release screw (1) for oil pump triangular drive with special tool 11 8 640 .

Note. It is not necessary to remove the triangular drive.

Scheme 628

Version 1

Installation

Replace aluminum screws.

Scheme 629

Version 2

Installation

Replace aluminum screws.

Scheme 630

Detach sprocket (1) in direction of arrow.

Note. The chain tensioner pushes the timing chain (3) of the triangular drive upward. Do not remove camshaft sprocket.

Remove oil pump (2) in direction of arrow.

Scheme 631

Installation

Check spacer bushings (1) for secure seating and damage; replace if necessary.

Align twin surface (3) on oil pump (2) to sprocket wheel.

Install oil pump (2).

Scheme 632

Note. The special tool bore for the TDC position is located on the inlet side underneath the starter motor.

Rotate engine at central bolt and secure flywheel in position with special tool 11 0 300.

Scheme 633

Secure flywheel with special tool (1) 11 9 260 and special tool (2) 11 9 266.

Tightening torque

Note. Make sure that the special tool (1) completely engages in the flywheel teeth (see arrow)

Scheme 634

Automatic transmission

Release flywheel bolts (1).

Release special tool (2).

Remove flywheel (3).

Scheme 635

Manual gearbox

Remove dual-mass flywheel.

Secure flywheel with special tool 11 9 260.

Remove VIBRATION DAMPER .

Release flywheel bolts with special tool 11 4 180 /

Scheme 636

Scheme 637

Release all crankcase bolts (1) along line (2).

Scheme 638

Release crankcase bolts M10 in sequence 14 to 1.

Release crankcase lower section (1) from crankcase upper section (2) with suitable tool (3)

Remove crankcase lower section (1) upwards.

Scheme 639

Carefully remove radial shaft seal (1).

Catch escaping engine oil with a cloth (2).

Scheme 640

Carefully remove radial shaft seal (1) towards front.

Catch escaping engine oil with a cloth (2).

Scheme 641

Scheme 642

Remove sealant residues (1) with special tool 11 4 470.

Remove injector nozzles (2) for liquid sealing compound on left and right.

Installation

Replace injector nozzles (2).

Clean all threads with compressed air.

Scheme 643

Position crankcase lower section (1) on crankcase upper section.

Screw in all M10 crankcase bolts.

Joint all M10 crankcase bolts (1) 20 NM from inside outwards.

Scheme 644

Identify all M10 crankcase bolts with a colored marking (1) for checking.

Scheme 645

Secure crankcase bolts M10 in sequence 1 to 14 with special tool 00 9 120.

Tightening torque: 11 11 1AZ.

Insert all crankcase bolts (1).

Tighten screw (1) for oil pump triangular drive with special tool 11 8 640 .

Note. Replace screw. Tightening torque: 11 41 4 AZ .

Tighten screw plug on front of crankcase.

Tightening torque: 11 11 8 AZ.

Installation

Replace sealing ring.

Prepare radial shaft seal (1) on special tool 11 8 220.

Position radial shaft seal (1) with special tool 11 8 220 on the crankshaft.

Brush radial shaft seal (1) over the special tool 11 8 220.

Move radial shaft seal (1) parallel up against the crankcase.

Screw special tool 11 9 182 with screws (special tool 11 9 184) to crankshaft.

Scheme 646

Installation

Prepare special tool 11 9 181 for installation. Connect special tool 11 9 185 onto special tool 11 8 181.

Pull on radial shaft seal with special tool 11 9 181 and 11 9 185 in combination with special tool 11 9 183.

Scheme 647

Screw on radial shaft seal with special tool 11 9 183 to limit position.

Installation

Clean sealing surface (1) and degrease thoroughly in area of housing partition.

Apply a light coat of oil to running surface (2) of radial seal.

Note. Graphic N42.

Push radial shaft seal (1) 11 9 235carefully in direction of arrow on the special tool.

Scheme 648

Screw special tool 11 9 235 with special tool 11 9 234 on crankshaft.

Scheme 649

Align groove (2) of radial shaft seal (1) centered to the housing partition (3.

Scheme 650

Draw in radial seal with special

tool 11 9 231 in conjunction with special tool 11 9 233 until flush.

Scheme 651

Drive both injector nozzles (1) on left and right with special tool 11 9 360 into crankcase up to stop.

After fitting both sealing rings, check both sealing ducts for clearance.

Blow compressed air (1) at max. 6 bar into injector nozzle (2).

Compressed air must emerge at both sealing rings on left and right from the outlet bores.

Scheme 652

Installation

Use PRIMER 1.3 AND LIQUID SEAL 1.4 .

Prepare liquid sealing compound (1) in special tool 11 4 370 .

Injector nozzles for injecting sealing compound are not required.

Scheme 653

Slowly insert liquid sealing compound (1) with special tool 11 4 370 in direction of arrow.

Liquid sealing compound must emerge at radial shaft seals at front and rear.

Stop (seal off) escaping liquid gasket with primer 1.3.

Stop (seal off) escaping liquid gasket with primer 1.3.

Assemble engine.

Necessary preliminary tasks

1. Remove transmission . See «2300017 REMOVING AND INSTALLING TRANSMISSION (GS6-17BG) N52K»(/bmw/z4/e89-2009-2013/remont/manual-trans/#manual-transmission-repair-n52__23-00-017-removing-and-installing) or «2400030 REMOVING AND INSTALLING AUTOMATIC TRANSMISSION (6HP19Z) N52K»(/bmw/z4/e89-2009-2013/remont/automatic-trans/#automatic-transmission-repair-n52__24-00-030-removing-and-installing)
2. Remove «CLUTCH»(ref-381263-S01646499712010122800000)

For vehicles with optional extra SA205 (automatic transmission)

Secure flywheel (1) with existing transmission bolt (2) and special tool 11 9 260.

Installation

Replace aluminum screws.

Unfasten flywheel screws.

Tightening torque 11 22 1AZ .

Installation

Flywheel (1) is secured with an alignment pin.

Fit new flywheel screws.

Clean all threads for flywheel screws in crankshaft.

For vehicles without optional extra SA205 (automatic transmission)

Secure flywheel with transmission bolt (1) and special tool 11 9 260 and 11 9 265.

Installation

Replace aluminum screws.

Release flywheel bolts with special tool 11 4 180 /

Tightening torque 11 22 2AZ .

Installation

Flywheel is secured with a dowel pin.

Fit new flywheel screws.

Clean all threads for flywheel screws in crankshaft.

Assemble engine.

11 23 010 Removing and installing/replacing vibration damper (N52K)

Necessary preliminary tasks

1. Remove «UNDERBODY PROTECTION»(/bmw/z4/e89-2009-2013/remont/axle-shafts/#front-axle-repair__51-47-490-removing-and-installingreplacing) .
2. Remove «DRIVE BELT»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-28-010-replacing-alternator-drive)

Release screws (1).

Tightening torque 11 23 1AZ .

Remove vibration damper (2).

Scheme 654

Assemble engine.

11 24 571 Replacing all connecting rod bearing shells (N52K)

Necessary preliminary tasks

1. Remove «OIL SUMP»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-13-000-removing-and-installing)

Possible classifications per connecting rod at top and bottom

r: Red

b: Blue

Only one color may be fitted per big end bearing cap and connecting rod.

In direction of arrow from (1 to 2) crank pin (1 to 6).

Scheme 655

Example

Possible classification: rbbrrb

Cylinder 1: Classification Red/Red

Cylinder 2: Classification Blue/Blue

Cylinder 3: Classification Blue/Blue

Cylinder 4: Classification Red/Red

Cylinder 5: Classification Red/Red

Cylinder 6: Classification Blue/Blue

Release connecting rod bolts (1).

Remove connecting rod bearing cap (2).

Scheme 656

Gently release connecting rod from crankshaft.

Remove connecting rod bearing shells (1 and 2).

Install new connecting rod bearing shells.

Installation

Pay attention to guide lugs during installation.

Scheme 657

In each case insert only one color of connecting rod bearing shell (1 and 2) for each connecting rod.

Check connecting rod bearing clearance.

Piston in BDC position.

To determine the connecting rod bearing play, make sure that the bearing points are clean and free from oil and grease.

Fit special tool 00 2 590 (Plastigage type PG 1) to oil-free crankshaft.

Fit connecting rod bearing cap so that pairing letters match up.

Scheme 658

Use the old connecting rod bolts to check connecting rod clearance.

Tighten down connecting rod bolts with special tool 00 9 120.

Tightening torque 11 24 1AZ .

Scheme 659

Unscrew connecting rod bearing cap. Read off connecting rod bearing play at width of flattened plastic thread on measurement scale.

Connecting rod bearing play. See TED-TED-TDMUC1124-N52K-01B1S2 CONNECTING RODS AND BEARINGS N52K/B30 or TED-TED-TDMUC1124-N52K-01B1S1 CONNECTING RODS AND BEARINGS N52K/B25

1. Remove Plastigage
2. Coat crankshaft and connecting rod bearing shells with oil
3. Install new connecting rod bolts and tighten down with special tool 00 9 120.

Scheme 660

Tightening torque 11 24 1AZ .

Assemble engine.

