Engine - Repair (n52) BMW X5 E70

Engine identification

Drive in engine numbers at marked surface with impact tool.

M47 / M47TU / M47T2

Scheme 110

M57 / M57TU / M57T2

Scheme 111

M67 / M67TU

Scheme 112

N47

Scheme 113

M52 / M52TU

Scheme 114

M54

Scheme 115

M56

Scheme 116

N40 / N45

Scheme 117

N42 / N46 / N46T

Scheme 118

N51 / N52 / N52K / N53 / N54

Scheme 119

N62

Scheme 120

N73

Scheme 121

S54

Scheme 122

S85

Scheme 123

W10 / W11

Scheme 124

W17

Scheme 125

Assemble engine.

Mounting engine on assembly stand (N52K)

Special tools required

1. «00 1 450 ASSEMBLY STAND»(ref-202720-S35683900752005102800000)
2. 11 3 370
3. 11 4 440
4. 11 9 261
5. 11 9 265

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 126

00 00 250 BMW engine oil service including supplementary service (N52K)

Special tools required

1. 11 9 240

Only the engine oil service will be described in these repair instructions.

The supplementary service is made up of the following operations which must be taken from the relevant repair instructions

1. Reset service interval indicator according to factory specification, see «00 00 ... RESETTING SERVICE INTERVAL INDICATOR ACCORDING TO FACTORY SPECIFICATIONS»(ref-264486-S02455660042007091500000) .
2. Replace microfilter for interior ventilation
3. Check brake lining thickness, see «34 00 010 CHECKING THICKNESS OF BRAKE PAD»(ref-264504-S18346473892007091500000) .
4. Adjust handbrake/parking brake, see «34 10 014 ADJUSTING HANDBRAKE»(ref-264504-S07293101442007091500000) .
5. Parking brake function check

The alternator must therefore be covered with suitable apparatus.

Recycling

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

Observe country-specific waste-disposal regulations.

Note. Adhere to the following work steps in sequence: Open oil filter cap. Release screw plug in oil sump.

Note. Picture shows the E93 by way of example. Other model series may differ in certain details.

Release oil filter cap with special tool 11 9 240 .

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

Scheme 127

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

Installation

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

Installation

Moisten sealing rings (2) with engine oil.

Tightening torque: 11 42 1AZ, see 11 42 OIL FILTER ELEMENT WITH CONNECTIONS .

Scheme 128

Note. For purposes of clarity, the picture shows the assembly underside protection and reinforcement plate removed.

Unclip service opening on reinforcement plate.

Open screw plug (1) in oil sump.

Drain engine oil.

Installation

Replace sealing ring.

Tightening torque: 11 13 1AZ, see 11 13 OIL PAN .

Pour in engine oil.

Scheme 129

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

Turn off engine.

Check oil filter cap and screw plug (1) 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

11 00 Removing and installing/replacing ignition coil cover (N52K)

Release screws.

Tightening torque: 11 12 6AZ, see 11 12 CYLINDER HEAD WITH CYLINDER HEAD COVER .

Remove ignition coil cover (1).

Scheme 130

11 00 670 Securing engine in installation position (N52)

Special tools required

1. «00 0 200 CROSS MEMBER»(ref-202720-S06782589052005102800000)
2. 00 0 202
3. 00 0 204
4. 00 0 208
5. 11 0 000

Necessary preliminary tasks

1. Secure engine bonnet/hood in service position, see «51 00 ... SERVICE POSITION OF ENGINE HOOD/BONNET (X3)»(ref-264509-S01183822762007091500000) or «51 00 ... SERVICE POSITION OF ENGINE HOOD/BONNET 9X5)»(/bmw/x5/e70-2006-2010/remont/door-locks-anti-theft-systems/#body-equipment-repair__51-00-service-position-of) .
2. Remove cover for windscreen cowl panel, see «51 13 115 REMOVING AND INSTALLING/REPLACING COWL PANEL COVER (X3)»(ref-264509-S20402278472007091500000) or «51 13 116 REMOVING AND INSTALLING/REPLACING COWL PANEL COVER (X5)»(/bmw/x5/e70-2006-2010/remont/door-locks-anti-theft-systems/#body-equipment-repair__51-13-116-removing-and-installingreplacing) .
3. Remove microfilter housing
4. Remove tension strut on spring strut dome, see «51 71 373 REMOVING AND INSTALLING/REPLACING TENSION STRUT ON SPRING STRUT DOME (X3)»(ref-264509-S32368375752007091500000) or «51 71 372 REMOVING AND INSTALLING/REPLACING BOTH TENSION STRUTS ON SPRING STRUT DOMES (X5)»(/bmw/x5/e70-2006-2010/remont/door-locks-anti-theft-systems/#body-equipment-repair__51-71-372-removing-and-installingreplacing) .
5. Remove acoustic cover
6. Remove intake filter housing with rubber gaiter, see «13 71 000 REMOVING AND INSTALLING/REPLACING INTAKE FILTER HOUSING (N52K) (X3)»(ref-264491-S18207133492007091500000) or «13 71 000 REMOVING AND INSTALLING/REPLACING INTAKE FILTER HOUSING (N52K) (X5)»(/bmw/x5/e70-2006-2010/remont/fuel-system/#fuel-system-repair-n52__13-71-000-removing-and-installingreplacing) .

Assemble cross member 00 0 200 with special tools 00 0 202 , 00 0 204 , 00 0 208 .

Scheme 131

Note. Use towing hook (72 15 8 108 670).

Scheme 132

Cut open cable tie (2).

Detach quick-release fastener (1) and place vent line (3) to one side.

Installation

Make sure the quick-release fastener is fitted correctly.

Scheme 133

Screw in towing hook (2) and tighten down to approx. 30 Nm.

Secure special tool 11 0 000 to spindle 00 0 202 .

Fit suitable chains to special tool 11 0 000 and attach to towing hook (2) or engine lifting eye.

Scheme 134

Unscrew nuts (1).

Raise engine approx. 10 mm with cross member.

Installation

Replace self-locking nuts.

Tightening torque: 22 11 2AZ, see 22 11 ENGINE SUSPENSION .

Scheme 135

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

Necessary preliminary tasks

1. Remove ignition coils. See «12 13 511 REPLACING IGNITION COIL (N52, N52K, N51)»(/bmw/x5/e70-2006-2010/remont/gauges-instrument-panels/#engine-electrical-system-repair-n52__12-13-511-replacing-ignition-coil) .
2. Release ignition wiring harness in cylinder head cover area. See «12 51 100 REPLACING WIRING HARNESS SECTION FOR IGNITION COIL (N52K)»(/bmw/x5/e70-2006-2010/remont/gauges-instrument-panels/#engine-electrical-system-repair-n52__12-51-100-replacing-wiring-harness) .
3. Remove tension strut.

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, see 11 37 3AZ in 37 VARIABLE VALVE GEAR .

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

Scheme 136

Release screw on electric servomotor. Tightening torque, see 11 37 3AZ in 37 VARIABLE VALVE GEAR . Remove servomotor (4) in direction of arrow. If necessary, release nuts (5). Tightening torque, see 11 72 1AZ in 72 AIR PUMP, LINES AND CONTROL VALVE . If necessary, remove secondary air valve (6).

Scheme 137

Release screws in area (1). Tightening torque, see 11 12 5AZ in 12 CYLINDER HEAD WITH COVER . Installation: Replace aluminum screws.

Release threaded pin (2). Tightening torque, see 11 12 5AZ in 12 CYLINDER HEAD WITH COVER . Installation: Replace aluminum screws.

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

Scheme 138

Installation: Clean all sealing faces (1 and 2).

Scheme 139

Installation: Replace gaskets (1 and 2).

Assemble engine.