11 25 530 Removing and installing or replacing all pistons (N16)

Connecting rods and connecting rod bearing caps are denoted with the same pairing letters; mixing them up will result in engine damage.

Piston and gudgeon pins are paired and must not be fitted individually.

Necessary preliminary tasks

1. Remove engine.
2. Mount engine on assembly stand.
3. Remove intake plenum.
4. Remove cylinder head.
5. Remove oil sump.
6. Remove oil pump.

Note. In event of heavy oil carbon residue

Carefully remove oil carbon residue from cylinder wall.

Note. Graphic shows N46.

Scheme 661

Note. Mark all pistons and conrods with a pen prior to removing.

Example N14

Direction of arrow (1) points to camshaft drive.

Cylinder allocation (2) per cylinder.

Scheme 662

Note. Mark all pistons and conrods with a pen prior to removing.

Example

Mark cylinder assignment (1) for the respective cylinder.

Direction of arrow (2) points to timing chain drive.

Scheme 663

Release connecting rod bolts (1).

Tightening torque, 11 24 1AZ .

Remove conrod bearing cap.

Scheme 664

11 9 620 Attach special tool in conrod big end.

Press out connecting rod and piston to cylinder head side.

Scheme 665

Lever out piston pin circlip with a screwdriver in direction of arrow.

Scheme 666

If necessary, replace connecting rods.

Installation note

The gudgeon pin must be able to be pressed through the liner by hand with little force and must not display any significant play.

Scheme 667

Measure piston installation clearance

Measure piston diameter with micrometer at measuring point A from lower edge of piston and offset by 90° to piston pin axis.

Piston diameter at measuring point A.

Scheme 668

Adjust micrometer to cylinder bore of engine block. Set internal calliper on micrometer to zero. Measure bottom, center and top of cylinder bore in direction of travel and direction of engine rotation.

Diameter of cylinder bore.

Piston installation clearance.

Total permissible wear tolerance.

If necessary, replace piston.

Scheme 669

Install all piston rings.

Install all bearing shells.

Coat piston and piston rings with oil.

11 9 670 Pre-install piston in special tool.

Screw special tool 11 9 620 into connecting rod.

Installation note

11 9 620 Check protective lugs on special tool for correct position and damage.

Scheme 670

Insert piston with connecting rod in cylinder.

Insert piston (1) so that arrow on piston crown points to camshaft drive.

If reusing the pistons, assign cylinder allocation (2) to correct cylinder.

Press in piston with special tool 11 9 670.

Scheme 671

Both pairing letters (2) must be together on one side.

Scheme 672

Apply a light coat of oil to crankshaft journals.

Attach connecting rod to crankshaft journal.

Remove special tool 11 9 620.

Fit bearing caps (2) so that pairing letters match up.

Check cylinder identification markings (1).

Direction of arrow (2) points to timing chain drive.

Install new connecting rod bolts (1).

Carry out torsion angle tightening of conrods with special tool 00 9 120

Tightening torque: 11 24 1AZ

Assemble engine.

11 25 530 Removing and installing/replacing all pistons (N52K)

Individual replacement of a connecting rod is not permitted. Connecting rods are classified by weight categories and are only available as a set for all cylinders.

Connecting rod and big end bearing cap are marked with identical pairing letters and must not be mixed up.

Danger of engine damage!

Piston and gudgeon pins are paired and must not be fitted individually.

Necessary preliminary tasks

1. Remove «ENGINE»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-00-050-removing-and-installing)
2. Mount engine on assembly stand
3. Remove intake «PLENUM»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-61-050-removing-and-installing)
4. Remove «CYLINDER HEAD»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-12-100-removing-and-installing) .
5. Remove «OIL SUMP»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-13-000-removing-and-installing)
6. Remove «OIL PUMP»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-41-000-removing-and-installingreplacing)

Note. Carefully remove heavy oil carbon residues from the cylinder wall (arrow).

Risk of damage!

Do not release screw (1) of oil spray nozzle (2).

If necessary, readjust OIL SPRAY NOZZLE (2).

Scheme 673

Release connecting rod bolts (1).

Tightening torque 11 24 1AZ .

Installation

Replace screws.

Remove connecting rod bearing cap (2) in direction of arrow.

Danger of engine damage!

Scheme 674

Attach special tool 11 8 330 to connecting rod.

Press out connecting rod and piston with special tool 11 8 330 towards cylinder head side.

Note. Special tool 11 8 330 also serves to prevent connecting rod and piston from falling down.

Scheme 675

Risk of damage!

Preliminary work

Clamp special tool 11 4 491 in vice.

Secure piston (1) with connecting rod to special tool 11 4 491.

Scheme 676

Lever out circlip for gudgeon pin with special tool 11 4 492 in direction of arrow.

Scheme 677

If necessary, replace connecting rods.

Installation

It must be possible for the piston pin to be pressed with minimal force by hand through the small end bushing. There must be no noticeable play.

Measure piston installation clearance

Measure piston diameter with micrometer at measuring point "A" from lower edge of piston and offset by 90° to piston pin axis.

Piston diameter See PISTONS WITH RINGS AND PINS N52K/B30 or PISTONS WITH RINGS AND PINS N52K/B25 at measuring point "A".

Adjust micrometer to cylinder bore of crankcase. Set internal caliper on micrometer to "zero". Measure bottom, center and top of cylinder bore in direction of travel and direction of engine rotation.

Diameter of cylinder bore.

Piston installation clearance.

Total permissible wear tolerance See ENGINE BLOCK, CYLINDER CRANKCASE N52K/B30 ; ENGINE BLOCK, CYLINDER CRANKCASE N52K/B25 ; ENGINE IN GENERAL N52K/B30 ; ENGINE IN GENERAL N52K/B25 ; PISTONS WITH RINGS AND PINS N52K/B30 ; PISTONS WITH RINGS AND PINS N52K/B25 ; PISTONS WITH RINGS AND PINS N52K/B30 or PISTONS WITH RINGS AND PINS N52K/B25 .

If necessary, replace piston.

Insert gudgeon pin circlip (2) into groove (1) of special tool 11 4 493.

Move piston pin circlip (2) into installation position.

Scheme 678

Guide lug and aperture on special tool 11 4 493 must point to piston crown. Only then can special tool 11 4 494 be correctly fitted.

When special tools 11 4 493 and 11 4 494 are correctly positioned, the circlip for gudgeon pin must be driven in with a plastic hammer in the direction of the arrow.

Scheme 679

Note. For vehicles with B30 engine.

Install all PISTON RINGS .

Install all CONNECTING ROD BEARING SHELLS .

Coat piston (2) and piston rings with oil.

Pre-install piston (2) in special tool 11 6 261.

Attach special tool 11 8 330 to connecting rod (1).

Installation

11 8 330 Check protective lugs on special tool for correct position and damage.

Scheme 680

Note. For vehicles with B25 engine.

Install all PISTON RINGS .

Install all CONNECTING ROD BEARING SHELLS .

Coat piston (2) and piston rings with oil.

Pre-install piston (2) in special tool 11 6 241.

Attach special tool 11 8 330 to connecting rod (1).

Installation

Check protective lugs on special tool for correct position and damage.

Scheme 681

Insert piston (1) with connecting rod in cylinder.

Press in piston (1) at marked points (see arrows) with finger pressure only, do not drive in.

Scheme 682

Insert piston (1) so that arrow (2) on piston crown points to camshaft drive.

Press in piston (1) with special tool 11 6 261/11 6 241.

Scheme 683

Apply a light coat of oil to connecting rod bearing journal.

Join connecting rod and connecting rod bearing journal.

Detach special tool 11 8 330.

Fit big end bearing caps (2) so that pairing letters match up.

Installation

Replace screws.

Install new connecting rod bolts (1).

Tightening torque 11 24 1AZ .

If necessary, tighten connecting rod bolts to torsion angle with special tool 00 9 120.

Tightening torque 11 24 1AZ .

Assemble engine.

11 25 671 Replacing piston rings on all pistons (N52K)

Necessary preliminary tasks

1. Removing all «PISTONS»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-25-530-removing-and-installingreplacing)

Measuring axial clearance of piston rings in piston ring groove.

Technical Data See PISTONS WITH RINGS AND PINS N52K/B30 ; PISTONS WITH RINGS AND PINS N52K/B25 ; PISTONS WITH RINGS AND PINS N52K/B30 or PISTONS WITH RINGS AND PINS N52K/B25 .

Note. It is not possible to measure the axial clearance of the U-flex rings.

Scheme 684

Remove plain compression ring and stepped ring upwards with piston ring pliers.

The U-flex ring comprises two steel band rings and a support spring.

Note. The U-flex ring cannot be removed with piston ring pliers. Put aside all piston rings in correct sequence and installation position. It might not be possible to find the identification on used piston rings.

Installation

New pistons may only be installed together with new piston rings.

Scheme 685

Determine end clearance See PISTONS WITH RINGS AND PINS N52K/B30 ; PISTONS WITH RINGS AND PINS N52K/B25 ; PISTONS WITH RINGS AND PINS N52K/B30 or PISTONS WITH RINGS AND PINS N52K/B25 with a feeler gauge.