11 12 100 Removing and installing cylinder head (N52K)

Special tools required

1. 11 0 320
2. 11 4 420
3. 11 4 430
4. 11 4 471
5. 11 4 472
6. 11 8 580

Necessary preliminary tasks

1. Remove exhaust system, see «EXHAUST SYSTEM COMPLETE»(ref-202780-S28948719632005102900000) .
2. Drain coolant, see «17 00 005 DRAINING AND ADDING COOLANT IN RADIATOR (N52K) (X5)»(/bmw/x5/e70-2006-2010/remont/cooling-system-mechanical/#cooling-system-repair-n52-n62__17-00-005-draining-and-adding) or «17 00 005 DRAINING AND ADDING COOLANT (N52K) (X3)»(ref-264493-S06094612532007091500000) .
3. Drain off engine oil
4. Remove both exhaust manifolds
5. Remove intake air manifold
6. Detach coolant hoses from cylinder head
7. Remove inlet and exhaust adjustment unit

Risk of corrosion and cracking!

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 140

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

Remove eccentric shaft sensor (1) towards front.

Scheme 141

Release screw (1).

Remove magnet wheel (2) towards front.

Scheme 142

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

Scheme 143

Pretension eccentric shaft (1) upwards in direction of arrow.

Remove stop screw between 1st and 2nd cylinders.

Tightening torque: 11 37 5AZ, see 11 37 VARIABLE VALVE GEAR .

Scheme 144

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

Release screw (2).

Tightening torque: 11 12 3AZ, see 11 12 CYLINDER HEAD WITH CYLINDER HEAD COVER .

Release screws (1).

Tightening torque: 11 12 4AZ, see 11 12 CYLINDER HEAD WITH CYLINDER HEAD COVER .

Installation

Replace aluminum screws.

Scheme 145

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

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

Note. Picture shows inlet and exhaust camshafts removed.

Scheme 146

Release M9 cylinder head bolts (1 and 3) with special tool 11 4 420 .

Tightening torque: 11 12 2AZ, see 11 12 CYLINDER HEAD WITH CYLINDER HEAD COVER .

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

Tightening torque: 11 12 1AZ, see 11 12 CYLINDER HEAD WITH CYLINDER HEAD COVER .

Scheme 147

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

Tightening torque: 11 12 5AZ, see 11 12 CYLINDER HEAD WITH CYLINDER HEAD COVER .

Scheme 148

Insert special tool 11 4 430 into bores.

Scheme 149

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

Scheme 150

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

Risk of corrosion and cracking!

Clean all pocket holes.

Replace cylinder head gasket.

Scheme 151

Fit new cylinder head screws.

Insert cylinder head bolts (1 to 10) with special tool 11 8 580 .

Tightening torque: 11 12 1AZ, see 11 12 CYLINDER HEAD WITH CYLINDER HEAD COVER .

Insert cylinder head bolts (11 to 14) with special tool 11 4 420 .

Tightening torque: 11 12 2AZ, see 11 12 CYLINDER HEAD WITH CYLINDER HEAD COVER .

Note. Picture shows inlet and exhaust camshafts removed.

Scheme 152

Observe sequence for tightening cylinder head bolts without fail.

Installation

1. Jointing torque: All cylinder head bolts 1 to 14 to 30 Nm
2. 1st angle of rotation: All cylinder head bolts 1 to 14 to 90°
3. 2nd angle of rotation: Only cylinder head bolts 1 to 10 to 90°
4. 3rd angle of rotation

All cylinder head bolts 1 to 14 to 45°

Insert bolts (1).

Tightening torque: 11 12 4AZ, see 11 12 CYLINDER HEAD WITH CYLINDER HEAD COVER .

Insert bolt (2).

Tightening torque: 11 12 3AZ, see 11 12 CYLINDER HEAD WITH CYLINDER HEAD COVER .

Installation

Replace aluminum screws.

Assemble engine.

11 12 101 Replacing cylinder head gasket (N52K)

Special tools required

1. 11 4 430
2. 11 4 470

Necessary preliminary tasks

1. Remove cylinder head, see «11 12 100 Removing and installing cylinder head (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-12-100-removing-and-installing) .

Insert special tool 11 4 430 into bores.

Remove cylinder head seal.

Remove remnants of oil and dirt from pocket holes (1).

Scheme 153

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

Scheme 154

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

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

Scheme 155

Note. Check cylinder head for deviation from flatness, see 11 12 719 Resurfacing cylinder head sealing face (N52K) . Check cylinder head for water leaks, see 11 12 729 Checking cylinder head for water leaks (N52K) .

Assemble engine.

11 12 719 Resurfacing cylinder head sealing face (N52K)

Necessary preliminary tasks

1. Remove cylinder head, see «11 12 100 Removing and installing cylinder head (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-12-100-removing-and-installing) .
2. Remove exhaust camshaft, see «11 31 028 Removing and installing/replacing exhaust camshaft (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-31-028-removing-and-installingreplacing) .
3. Remove intermediate lever on inlet side, see «11 37 010 Removing and installing/replacing intermediate levers (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-37-010-removing-and-installingreplacing) .

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

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

Scheme 156

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

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

Scheme 157

Check cylinder head for water leaks, see 11 12 729 Checking cylinder head for water leaks (N52K) .

Assemble engine.

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

Special tools required

1. 11 4 341
2. 11 4 342
3. 11 4 344
4. 11 4 345

Necessary preliminary tasks

1. Remove cylinder head, see «11 12 100 Removing and installing cylinder head (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-12-100-removing-and-installing) .
2. Disassemble cylinder head, see «11 34 560 Replacing all valve stem seals (N52K)»(/bmw/x5/e70-2006-2010/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 158

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

Installation

Cylinder no. 1 is marked.

Scheme 159

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

Sealing flange must rest flat.

Scheme 160

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 161

Assemble engine.

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

Necessary preliminary tasks

1. Lower front axle, see «31 11 506 LOWERING/RAISING FRONT AXLE CARRIER (X3)»(ref-264501-S16588934492007091500000) or «31 11 506 LOWERING/RAISING FRONT AXLE CARRIER (UNIVERSAL LIFTER) (X5)»(/bmw/x5/e70-2006-2010/remont/axle-shafts/#front-axle-repair__31-11-506-loweringraising-front-axle)
2. Remove front differential, see «31 50 001 REMOVING AND INSTALLING/REPLACING FRONT DIFFERENTIAL (X3)»(ref-264501-S25673178452007091500000) or «31 50 001 REMOVING AND INSTALLING/REPLACING FRONT DIFFERENTIAL (X5)»(/bmw/x5/e70-2006-2010/remont/axle-shafts/#front-axle-repair__31-50-001-removing-and-installingreplacing) .

Release screw (1) from grounding cable (2) on right bearing block (3).

Lay grounding cable (2) to one side.

Scheme 162

Note. Picture shows an E92 by way of example. Other model series may differ in certain details.

Unclip electric leads (2) of oxygen monitor sensors from holder (3).

Disconnect plug connections (1) of oxygen monitor sensors and lay to one side.

Release bolts (5) on transmission.

Tightening torque: 11 13 5AZ, see 11 13 OIL PAN .

Disconnect plug connection (4) on oil level sensor.

Lay holder (3) to one side.

Scheme 163

For vehicles with optional extra SA205 (automatic transmission)

Note. Transmission fluid cooler lines (2) (supply and return) are secured to the oil sump with two holders (3).

If necessary, release oil pump and lay to one side.

Unscrew nuts (1).

Tightening torque: 11 13 6AZ, see 11 13 OIL PAN .

Release holders (3) with transmission fluid cooler lines (2) from oil sump guides.

Scheme 164

For all vehicles

Note. For purposes of clarity, the picture shows the front axle carrier and stabilizer bar removed.

Unscrew nut (3).

Tightening torque: 11 13 7AZ, see 11 13 OIL PAN .

Release screw (2).