Scheme 686

Note. Schematic diagram of piston rings.

Installation

Piston rings with "TOP" identification must point to piston crown.

1. Plain compression ring
2. Stepped ring "TOP"
3. U-flex ring

Scheme 687

Note. The U-flex ring comprises two steel band rings (1) and a support spring (2).

Installation

Insert support spring (2) into piston ring groove and then fit steel band rings (1) so that contact points are offset by approx. 120°.

Scheme 688

The contact points (1) of the piston rings must be arranged offset by approx. 120°. However, the contact points (1) must not be arranged over the piston pin boss.

Note. Picture shows N52.

Scheme 689

Assemble engine.

11 41 115 Removing and installing/replacing hydraulic valve (N52K)

Necessary preliminary tasks

1. Remove front «UNDERBODY PROTECTION»(/bmw/z4/e89-2009-2013/remont/axle-shafts/#front-axle-repair__51-47-490-removing-and-installingreplacing)
2. Have a cleaning cloth ready to catch escaping oil

Detach plug (1) from hydraulic valve (2).

Scheme 690

Release screw (1) and remove hydraulic valve (2).

Scheme 691

Replace O-ring (1).

Scheme 692

11 28 010 Replacing alternator drive belt (N52K)

Necessary preliminary tasks

1. Remove «FAN COWL»(/bmw/z4/e89-2009-2013/remont/cooling-system-mechanical/#cooling-system-repair-n52__17-11-035-removing-and-installingreplacing) with electric fan

Drive belt route

Turn belt tensioner (1) in direction of arrow until bore is flush on housing.

Secure belt tensioner (1) with special tool 11 3 340 .

Load is removed from tensioning pulley (2).

Remove drive belt upwards.

Scheme 693

Assemble engine.

Installation

Check drive belt for correct installation position and, if reusing, observe direction of rotation. Risk of damage .

11 28 020 Replacing tensioning device for alternator drive belt (N52K)

Necessary preliminary tasks

1. Remove «DRIVE BELT»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-28-010-replacing-alternator-drive)

E9x only

Remove special tool 11 3 340.

Release screw (3) on belt tensioner (4).

Tightening torque 11 28 1AZ .

Installation

Replace aluminum screws.

Remove belt tensioner (4).

Scheme 694

E85, E89 only

Remove special tool 11 3 340.

Release screw on belt tensioner (1).

Tightening torque 11 28 1AZ .

Installation

Replace aluminum screws.

Remove belt tensioner (1).

Assemble engine.

11 31 505 Adjusting timing of camshaft(s) (N52K)

Necessary preliminary tasks

1. Remove «CYLINDER HEAD COVER»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-12-000-removing-and-installingsealing)

Remove fastener (1) in direction of arrow.

Installation

Install fastener (1) with bore facing outwards.

Scheme 695

Rotate crankshaft at central bolt into TDC position.

Slide special tool 11 0 300 in direction of arrow into special tool bore and secure crankshaft.

If the flywheel is secured in the correct special tool bore with special tool 11 0 300, the engine can no longer be moved at the central bolt.

With 1st cylinder in firing TDC position, cams of inlet camshaft (1) at 1st cylinder point upwards at an angle.

Scheme 696

Part numbers (2) on inlet and exhaust camshafts (1) point upwards.

Scheme 697

With 1st cylinder in firing TDC position, cams of exhaust camshaft (3) at 6th cylinder point downwards at an angle.

Cam follower (1) is not actuated.

Note. When the engine is installed, the position of the exhaust camshaft (3) for the timing can only be checked with a mirror.

Scheme 698

Secure special tool 11 4 283 to cylinder head with bolts (1).

Note. Fit special tool 11 4 282 underneath on side of inlet camshaft.

Mount special tool 11 4 281 on inlet and exhaust camshafts.

Scheme 699

Release central bolts (1).

Release central bolts (1) with special tool 11 4 280 only.

Release chain tensioner (2) (have a cleaning cloth ready).

Note. Picture in CAD and does not show special tools.

Scheme 700

Turn sensor gears (2) in direction of arrow until locating pins (1) on special tool 11 4 290 match up.

Slide on special tool 11 4 290 in direction of arrow.

Scheme 701

Secure special tool 11 4 290 with bolts (1).

Screw special tool 11 9 340 into cylinder head.

Pretension timing chain with special tool 00 9 250 to 0.6 Nm .

Secure both central bolts of inlet and exhaust adjustment units with special tool 00 9 120 to inlet and exhaust camshafts.

Tightening torque 11 36 1AZ .

Scheme 702

Assemble engine.

11 31 005 Checking timing of camshaft(s) (N52K)

Necessary preliminary tasks

1. Remove «CYLINDER HEAD COVER»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-12-000-removing-and-installingsealing)
2. Remove «UNDERBODY PROTECTION»(/bmw/z4/e89-2009-2013/remont/axle-shafts/#front-axle-repair__51-47-490-removing-and-installingreplacing) .

Remove fastener (1) in direction of arrow.

Installation

Install fastener (1) with bore facing outwards.

Rotate crankshaft at central bolt into TDC position.

Slide special tool 11 0 300 in direction of arrow into dowel hole and secure crankshaft.

If the flywheel is secured in the correct dowel hole with special tool 11 0 300 , the engine can no longer be moved at the central bolt.

With 1st cylinder in firing TDC position, cams of inlet camshaft (1) at 1st cylinder point upwards at an angle.

The timings are correct when the part numbers (2) on the inlet and exhaust camshafts (1) point upwards.

With 1st cylinder in firing TDC position, cams of exhaust camshaft (3) at 6th cylinder point downwards at an angle.

Cam follower (1) is not actuated.

Note. When the engine is installed, the position of the exhaust camshaft (3) for the timing can only be checked with a mirror.

Secure special tool 11 4 283 with bolts (1) to cylinder head.

Note. Fit special tool 11 4 282 underneath on side of intake camshaft.

Mount special tool 11 4 281 on intake and exhaust camshafts.

If necessary, adjust VALVE TIMING .

Assemble engine.

11 31 090 Installing and removing/replacing chain tensioner piston (N52K)

Release chain tensioner (1).

Tightening torque 11 31 6AZ .

Installation

No sealing ring is fitted during series-production assembly.

Scheme 703

A sealing ring must be fitted by service personnel when the chain tensioner is fitted.

If the chain tensioner is reused, its oil chamber must be drained. Place chain tensioner on a level working surface and slowly compress.

Repeat procedure twice.

Scheme 704

Assemble engine.

11 31 028 Removing and installing/replacing exhaust camshaft (N52K)

Necessary preliminary tasks

1. Remove «CYLINDER HEAD COVER»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-12-000-removing-and-installingsealing)
2. Remove «EXHAUST CAMSHAFT ADJUSTER»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-36-046-removing-and-installingreplacing)
3. Adjust «VALVE TIMING»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-31-505-adjusting-timing-of)

The screw connection of the bearing strips must be released from the outside inwards.

Lift out upper and lower bearing strips (1) with exhaust camshaft.

Remove upper bearing strip (1).

Remove exhaust camshaft from lower bearing strip.

Scheme 705

Scheme 706

Metal plain rectangular compression ring

Only replace plain rectangular compression rings (1) when they are broken.

The plain rectangular compression rings have catches at the joint.

Press plain rectangular compression rings (1) apart upwards and downwards and removed towards front.

Make sure plain rectangular compression rings (1) can move freely.

Installation note: When exhaust camshafts are inserted, no joint must point to a separating joint.

Scheme 707

Plastic plain rectangular compression ring

Installation note: The plastic plain rectangular compression ring is maintenance free and does not have to be replaced.

Insert plastic rectangular compression ring (1) into groove of exhaust camshaft (2) (see arrow).

Lightly oil plastic rectangular compression ring (1) and rotate in direction of arrow until compression ring (1) is positioned on the exhaust camshaft.

Scheme 708

Check plastic plain rectangular compression ring (1 and 2) for freedom of movement.

Scheme 709

Important! Removal on engine: Set engine to ignition TDC at cylinder No. 1. Removed cylinder head: When using special tool 11 9 000, it will be necessary to remove the aluminum strip.

Mounting bearing strip

Pre-install special tool 11 4 462 on cylinder no. 2.

Insert special tool 11 4 463 in screw connection of cylinder head cover.

Press down rocker arms (3) on cylinder no. 2 with spindle nut (2) of special tool 11 4 462.

Scheme 710

Installation

Before mounting the exhaust camshaft on the correct cam follower seat (1), pay attention to the hydraulic valve clearance adjustment element and the valve.

Refer to Removing and installing/replacing all CAM FOLLOWERS .

Scheme 711

Position lower bearing strip (1) with exhaust camshaft (2) on rocker arms.

Align exhaust camshaft (2).

Cylinder nos. 2 and 4 are at valve overlap.

Cams (3) on cylinder no. 1 point upwards at an angle.

Part number (4) on mounting flats of exhaust camshaft (2) points upwards.

Scheme 712

Fit upper bearing strip (1).

Insert bolts dry.

Tension down upper bearing strip (1) with exhaust camshaft at bearing points 3 and 5 through a 1/2 bolt turn.