Tightening torque: 11 13 8AZ, see 11 13 OIL PAN .

Release both holders with coolant hose (1) from oil sump guide.

Scheme 165

Release bolts along line (1).

Tightening torque: 11 13 2AZ, see 11 13 OIL PAN .

Tightening torque: 11 13 3AZ, see 11 13 OIL PAN .

Installation

Replace aluminum screws.

If necessary, remove oil level sensor (2) and right bearing block (3).

Scheme 166

Installation

Replace all seals.

Assemble engine.

11 14 005 Replacing front crankshaft radial seal (N52K)

Special tools required

1. 11 9 221
2. 11 9 222
3. 11 9 223
4. 11 9 224
5. 11 9 231
6. 11 9 232
7. 11 9 233

Necessary preliminary tasks

1. Remove «VIBRATION DAMPER»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52)

Scheme 167

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 168

Insert screws (special tool 11 9 223 ) and screw in until they make contact without play.

Scheme 169

Remove screws (special tool 11 9 224 ).

Scheme 170

Insert screw (special tool 11 9 222 ) carefully and slowly withdraw crankshaft radial seal (1).

Scheme 171

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 172

Note. Support bushing (1) is contained in scope of delivery of crankshaft radial seal (2). When crankshaft radial seal (2) is installed, only support bushing (1) may be used as a slip bushing.

Crankshaft radial seal (2) has a groove on both left and right sides.

Scheme 173

Attach support bushing (2) with crankshaft radial seal (1).

Push on crankshaft radial seal (1) in direction of arrow.

Scheme 174

Pay attention to opening on crankshaft radial seal (1) on left and right.

Remove support bushing (2).

Scheme 175

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

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 176

Fit special tool 11 9 232 .

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

Scheme 177

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

Scheme 178

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 179

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

Scheme 180

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 14 010 Replacing sealing cover for vacuum pump (N52K)

Special tools required

1. 11 4 361
2. 11 4 362
3. 11 4 363
4. 11 4 364
5. 11 9 200

Necessary preliminary tasks

1. Remove fan cowl with electric fan
2. Remove alternator drive belt
3. Remove drive belt tensioner

Note. The procedure is the same as for the crankshaft radial seal. Expose removal openings on sealing cover.

Scheme 181

Convert special tool 11 9 200 (see illustration).

Screw special tool 11 9 200 onto sealing cover.

Note. Insert screws until flush only with special tool 11 9 200 .

Scheme 182

Screw in special tool 11 4 362 .

Scheme 183

Attach special tool 11 4 361 to bedplate construction screw connection (see arrow).

Secure with knurled screw (1).

Screw special tool 11 4 364 into special tool 11 9 200 and screw out in direction of arrow.

Note. For purposes of clarity, the picture shows the alternator and power steering pump removed.

Scheme 184

Prepare new sealing cover (1) with special tool 11 9 200 without screws.

Screw in sealing cover with special tool 11 4 363 until it is flush.

Scheme 185

Assemble engine.

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

Special tools required

1. 11 9 181
2. 11 9 182
3. 11 9 183
4. 11 9 184
5. 11 9 200

Necessary preliminary tasks

1. Remove transmission
2. Remove flywheel, see «11 22 500 Removing and installing/replacing flywheel (N52K)»(/bmw/x5/e70-2006-2010/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 .

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

Scheme 186

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 187

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 188

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 189

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

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 sleeve (4).

Scheme 190

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

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

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

Scheme 191

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 192

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 193

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

Scheme 194

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 21 500 Replacing crankshaft (N52K)

Special tools required

1. «00 2 510 DIAL GAUGE WITH FEELER»(ref-202720-S30721218722005102800000)
2. «00 9 120 TORQUE ANGLE MEASURING DIAL»(ref-265619-S15001015852007092300000)
3. 11 4 370
4. 11 4 440
5. 11 4 470
6. 11 9 360