Join exhaust camshaft to upper and lower bearing strips (1) with torque wrench (2) from inside outwards to 8 Nm .

Release all screws of upper bearing strip (1) from outside inwards by 90°.

Installation

Upper and lower bearing strips must be aligned to each other at ground surfaces (1 and 2).

Make sure that the thrust piece and the legs of special tools 11 4 461 rest on the milled surfaces.

Scheme 713

Note. Schematic depiction of special tool 11 4 461 at upper bearing strip (1) and lower bearing strip (2). Pre-tension all special tools 11 4 461 with special tool 11 4 350 only.

Scheme 714

Position special tool 11 4 461 over screw connection of bearing strips.

Make sure that the legs rest exactly on the ground surfaces of the upper bearing strip (2) and lower bearing strip (1).

Scheme 715

Initially tighten screw of special tool 11 4 461 to ground surfaces of upper bearing strip (1) and lower bearing strip (2).

Scheme 716

Scheme 717

Mount special tools 11 4 461 with screw (1) to inside of cylinder head.

Mount special tool 11 4 461 with screw facing outwards on cylinder no. 2.

Position special tools 11 4 461 so that screw connections (2) of bearing strip are easily accessible.

Scheme 718

Tighten upper and lower bearing strips with special tool 00 9 120.

Tightening torque 11 31 1AZ .

Scheme 719

Assemble engine.

11 31 025 Removing and installing/replacing intake camshaft (N52K)

Necessary preliminary tasks

1. Remove «CYLINDER HEAD COVER»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-12-000-removing-and-installingsealing)
2. Remove «INTAKE CAMSHAFT ADJUSTER»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-36-046-removing-and-installingreplacing)
3. Remove «INTERMEDIATE LEVER»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-37-010-removing-and-installingreplacing)
4. Adjust «VALVE TIMING»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-31-505-adjusting-timing-of)

Note. All bearing caps (1 and 2) are marked with numbers from 1 to 6.

Bearing cap (1) is a thrust bearing.

Release screws on bearing caps 1 to 6 (1 and 2).

Tightening torque 11 31 2AZ .

Set all bearing caps down in special tool 11 4 481 in a neat and orderly fashion.

Scheme 720

Remove intake camshaft (2) towards top.

Installation

Clean all bearing points and lubricate with oil.

Scheme 721

Metal plain rectangular compression ring

Plain compression rings (1) are engaged at joint.

Press plain compression rings (1) apart upwards and downwards and removed towards front.

Make sure plain rectangular compression rings (1) can move freely. Installation note: When intake camshafts are inserted, no joint must point to a separating joint.

Installation note: The plastic plain rectangular compression ring is maintenance free and does not have to be replaced.

Insert plastic plain rectangular compression ring (1) into groove of intake camshaft (2) (see arrow). Lightly oil plastic plain rectangular compression ring (1) and rotate in direction of arrow until plastic plain rectangular compression ring (1) is positioned on the intake camshaft.

Check plastic plain rectangular compression ring (1 and 2) for freedom of movement.

Insert intake camshaft (1) so that part number on mounting flats points upwards.

Position intake camshaft (1) so that cams point upwards at an angle.

Attach special tool 11 4 281 to mounting flats.

Assemble engine.

11 31 051 Replacing timing chain (N52K)

Necessary preliminary tasks

1. Remove «CYLINDER HEAD COVER»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-12-000-removing-and-installingsealing)
2. Remove all spark plugs
3. Remove «CHAIN TENSIONER»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-31-090-installing-and-removingreplacing) .
4. Remove «CRANKSHAFT RADIAL SEAL»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-14-005-replacing-front-crankshaft) at front
5. Remove drive belt «TENSIONER»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-28-020-replacing-tensioning-device)
6. Remove «VIBRATION DAMPER»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-23-010-removing-and-installingreplacing)

Remove fastener (1) in direction of arrow.

Installation

Install fastener (1) with bore facing outwards.

Rotate crankshaft at central bolt into TDC position.

Slide special tool 11 0 300 in direction of arrow into special tool bore and secure crankshaft.

If the flywheel is secured in the correct special tool bore with special tool 11 0 300, the engine can no longer be moved at the central bolt.

Screw special tool 11 9 280 onto hub of vibration damper.

Release central bolt (1).

Tightening torque 11 21 1AZ .

Remove hub towards front.

Scheme 722

Open plug (1).

Tightening torque 11 31 7AZ .

Scheme 723

Open plug (1).

Tightening torque 11 11 7AZ .

Installation

Replace aluminum screws.

Scheme 724

Release bearing pin (1) from timing chain module on cylinder head.

Tightening torque 11 31 5AZ .

Scheme 725

Release bearing pin (1) from timing chain module on crankcase.

Tightening torque 11 31 4AZ .

Scheme 726

Secure special tool 11 4 283 to cylinder head with bolts (1).

Note. Fit special tool 11 4 282 underneath on side of inlet camshaft.

Mount special tool 11 4 281 on inlet and exhaust camshafts.

Do not remove special tool 11 4 280.

Remove INLET AND EXHAUST ADJUSTMENT UNIT .

Release bolts (1) from timing chain module on cylinder head.

Tightening torque 11 31 3AZ .

Remove chain module with timing chain and sprocket wheel upwards in direction of arrow.

Scheme 727

Scheme 728

Pull timing chain (1) upwards until sprocket wheel (2) engages chain guide (3).

Install timing chain (1) and sprocket wheel (2) in this position.

Installation

Always hold timing chain (1) under tension. Timing chain (1) may jam on chain guide (3).

Scheme 729

Install hub with central bolt.

Tighten down special tool 11 5 200 with screws (1) to hub.

Scheme 730

Remove TENSIONER for drive belt.

Screw in special tool 11 4 362 from special tool kit 11 4 360.

Mount special tool 11 9 280 on 11 5 200.

Support special tool 11 9 280 on special tool 11 4 362.

Special tool 11 0 300 secures crankshaft.

Tighten central bolt to jointing torque.

Tightening torque 11 21 1AZ .

Mark central bolt and hub with paint.

Scheme 731

Mark special tools with colored line (1).

See picture.

If necessary, tighten central bolt to torsion angle with special tool 00 9 140.

Tightening torque 11 21 1AZ .

Scheme 732

Tighten central bolt with a second person helping.

Tightening torque 11 21 1AZ .

Install INLET AND EXHAUST ADJUSTMENT UNITS .

Install CHAIN TENSIONER .

Crank engine twice.

Check TIMING .

If necessary, adjust VALVE TIMING .

Assemble engine.

11 33 050 Removing and installing/replacing all cam followers (N52K)

Necessary preliminary tasks

1. Remove «CYLINDER HEAD COVER»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-12-000-removing-and-installingsealing)
2. Remove «INTERMEDIATE LEVER»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-37-010-removing-and-installingreplacing)
3. Remove «EXHAUST CAMSHAFT»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-31-028-removing-and-installingreplacing) .

Installation

Before installing exhaust camshaft or intermediate levers, make sure cam followers (1) are correctly seated.

Remove HVCA element (1) in direction of arrow.

Installation

If the HVCA elements (1) are reused, they must be placed together with the cam followers in neat order in special tool 11 4 480.

Scheme 733

Assemble engine.

Check function of DME; if necessary, readjust uniform mixture distribution.

11 34 552 Removing and installing/replacing all valves (N52K)

Necessary preliminary tasks

1. Remove «CYLINDER HEAD»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-12-100-removing-and-installing)
2. Remove «INTERMEDIATE LEVER»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-37-010-removing-and-installingreplacing)
3. Remove «ECCENTRIC SHAFT»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-37-005-removing-and-installingreplacing)
4. Remove «INLET CAMSHAFT»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-31-025-removing-and-installingreplacing)
5. Remove «EXHAUST CAMSHAFT»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-31-028-removing-and-installingreplacing)
6. Remove «CAM FOLLOWERS»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-33-050-removing-and-installingreplacing)
7. Remove «VALVE SPRINGS»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-34-715-replacing-all-valve)
8. Remove «VALVE STEM SEALS»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-34-560-replacing-all-valve)

Arrangement

1. Valve
2. Valve stem seal with lower spring plate
3. Valve spring
4. Upper spring plate
5. Valve tapers

If the valves are to be reused, they must be placed in neat order in special tool 11 4 480.

Scheme 734

Assemble engine.

Check function of DME; if necessary, readjust uniform mixture distribution.

11 34 715 Replacing all valve springs (N52K)

Necessary preliminary tasks

1. Remove «CYLINDER HEAD»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-12-100-removing-and-installing)
2. Remove «EXHAUST CAMSHAFT»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-31-028-removing-and-installingreplacing) .
3. Remove «INTERMEDIATE LEVER»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-37-010-removing-and-installingreplacing)
4. Remove «INLET CAMSHAFT»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-31-025-removing-and-installingreplacing)
5. Remove «CAM FOLLOWERS»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-33-050-removing-and-installingreplacing)

Place cylinder head on special tool 11 9 000.

Press down inlet valves with special tool 11 9 017.

Press down exhaust valves with special tool 11 0 346.

Scheme 735

Remove valve cotters with a magnet.