Necessary preliminary tasks

1. Remove engine
2. Mount engine on assembly stand, see «Mounting engine on assembly stand (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__mounting-engine-on-assembly-stand-n52k) .
3. Remove «VIBRATION DAMPER»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52)
4. Remove oil sump
5. Remove oil pump, see «11 41 000 Removing and installing/replacing oil pump (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-41-000-removing-and-installingreplacing)
6. Remove oil pump/vacuum pump chain module, see «11 41 010 Removing and installing/replacing chain module for oil pump/vacuum pump (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-41-010-removing-and-installingreplacing)
7. Remove timing chain module, see «11 31 051 Replacing timing chain (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-31-051-replacing-timing-chain)
8. Remove cylinder head, see «11 12 100 Removing and installing cylinder head (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-12-100-removing-and-installing) .
9. Remove flywheel, see «11 22 500 Removing and installing/replacing flywheel (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-22-500-removing-and-installingreplacing)
10. Removing all pistons, see «11 25 530 Removing and installing/replacing all pistons (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-25-530-removing-and-installingreplacing)

Release screws (1).

Tightening torque: 11 13 6AZ, see 11 13 OIL PAN .

Installation

Replace aluminum screws.

Remove oil deflector (2).

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

Scheme 195

Release screws (1).

Tightening torque: 11 11 2AZ, see 11 11 CRANKCASE .

Release screws (2).

Tightening torque: 11 11 3AZ, see 11 11 CRANKCASE .

Installation

Replace aluminum screws.

Scheme 196

Release screws (1).

Tightening torque: 11 11 4AZ, see 11 11 CRANKCASE .

Release screws (2).

Tightening torque: 11 11 2AZ, see 11 11 CRANKCASE .

Installation

Replace aluminum screws.

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

Tightening torque: 11 11 1AZ, see 11 11 CRANKCASE .

Scheme 197

Release screws (1).

Tightening torque: 11 11 3AZ, see 11 11 CRANKCASE .

Installation

Replace aluminum screws.

Lift out bedplate.

Scheme 198

Remove crankshaft (1) in direction of arrow.

Remove bearing shells (2) and guide bearing shell (3), replace if necessary, see 11 21 531 Replacing all main crankshaft bearing shells (N52K) .

Clean all sealing faces with special tool 11 4 470 .

Scheme 199

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

Install all bearing shells, see 11 21 531 Replacing all main crankshaft bearing shells (N52K) .

Installation

Lubricate all bearing points with engine oil.

Note. Picture shows N46.

Scheme 200

Insert crankshaft (1).

Scheme 201

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

Tightening torque: 11 11 1AZ, see 11 11 CRANKCASE .

Tighten screws (2) from inside outwards.

Tightening torque: 11 11 2AZ, see 11 11 CRANKCASE .

Tighten screws (1).

Tightening torque: 11 11 4AZ, see 11 11 CRANKCASE .

Installation

Replace aluminum screws.

Tighten aluminum screws exclusively with special tool 00 9 120 .

Scheme 202

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 .

Scheme 203

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

Installation

Always replace nozzles (1).

Scheme 204

Installation

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

Screw on nozzle (2) for injecting sealing compound.

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

Scheme 205

Replace crankshaft radial seal at front, see 11 14 005 Replacing front crankshaft radial seal (N52K) .

Replace crankshaft radial seal (transmission side), see 11 14 151 Replacing crankshaft radial seal (transmission side) (N52K) .

Assemble engine.

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

No steel screws/bolts may be used due to the threat of electrochemical corrosion.

A magnesium crankcase requires aluminum screws/bolts exclusively.

Aluminum screws/bolts must be replaced each time they are released.

Aluminum screws/bolts are permitted with and without color coding (blue).

For reliable identification

Aluminum screws/bolts are not magnetic.

Risk of damage!

Joining torque and angle of rotation must be observed without fail.

Necessary preliminary tasks

1. Remove ENGINE.
2. Remove CLUTCH (if fitted). See «21 21 500 REMOVING AND INSTALLING/REPLACING CLUTCH (SAC) (X3)»(ref-264494-S02978694992007091500000)
3. Remove left and right engine support arm
4. Remove «OIL SUMP»(/bmw/x5/e70-2006-2010/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

Scheme 206

Release screws (1).