Remove valve spring with spring plates.

If the individual components are to be reused, they must be placed in neat order in special tool 11 4 480.

Scheme 736

The valve spring is colour-coded (1) at the lower end.

Install the valve spring so that the larger diameter points to the lower spring plate.

Scheme 737

Arrangement

1. Valve
2. Valve stem seal with lower spring plate
3. Valve spring
4. Upper spring plate
5. Valve tapers

Assemble engine.

Check function of DME; if necessary, readjust uniform mixture distribution.

11 34 560 Replacing all valve stem seals (N52K)

Necessary preliminary tasks

1. Remove «CYLINDER HEAD»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-12-100-removing-and-installing) .
2. Remove «INTERMEDIATE LEVER»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-37-010-removing-and-installingreplacing)
3. Remove «ECCENTRIC SHAFT»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-37-005-removing-and-installingreplacing)
4. Remove «INLET CAMSHAFT»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-31-025-removing-and-installingreplacing)
5. Remove «EXHAUST CAMSHAFT»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-31-028-removing-and-installingreplacing) .
6. Remove «CAM FOLLOWERS»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-33-050-removing-and-installingreplacing)

Firmly press special tool 11 1 480 onto old valve stem seals.

Detach valve stem seal from valve stem by turning and simultaneously pulling special tool 11 1 480.

Installation

Insert all VALVES .

Scheme 738

Note. For use on the N52K engine, special tool 11 6 380 must be remachined according to the picture with a 10 mm dia. drill bit to a depth of B = approx. 23 mm. This modification has already been taken into account for reordering.

Scheme 739

For 5 mm dia. valves, the valve stem seal is marked red or brown.

For 6 mm dia. valves, the valve stem seal is marked green or light green.

Scheme 740

Installation

Fit the mounting sleeves (plastic sleeves) contained in the delivery specification on the valve stem end.

Lubricate mounting sleeve.

Press on valve stem seal by hand with special tool 11 6 380 as far as it will go.

Scheme 741

Assemble engine.

11 36 655 Removing and installing/replacing both solenoid valves (N52K)

Necessary preliminary tasks

1. Remove «FAN COWL»(/bmw/z4/e89-2009-2013/remont/cooling-system-mechanical/#cooling-system-repair-n52__17-11-035-removing-and-installingreplacing) (E89 only)

Disconnect plug connection (1) on inlet solenoid valve (2).

Release screw (3).

Note. Secure support and sealing ring against falling down.

Remove inlet solenoid valve (2) with bracket towards front.

Disconnect plug connection (6) on exhaust solenoid valve (5).

Release screw (4).

Note. Secure support and sealing ring against falling down.

Scheme 742

Remove exhaust solenoid valve (5) with bracket towards front.

Tightening torque 11 36 3AZ .

Installation

Replace support and sealing rings.

Assemble engine.

Check function of DME.

11 36 046 Removing and installing/replacing inlet and exhaust adjustment units (N52K)

Necessary preliminary tasks

1. Remove «CYLINDER HEAD COVER»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-12-000-removing-and-installingsealing)
2. Check «TIMING»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-31-005-checking-timing-of)

Fit special tool 11 4 283 with screws (1).

Fit special tool 11 4 281 on special tool 11 4 283.

Release chain tensioner (2).

Tightening torque 11 31 6AZ .

Release central bolts on inlet and exhaust adjustment units (1).

Tightening torque 11 36 1AZ .

Installation

Replace central bolts.

Note. Picture in CAD and does not show special tools.

Remove exhaust adjustment unit (1) from exhaust camshaft.

Remove inlet adjustment unit (2) from inlet camshaft.

Installation

To facilitate removal and installation of the inlet and exhaust adjustment units, turn the sensor gears at the opening downwards.

Scheme 743

Inlet and exhaust adjustment units are different.

VANOS is marked with AUS/EX for the exhaust camshaft.

VANOS is marked with EIN/IN for the inlet camshaft.

Sensor gears can be fitted alternatively.

Scheme 744

Position inlet and exhaust adjustment units on camshafts.

Installation position of inlet and exhaust adjustment units can be freely selected.

Insert central bolts (1).

Tightening torque 11 36 1AZ .

Installation

Replace central bolts.

Note. Picture in CAD and does not show special tools.

Press clamping rail (1) by hand against guide rail and make sure timing chain is guided in clamping rail (1).

Note. Schematic representation of removed timing chain module.

Adjust VALVE TIMING .

Fit CHAIN TENSIONER .

Scheme 745

Assemble engine.

11 37 005 Removing and installing/replacing eccentric shaft (N52K)

Necessary preliminary tasks

1. Remove «CYLINDER HEAD COVER»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-12-000-removing-and-installingsealing)
2. Remove «INTERMEDIATE LEVER»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-37-010-removing-and-installingreplacing)

If necessary, move eccentric shaft (1) on twin surface to minimum lift (2).

Note. All bearing caps (1 and 2) of eccentric shaft are marked with numbers from 1 to 6 (1 for 1st cylinder to 6 for 6th cylinder). Bearing cap 6 (1) is provided with a stop.

Release screws on bearing cap 6 (1).

Release screws on bearing caps 1 to 5 (2).

Set all bearing caps down in special tool 11 4 481 in a neat and orderly fashion.

Remove eccentric shaft with gentle tilting and turning movements.

Scheme 746

Release screw.

Remove magnet wheel (1).

Scheme 747

Carefully pull needle bearing (1) apart at point of separation.

Remove all needle bearings (1) from eccentric shaft.

Scheme 748

Install bearing shells (1) as pictured.

Note. Always replace bearing shells (1) and needle bearings together.

Scheme 749

Install bearing shell (1) with tip facing down (see arrow) in cylinder head.

Install bearing shell (2) with tip facing up in bearing cap.

Scheme 750

Note. All bearing caps (1 and 2) of eccentric shaft are marked with numbers from 1 to 6 (1 for 1st cylinder to 6 for 6th cylinder). Bearing cap 6 (1) is provided with a stop.

Insert eccentric shaft.

Adjust eccentric shaft on dihedron to minimum stroke.

Fit all bearing caps (1 and 2).

Insert all screws.

Tightening torque 11 12 7AZ .

Installation

Spline teeth of eccentric shaft must be greased with LONGTIME PD 1 (2.2) .

Assemble engine.

11 37 010 Removing and installing/replacing intermediate levers (N52K)

Note. There are 2 different versions of the guide block

Version 1

Size (1) 55.2 mm

Scheme 751

Necessary preliminary tasks

1. Remove «CYLINDER HEAD COVER»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-12-000-removing-and-installingsealing)

If necessary, move eccentric shaft (1) on twin surface to minimum lift (2).

Note. Oil spray nozzle must be removed from 3rd cylinder (make a note of installation position of oil spray nozzle).

Scheme 752

Note. Oil spray nozzle must be removed from 3rd cylinder (make a note of installation position of oil spray nozzle).

Secure special tool 11 4 270 to guide block (2) using locking pliers (3).

Scheme 753

Secure both bearing pins (2) in torsion springs with knurled screw (1) of special tool 11 4 270.

Press special tool 11 4 270 to stop in direction of arrow.

Scheme 754

Release screw (2) of torsion spring.

Tightening torque 11 37 2AZ .

To avoid misalignment of screw (2) with torsion spring, it is necessary when releasing screw (2) to relieve the tension on the special tool 11 4 270 evenly.

Scheme 755

Release tension on torsion spring (1) with special tool 11 4 270 .

Note. Metal lug (2) can not be disassembled and must not be removed.

Installation

Replace torsion spring (1) if metal lug (2) is faulty.

Scheme 756

Press torsion spring apart at positions (1).

Remove torsion spring towards top.

Scheme 757

All components must be reinstalled in the same positions in an engine which has already been in use.

Scheme 758

1. Eccentric shaft with bearing
2. Bearing caps of eccentric shaft (set out in order)
3. Intake camshaft
4. Bearing caps of inlet camshaft (set out in order)
5. Intake valves with valve springs
6. Valve plates and valve cotters
7. Cam followers with HVCA elements (set out in order)
8. Torsion springs
9. Guide blocks (set out in order)
10. Intermediate levers (set out in order)

Release screws (1) on guide block (2).

Tightening torque 11 37 1AZ .

Place all guide blocks (2) in neat order in special tool 11 4 481.

Installation

Mixing up the guide blocks (2) will cause the engine to suffer idle-speed fluctuations.

This will result in maladjustment of uniform distribution .

Scheme 759

Installation

All contact surfaces (1) of guide block must be clean and free from oil and grease. If necessary, clean contact surfaces (1).

Scheme 760

Lift out intermediate levers (2).

Place all intermediate levers (2) in neat order in special tool 11 4 481.

Installation

Mixing up the intermediate levers (2) will cause the engine to suffer idle-speed fluctuations.

Installation

All contact surfaces (1) must be clean and free from oil and grease. If necessary, clean contact surfaces (1).

Scheme 761

All intermediate levers (1) are classified.

All intermediate levers (1) must be reinstalled in the same positions in an engine which has already been in use.

Scheme 762

Install intermediate levers (2).

Fit guide block (2) cleanly into opening.

Tighten screws (1) hand-tight.

Check that intermediate levers are in correct installation position.

Release screws (1) by a 1/4 turn.

Secure special tool 11 4 450 to screw fixing (1) of eccentric shaft.

Move eccentric lever (3) on special tool 11 4 450 in direction of arrow.

Guide block is now pretensioned.

Insert screws (2) of guide blocks.

Tightening torque 11 37 1AZ .

Installation

At cylinder no. 3, the guide block can be pre-installed with one screw (internal) only.

Oil spray nozzle is fitted only after torsion spring has been installed.

Scheme 763

Install torsion spring (2) on guide block.

Installation

Insert torsion spring (2) in intermediate lever (1) (see arrow).

Check that cam follower (3) is in correct installation position.

Scheme 764

Secure special tool 11 4 270 to guide block (2) using locking pliers (3).

Secure both bearing pins (2) in torsion springs with knurled screw (1) of special tool 11 4 270 .

Press special tool 11 4 270 to stop in direction of arrow.

Insert screw (2) of torsion spring.

Tightening torque 11 37 2AZ .

To avoid misalignment of screw (2) with torsion spring, it is necessary when inserting screw (2) to increase tension on special tool 11 4 270 evenly.

Remove special tool 11 4 270.

At cylinder no. 3, adjust oil spray nozzle (2) so that oil spray points precisely towards spline teeth (3).

Insert screw (1) with oil spray nozzle (2) (external).

Tightening torque 11 37 4AZ .

Assemble engine.

Version 2

Size (1) 58 mm

Necessary preliminary tasks

1. Remove «CYLINDER HEAD COVER»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-12-000-removing-and-installingsealing)

If necessary, move eccentric shaft (1) on twin surface to minimum lift (2).

Note. Oil spray nozzle must be removed from 3rd cylinder (make a note of installation position of oil spray nozzle).

Position special tool 11 7 110 on return spring (1) (see arrows).

Scheme 765

Place special tool 11 7 110 flat on cylinder head.

Turn knurled screw (1) in direction of arrow until both clamping levers secure return spring in guide block.

Scheme 766

Return spring is correctly preloaded when both clamping levers are parallel to guide block.

Scheme 767

Left and right return springs (1) must be positioned in lateral guide of special tool 11 7 110 .

Scheme 768

Preload return spring with lever (1) on special tool 11 7 110 in direction of arrow.

Scheme 769

Lock special tool 11 7 110 with catch on lever (1).

Scheme 770

Release screw (1).

Scheme 771

Secure lever (1)

Press back latching hook (2).

Return spring tension can now be released.

Scheme 772

Release knurled screw (1) on special tool 11 7 110 in direction of arrow.

Scheme 773

Release special tool 11 7 110 in direction of arrow from return spring (1).

Scheme 774

Press torsion spring apart at positions (1).

Remove torsion spring towards top.

All components must be reinstalled in the same positions in an engine which has already been in use.

1. Eccentric shaft with bearing
2. Bearing caps of eccentric shaft (set out in order)
3. Intake camshaft
4. Bearing caps of inlet camshaft (set out in order)
5. Intake valves with valve springs
6. Valve plates and valve cotters
7. Cam followers with HVCA elements (set out in order)
8. Torsion springs
9. Guide blocks (set out in order)
10. Intermediate levers (set out in order)

Release screws (1) on guide block (2).

Tightening torque 11 37 1AZ .

Place all guide blocks (2) in neat order in special tool 11 4 481.

Installation

Mixing up the guide blocks (2) will cause the engine to suffer idle-speed fluctuations.

This will result in maladjustment of uniform distribution .

Scheme 775

Installation

All contact surfaces (1) of guide block must be clean and free from oil and grease. If necessary, clean contact surfaces (1).

Lift out intermediate levers (2).

Place all intermediate levers (2) in neat order in special tool 11 4 481.

Installation

Mixing up the intermediate levers (2) will cause the engine to suffer idle-speed fluctuations.

Installation

All contact surfaces (1) must be clean and free from oil and grease. If necessary, clean contact surfaces (1).

All intermediate levers (1) are classified.

All intermediate levers (1) must be reinstalled in the same positions in an engine which has already been in use.

Install intermediate levers (2).

Fit guide block (2) cleanly into opening.

Tighten screws (1) hand-tight.

Check that intermediate levers are in correct installation position.

Release screws (1) by a 1/4 turn.

Secure special tool 11 4 450 to screw fixing (1) of eccentric shaft.

Move eccentric lever (3) on special tool 11 4 450 in direction of arrow.

Guide block is now pretensioned.

Insert screws (2) of guide blocks.

Tightening torque 11 37 1AZ .

Installation

At cylinder no. 3, the guide block can be pre-installed with one screw (internal) only.

Oil spray nozzle is fitted only after torsion spring has been installed.

Install torsion spring (2) on guide block.

Installation

Insert torsion spring (2) in intermediate lever (1) (see arrow).

Check that cam follower (3) is in correct installation position.

Position special tool 11 7 110 on return spring.

Clamp return spring with knurled screw (1) in direction of arrow.

Return spring (1) is positioned correctly when catches (see arrows) are surrounding return spring (1).

Press special tool 11 7 110 to stop in direction of arrow.

Tighten bolt (1).

Tightening torque 11 37 2AZ .

At cylinder no. 3, adjust oil spray nozzle (2) so that oil spray points precisely towards spline teeth (3).

Insert screw (1) with oil spray nozzle (2) (external).

Tightening torque 11 37 4AZ .

Assemble engine.

11 40 000 Checking engine oil pressure without hydraulic valve (N52, N52K)

Necessary preliminary tasks

1. Remove «ACOUSTIC COVER»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-00-removing-and-installingreplacing-acoustic)
2. Protect drive belt against dirt
3. Have a cleaning cloth ready to catch escaping oil

Disconnect plug connection on oil pressure switch (3)

Remove oil pressure switch (3).

Scheme 776

Screw in special tool 11 4 050 with sealing ring.

Scheme 777

Check engine oil pressure with diagnosis system.

Connect special tools 13 6 054 and 13 6 051.

Check engine oil pressure with pressure gauge.

Connect special tools 13 3 063 and 13 3 061.

Start engine and check engine oil pressure.

Specified values See OIL PUMP WITH STRAINER AND DRIVE N52K/B25 .

Scheme 778

Assemble engine.

11 40 000 Checking engine oil pressure with hydraulic valve (N53, N52K)

Necessary preliminary tasks

1. Connect BMW diagnosis system to vehicle.
2. Observe diagnosis instructions.
3. Protect drive belt against dirt
4. Have a cleaning cloth ready to catch escaping oil

Secure special tool 11 9 250 at hexagon head in a vice.

Release insert (2) using a screwdriver (1) in direction of arrow.

Scheme 779

Release screw piece (1) on special tool 11 6 410.

Scheme 780

Install special tool 11 6 410 in special tool 11 9 250.

Insert central screw with a screwdriver (1) hand-tight.

Scheme 781

Insert screw piece (1) hand-tight in direction of arrow on special tool 11 6 410.

Scheme 782

Release oil filter cap with special tool 11 9 240.

Tightening torque: 11 42 1 AZ.

Carefully detach filter element.

Installation

Check all O-rings for damage, replace if necessary.

Install filter element (1) in special tool 11 9 250.

Installation

Coat O-ring with engine oil.

Scheme 783

Screw in special tool 11 9 250 with a filter element.

Secure special tool 13 6 051 with a sealing ring to special tool.

Start engine and check engine oil pressure.

Specified values See OIL PUMP WITH STRAINER AND DRIVE N53, N52K/B30 or OIL PUMP WITH STRAINER AND DRIVE N53, N52K/B25 .

Scheme 784

Assemble engine.

11 41 010 Removing and installing/replacing chain module for oil pump/vacuum pump (N52K)

Necessary preliminary tasks

1. Remove «CYLINDER HEAD COVER»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-12-000-removing-and-installingsealing)
2. Remove «OIL SUMP»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-13-000-removing-and-installing)
3. Remove «DRIVE BELT»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-28-010-replacing-alternator-drive)
4. Remove drive belt «TENSIONER»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-28-020-replacing-tensioning-device)
5. Remove «VIBRATION DAMPER»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-23-010-removing-and-installingreplacing)
6. Remove «SEALING COVER»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-14-010-replacing-sealing-cover) for vacuum pump

Procedure on installed engine

Turn sprocket (3) with central bolt at crankshaft into position until special tool 11 0 290 can be secured.

Simultaneously secure special tool 11 0 290 to sprocket (3) and special tool 11 4 362.

Release screw (2) for sprocket (3).

Tightening torque 11 66 2AZ .

Scheme 785

Press timing chain with chain tensioner (1) in direction of arrow.

Disconnect timing chain with special tool 11 4 120.

Feed out sprocket (3) at hexagon head (4) of vacuum pump.

Installation

If the chain module is replaced, a mounting bar (2) is already pre-installed.

Scheme 786

Note. To release bolt (1), insert a 6 mm drill bit between sprocket and oil pump housing.

Release screw (1) for sprocket.

Tightening torque 11 41 6AZ .