Tightening torque, see 11 13 6AZ in 11 13 OIL PAN .

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, see 11 41 6AZ in 11 41 OIL PUMP WITH STRAINER AND DRIVE .

Scheme 207

Unfasten screws (2).

Tightening torque: see 11 41 5AZ in 11 41 OIL PUMP WITH STRAINER AND DRIVE .

Installation

Replace aluminum screws

Scheme 208

Remove screw plug (1) from crankcase at front.

Note. Replace gasket.

Scheme 209

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 210

Version 1

Release screws (1).

Tightening torque, see 11 41 2AZ in 11 41 OIL PUMP WITH STRAINER AND DRIVE .

Tightening torque, see 11 41 3AZ in 11 41 OIL PUMP WITH STRAINER AND DRIVE .

Installation

Replace aluminum screws

Scheme 211

Version 2

Replace aluminum screws

Scheme 212

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 213

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 214

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 215

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 216

Automatic transmission

Release flywheel bolts (1).

Release special tool (2).

Remove flywheel (3).

Scheme 217

Manual gearbox

Scheme 218

Scheme 219

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

Scheme 220

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 221

Carefully remove radial shaft seal (1).

Catch escaping engine oil with a cloth (2).

Scheme 222

Carefully remove radial shaft seal (1) towards front.

Catch escaping engine oil with a cloth (2).

Scheme 223

Scheme 224

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 225

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

Screw in all M10 crankcase bolts.

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

Scheme 226

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

Scheme 227

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

Tightening torque 11 11 1AZ, see 11 11 CRANKCASE

Insert all crankcase bolts (1).

Tightening torque 11 11 2, 3 and 4AZ, see 11 11 CRANKCASE

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

Note. Replace screw.

Tightening torque, see 11 41 4 AZ in 11 41 OIL PUMP WITH STRAINER AND DRIVE .

Tighten screw plug on front of crankcase.

Tightening torque, see 11 11 8 AZ in 11 11 CRANKCASE .

Installation

Replace sealing ring.

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

Scheme 228

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

Scheme 229

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

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

Scheme 230

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

Scheme 231

Installation

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

Scheme 232

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

Scheme 233

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

Scheme 234

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 235

Scheme 236

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

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

Scheme 237

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

Scheme 238

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 239

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 240

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.

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

Special tools required

1. «00 2 590 PLASTIGAGE (5)»(ref-202720-S20823764342005102800000)
2. 11 4 251
3. 11 4 252
4. 11 4 470

Necessary preliminary tasks

1. Remove crankshaft, see «11 21 500 Replacing crankshaft (N52K)»(/bmw/x5/e70-2006-2010/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, see 11 11 CRANKCASE .

Scheme 241

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

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

Installation

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

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

Scheme 242

Surface (1) for marking.

Seven-digit part number (2).

Bearing classification (3) on bedplate (see table: values of 1/2/3).

Scheme 243

Bearing classification (1) on crankcase (see table: values of A/B/C).

Installation

When all the letters and number code have been determined, the color of the bearing shells must be allocated (see table).

Scheme 244

BEARING SHELL COLOR COMBINATIONS SPECIFICATION

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, see 11 21 500 Replacing crankshaft (N52K) .

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 245

Install bedplate 11 21 500 Replacing crankshaft (N52K) .

Assemble engine.

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

Necessary preliminary tasks

1. Remove clutch.

Remove guide bearing with special tool 11 2 340.

Scheme 246

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

Scheme 247

Assemble engine.

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

Special tools required

1. 11 4 180
2. 11 9 260
3. 11 9 265

Necessary preliminary tasks

1. Remove transmission
2. Remove clutch, see «21 21 500 REMOVING AND INSTALLING/REPLACING CLUTCH (SAC) (X3)»(ref-264494-S02978694992007091500000) or .