Release screws (2) for chain module.

Tightening torque 11 41 5AZ .

Installation

Replace aluminum screws.

Secure crankshaft and camshaft with special tools 11 0 300 and 11 4 280 (refer to Checking TIMING ).

Screw special tool 11 9 280 onto hub of vibration damper.

Release central screw (1).

Tightening torque 11 21 1AZ .

Installation

Replace central bolt (1).

Remove hub (2) towards front.

Installation

Replace CRANKSHAFT RADIAL SEAL at front.

Open screw plug on bedplate.

Tightening torque 11 11 8AZ .

Scheme 787

Release aluminum screw (1) with special tool 11 8 640 .

Tightening torque 11 41 4AZ .

Installation

Replace aluminum screws.

Scheme 788

Remove chain module (1) in direction of arrow.

Scheme 789

Procedure on removed engine

Note. Engine is mounted on special tool 11 4 440 .

Release screw (1) for sprocket.

Tightening torque 11 66 2AZ .

Release screw (2) for sprocket.

Tightening torque 11 41 6AZ .

Release central bolt (3).

Scheme 790

Tightening torque 11 21 1AZ .

Installation

Mark central bolt (3) with a colored dot.

Replace central bolt (3).

Remove hub (4) towards front.

All

Install hub with new central bolt.

Tighten down special tool 11 5 200 with screws (1) to hub.

Do not remove special tools 11 0 300 and 11 4 280.

Remove TENSIONER for drive belt.

Screw in special tool 11 4 362 from special tool set 11 4 360.

Mount special tool 11 9 280 on 11 5 200.

Support special tool 11 9 280 on special tool 11 4 362.

Special tool 11 0 300 secures crankshaft.

Tighten central bolt to jointing torque.

Tightening torque 11 21 1AZ .

Mark central bolt and hub with paint.

Mark special tools with colored line (1).

See picture.

If necessary, tighten central bolt to angle of rotation with special tool 00 9 140.

Tightening torque 11 21 1AZ .

Installation

Replace CRANKSHAFT RADIAL SEAL at front.

Assemble engine.

Necessary preliminary tasks

1. Remove front «UNDERBODY PROTECTION»(/bmw/z4/e89-2009-2013/remont/axle-shafts/#front-axle-repair__51-47-490-removing-and-installingreplacing)
2. Have a cleaning cloth ready to catch escaping oil

Detach plug (1) from hydraulic valve (2).

Release screw (1) and remove hydraulic valve (2).

Tightening torque

Replace O-ring (1).

11 41 000 Removing and installing/replacing oil pump (N52K)

Necessary preliminary tasks

1. Remove «OIL SUMP»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-13-000-removing-and-installing)

Release screws (1).

Tightening torque 11 41 1AZ .

Installation

Replace aluminum screws.

Remove intake pipe (2) in direction of arrow.

Installation

Replace sealing ring.

Note. To release bolt (1), insert a 6 mm drill bit between sprocket wheel and oil pump housing.

Release bolt (1).

Tightening torque 11 41 6AZ .

Release screws (2).

Tightening torque 11 41 5AZ .

Installation

Replace aluminum screws.

Release screws (1).

Tightening torque 11 41 2AZ .

Tightening torque 11 41 3AZ .

Installation

Replace aluminum screws.

Detach sprocket wheel (1) in direction of arrow.

Note. Chain tensioner presses timing chain (3) upwards.

Do not remove sprocket wheel (1).

Remove oil pump (2) in direction of arrow.

Installation

Check spacers (1) for secure seating and damage; replace if necessary.

Align twin surface (3) on oil pump (2) to sprocket wheel (4).

Install oil pump (2).

Assemble engine.

11 42 020 Removing and installing/replacing fullflow oil filter (N52)

Recycling

Catch and dispose of drained coolant.

Observe country-specific waste-disposal regulations.

Necessary preliminary tasks

1. Drain «COOLANT»(/bmw/z4/e89-2009-2013/remont/cooling-system-mechanical/#cooling-system-repair-n52__17-00-008-draining-and-adding) .
2. Remove intake air «MANIFOLD»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-61-050-removing-and-installing) .
3. Unfasten oil filter cover.
4. Protect drive belt against dirt.

Release screw (1).

Tightening torque: 11 42 2AZ.

Scheme 791

Unfasten screws (2).

Note. Have cleaning cloth ready to catch residual oil.

Tightening torque: 11 42 2AZ.

Installation

Replace all seals.

If necessary, replace filter element.

Assemble engine.

Note. Protect drive belt against dirt.

Installation

VENTING INSTRUCTIONS must be observed without fail.

11 51 000 Removing and installing/replacing water pump (N52K)

Recycling

Catch and dispose of drained coolant in a suitable container.

Observe country-specific waste-disposal regulations.

Protect plug connections against coolant and contamination.

Cover plug connections with suitable materials.

Necessary preliminary tasks

1. Remove «COOLANT THERMOSTAT»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-53-000-removing-and-installingreplacing)
2. Remove front right «CROSS STRUT»(ref-381258-S39619657532010122800000) ( E89 only )

Loosen hose clamps (1).

Remove coolant hose.

Tightening torque 11 53 5AZ .

Unfasten hose clip (2).

Remove coolant hose.

Tightening torque 11 53 3AZ .

Disconnect plug connection (4).

Release screws (3).

Tightening torque 11 53 1AZ .

Release screws (5).

Tightening torque 11 51 1AZ .

Installation

Replace aluminum screws.

Scheme 792

Installation

If the electric water pump is reused, it must be rotated one turn due to the breakaway torque at the blade wheels.

Assemble engine.

VENTING INSTRUCTIONS must be observed without fail .

11 53 000 Removing and installing/replacing coolant thermostat (N52K)

Recycling

Catch and dispose of drained coolant in a suitable collecting vessel.

Observe country-specific waste disposal regulations.

Necessary preliminary work

1. Remove «FRONT UNDERBODY PROTECTION»(/bmw/z4/e89-2009-2013/remont/axle-shafts/#front-axle-repair__51-47-490-removing-and-installingreplacing)
2. Release «ANTI-ROLL BAR ON FRONT AXLE»(/bmw/z4/e89-2009-2013/remont/axle-shafts/#front-axle-repair__31-35-000-removing-and-installingreplacing) (E89 only)
3. Remove «FAN COWL»(/bmw/z4/e89-2009-2013/remont/cooling-system-mechanical/#cooling-system-repair-n52__17-11-035-removing-and-installingreplacing) (only E89, E70)

Note. E89 only

Release screws (1) (only on front axle support)

Tightening torque 17 10 5AZ .

Scheme 793

Note. Illustration shows coolant thermostat removed.

Disconnect coolant hoses (arrows) on the thermostat (1) with clamping tongs.

Scheme 794

Note. For a better overview, the picture and text refer to the component when removed.

Unfasten hose clamp (1).

Tightening torque 11 53 5AZ .

Remove coolant hose.

Unfasten hose clamp (2).

Tightening torque 11 53 6AZ .

Remove coolant hose.

Unlock and detach coolant hose (3).

Unlock and detach coolant hose (4).

Scheme 795

Disconnect plug connection (5).

Release screws (6).

Tightening torque 11 53 1AZ .

Remove coolant thermostat (7).

Assemble engine.

FILL THE COOLING SYSTEM .

CHECK THE COOLING SYSTEM FOR TIGHTNESS AND FUNCTION.

11 61 050 Removing and installing air intake manifold (N52K)

Necessary preliminary tasks

1. Remove «TENSION STRUT»(/bmw/z4/e89-2009-2013/remont/axle-shafts/#front-axle-repair__51-71-371-removing-and-installingreplacing)
2. Remove «INTAKE FILTER HOUSING»(/bmw/z4/e89-2009-2013/remont/fuel-system/#fuel-system-repair-n52__13-71-000-removing-and-installingreplacing)
3. Remove «IGNITION COIL COVER»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__11-00-removing-and-installingreplacing-acoustic)

Open holder (2).

Disconnect plug connection (1) under of air intake manifold.

Release both crankcase breathers (3).

Scheme 796

Disconnect plug connection (1).

Disconnect plug connection (3).

Release screws (4).

Detach engine wiring harness (2) from air intake manifold and lay to one side.

Scheme 797

Disconnect plug connection (1) on oil pressure switch (2).

Scheme 798

Release fuel rail (2) and lay to one side.

Note. Do not detach fuel line.

Release screws (1).

Tightening torque 11 61 1AZ .

Unscrew nuts (3).

Tightening torque 11 61 2AZ .

Scheme 799

Raise air intake manifold approx. 10 cm.

Disconnect plug connections (1) at bottom.

Release tank vent line behind throttle valve assembly.

Scheme 800

Installation

Replace all seals.

Assemble engine.

18 40 050 Removing and installing/replacing front exhaust manifold (N52K)

Necessary preliminary tasks

1. Remove «REAR EXHAUST MANIFOLD»(/bmw/z4/e89-2009-2013/remont/mechanical/#engine-repair-n52__18-40-060-removing-and-installingreplacing)
2. Drain off «AIR CONDITIONING SYSTEM»(/bmw/z4/e89-2009-2013/remont/automatic-hvac-system/#heating-and-air-conditioning-repair__64-50-010-drawing-off-evacuating)

Note. The oxygen sensors are in danger of being damaged when the exhaust manifolds are removed and installed.

Remove CONTROL SENSOR from cylinders 1 to 3.

Remove MONITOR SENSOR from cylinders 1 to 3.

Release screws (1).

Tightening torque 64 52 1AZ .

Detach pressure and suction lines from A/C compressor.

Installation

Replace all sealing rings and moisten with refrigerant oil.

Scheme 801

Unscrew nuts.

Remove exhaust manifold (1).

Installation

Clean sealing faces and replace seals.

Replace nuts.

Tightening torque 18 40 1AZ .

Scheme 802

Assemble engine.

Evacuate and fill A/C SYSTEM .

Check exhaust system for leaks.

18 40 060 Removing and installing/replacing rear exhaust manifold (N52K)

Necessary preliminary tasks

1. Remove right «TENSION STRUT»(/bmw/z4/e89-2009-2013/remont/axle-shafts/#front-axle-repair__51-71-371-removing-and-installingreplacing)
2. Remove front «UNDERBODY PROTECTION»(/bmw/z4/e89-2009-2013/remont/axle-shafts/#front-axle-repair__51-47-490-removing-and-installingreplacing)
3. Remove rear «UNDERBODY PROTECTION»(/bmw/z4/e89-2009-2013/remont/axle-shafts/#rear-axle-repair__51-47-491-removing-and-installingreplacing)
4. Remove «COMPLETE EXHAUST SYSTEM»(/bmw/z4/e89-2009-2013/remont/exhaust/#exhaust-system-repair-n52__18-00-020-removing-and-installing)

Note. The oxygen sensors are in danger of being damaged when the exhaust manifolds are removed and installed.

Remove CONTROL SENSOR from cylinders 4 to 6.

Remove MONITOR SENSOR from cylinders 4 to 6.

Unscrew nuts.

Remove exhaust manifold (1).

Installation

Clean sealing faces and replace seals.

Replace nuts.

Tightening torque 18 40 1AZ .

Scheme 803

Assemble engine.

Check exhaust system for leaks.

11 66 000 Removing and installing or replacing vacuum pump (N52)

Necessary preliminary work

1. Remove drive belt.
2. Remove belt tensioner for drive belt.
3. Remove sealing cap for vacuum pump.
4. Remove intake plenum.

Rotate crankshaft at central bolt.

Rotate camshaft sprocket (3) until drilled holes and screws (1) match up.

Screw in special tool 11 4 362.

Secure special tool 11 0 290 in sprocket (3) and on special tool 11 4 362.

Release screw (2).

Tightening torque: 11 66 2AZ

Release screws (1) and secure against falling out.

Tightening torque: 11 66 1AZ .

Remove vacuum pump towards rear.

Installation note: Replace gasket.

Press chain tensioner with chain (1) in direction of arrow.

Insert special tool 11 4 120.

Remove special tool 11 0 290.

Remove camshaft sprocket (2) in direction of arrow.

Scheme 804

11 78 513 Replacing both lambda oxygen control sensors (N52K)

Installation

The threads of new lambda control sensors are already coated with Never Seez Compound (refer to BMW Parts Department).

If a lambda control sensor is to be reused, apply a thin and even coating of Never Seez compound to the thread only.

The part of the lambda control sensor which projects into the exhaust system branch (sensor ceramics) must not be cleaned and not coated with lubricant.

Lambda control sensor, cylinder nos. 1 to 3

Note. The lambda control sensor on the exhaust manifold of cylinder nos. 1 to 3 is accessible from above. Disconnect plug connection. Unclip the cable from the retainer. Release lambda control sensor on exhaust manifold of cylinder nos. 1 to 3 with special tool 11 7 020.

Lambda control sensor, cylinder nos. 4 to 6

Note. The lambda control sensor on the exhaust manifold of cylinder nos. 4 to 6 is accessible from above.

Disconnect plug connection.

Unclip the cable from the retainer.

Release screws (1) on retaining plate.

Remove retaining plate (3).

Release lambda control sensor (2) on exhaust manifold of cylinder nos. 4 to 6 with special tool 11 7 020.

Scheme 805

All

Installation

Cable color of lambda control sensor, cylinders nos. 1 to 3 = black.

Cable color of lambda control sensor, cylinders nos. 4 to 6 = grey.

Tightening torque 11 78 1AZ .

Assemble engine.

Check function of DME.

11 78 613 Replacing both lambda oxygen monitoring sensors (N52K)

Necessary preliminary tasks

1. Remove rear «UNDERBODY PROTECTION»(/bmw/z4/e89-2009-2013/remont/axle-shafts/#rear-axle-repair__51-47-491-removing-and-installingreplacing) .

Installation

The threads of new lambda monitoring sensors are already coated with Never Seez Compound (refer to BMW Parts Department).

If a lambda monitoring sensor is to be reused, apply a thin and even coating of Never Seez Compound to the thread only.

The part of the lambda monitoring sensor which projects into the exhaust system branch (sensor ceramics) must not be cleaned and not coated with lubricant.

Disconnect plug connection for oxygen monitoring sensor.

Release and tighten lambda monitoring sensor (1) on exhaust manifold of cylinder nos. 1 to 3 with special tool (2) 11 9 150.

Tightening torque 11 78 1AZ .

Installation

Cable color of lambda monitoring sensor (1), cylinders nos. 1 to 3 = black.

Scheme 806

Disconnect plug connection for oxygen monitoring sensor.

Release and tighten lambda monitoring sensor (1) on exhaust manifold of cylinder nos. 4 to 6 with special tool (2) 11 9 150.

Tightening torque 11 78 1AZ .

Installation

Cable color of lambda monitoring sensor (1), cylinders nos. 4 to 6 = grey.

Scheme 807

Assemble engine.

Check function of DME.

See also:
• 11 42 1AZ
• ENGINE OIL
• BATTERY NEGATIVE LEAD
• INTAKE FILTER HOUSING
• FAN COWL
• RADIATOR
• CONDENSER
• EXHAUST SYSTEM
• 2300017 REMOVING AND INSTALLING TRANSMISSION (GS6-17BG) N52K
• 2400030 REMOVING AND INSTALLING AUTOMATIC TRANSMISSION (6HP19Z) N52K
• STEERING SPINDLE
• 64 52 1AZ
• 22 11 2AZ
• COOLANT
• 11 4 420
• IGNITION COILS
• IGNITION WIRING HARNESS
• TENSION STRUT
• LOWER FRONT AXLE
• 2211100 REPLACING RIGHT ENGINE SUPPORT ARM (N52K)
• 2211110 REPLACING LEFT ENGINE SUPPORT ARM (N52K)
• 11 8 640
• UNDERBODY PROTECTION
• 11 4 050
• VENTING INSTRUCTIONS
• GENERAL NOTES
• ANTI-ROLL BAR ON FRONT AXLE
• 17 10 5AZ
• CHECK THE COOLING SYSTEM FOR TIGHTNESS AND FUNCTION.
• 6450... INSTRUCTIONS FOR HANDLING REFRIGERANT R 134A
• 6450... SAFETY INSTRUCTIONS FOR HANDLING REFRIGERANT R134A
• INSTRUCTIONS
• DESICCANT INSERT
• AIR CONDITIONING SYSTEM
• 18 40 1AZ
• UNDERBODY PROTECTION
• 11 66 2AZ
• DANGER OF POISONING
• RISK OF INJURY
• CYLINDER HEAD
• CYLINDER HEAD
• ENGINE OIL
• 1840060 REMOVING AND INSTALLING/REPLACING REAR EXHAUST MANIFOLD (N52K)
• 1840050 REMOVING AND INSTALLING/REPLACING FRONT EXHAUST MANIFOLD (N52K)
• INTAKE PLENUM
• INTAKE AND EXHAUST CAMSHAFT ADJUSTERS
• CYLINDER HEAD GASKET
• DEVIATION FROM FLATNESS
• WATER LEAKS
• EXHAUST CAMSHAFT
• INTERMEDIATE LEVER
• FLYWHEEL
• VIBRATION DAMPER
• DRIVE BELT
• DRIVE BELT TENSIONER
• CRANKSHAFT
• ENGINE
• OIL SUMP
• OIL PUMP
• CHAIN MODULE
• CHAIN MODULE
• PISTONS
• BEARING SHELLS
• CRANKSHAFT RADIAL SEAL
• CRANKSHAFT RADIAL SEAL
• PRIMER 1.3 AND LIQUID GASKET 1.4
• PISTON RINGS
• CONNECTING ROD BEARING SHELLS
• CYLINDER HEAD COVER
• VALVE TIMING
• CAM FOLLOWERS
• CHAIN TENSIONER
• TIMING
• ECCENTRIC SHAFT
• INLET CAMSHAFT
• VALVE SPRINGS
• VALVES
• HYDRAULIC VALVE
• CHECKING ENGINE OIL PRESSURE
• ACOUSTIC COVER
• SEALING COVER
• COOLANT THERMOSTAT
• CONTROL SENSOR
• MONITOR SENSOR