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, see 11 22 FLYWHEEL .

Installation

Flywheel (1) is secured with an alignment pin.

Fit new flywheel screws.

Clean all threads for flywheel screws in crankshaft.

Scheme 248

For vehicles without optional extra SA205 (automatic transmission)

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

Installation

Replace aluminum screws.

Release flywheel screws with special tool 11 4 180 .

Tightening torque: 11 22 2AZ, see 11 22 FLYWHEEL .

Installation

Flywheel is secured with a dowel pin.

Fit new flywheel screws.

Clean all threads for flywheel screws in crankshaft.

Assemble engine.

Scheme 249

11 22 513 Replacing roller bearing for dual-mass flywheel

Special tools required

1. 21 2 051
2. 21 2 052

Note. Flywheel removed!

Using hydraulic press (1) and special tool 21 2 051 , press out dual-mass flywheel downwards on engine side.

Scheme 250

Push roller bearing (2) onto special tool 21 2 052 .

Using hydraulic press (1), press roller bearing into dual-mass flywheel as far as it will go on clutch side.

1. Roller bearing must not be driven in.
2. Roller bearing mounting force/travel monitored

Min. 2000N 1 mm before end of pressing in.

Max. 15000N during entire press-in procedure.

Scheme 251

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

Necessary preliminary tasks

1. Remove underbody protection «51 47 490 REMOVING AND INSTALLING / REPLACING FRONT ASSEMBLY UNDERSIDE PROTECTION (X5)»(/bmw/x5/e70-2006-2010/remont/door-locks-anti-theft-systems/#body-equipment-repair__51-47-490-removing-and-installing) or «51 47 490 REMOVING AND INSTALLING / REPLACING FRONT UNDERBODY PROTECTION (X3)»(ref-264509-S34727723992007091500000) .
2. Remove alternator drive belt.

Release screws (1).

Tightening torque, see 23 VIBRATION DAMPER .

Remove vibration damper (2).

Scheme 252

Assemble engine.

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

Special tools required

1. «00 2 590 PLASTIGAGE (5)»(ref-202720-S20823764342005102800000)
2. «00 9 120 TORQUE ANGLE MEASURING DIAL»(ref-202720-S42716638972005102800000)

Necessary preliminary tasks

1. Remove oil sump

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).

Example

Possible classification: rbbrrb

Scheme 253

Cylinder Classification Red / Red

1. Cylinder Classification Blue / Blue
2. Cylinder Classification Blue / Blue
3. Cylinder Classification Red / Red
4. Cylinder Classification Red / Red
5. Cylinder Classification Blue / Blue

Release conrod bolts (1).

Remove connecting rod bearing cap (2).

Scheme 254

Gently release connecting rod from crankshaft.

Remove connecting rod bearing shells (1 and 2).

Install new conrod bearing shells.

Installation

Pay attention to guide lugs during installation.

Scheme 255

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

Check conrod 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 the oil-free crankshaft.

Fit conrod bearing cap so that pairing letters match up.

Scheme 256

Use the old conrod bolts to check conrod clearance.

Tighten down conrod bolts with special tool 00 9 120 .

Tightening torque: 11 24 1AZ, see 11 24 CONNECTING RODS AND BEARINGS .

Scheme 257

Unscrew conrod bearing cover. Read off conrod bearing play at width of flattened plastic thread on measurement scale.

Conrod bearing clearance, see 11 24 CONNECTING RODS AND BEARINGS N52K B25 .

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

Tightening torque: 11 24 1AZ, see 11 24 CONNECTING RODS AND BEARINGS .

Scheme 258

Assemble engine.

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

Special tools required

1. «00 9 120 TORQUE ANGLE MEASURING DIAL»(ref-202720-S42716638972005102800000)
2. 11 4 491
3. 11 4 492
4. 11 4 493
5. 11 4 494
6. 11 6 241
7. 11 6 261
8. 11 8 330

Carry out work on piston pin circlip wearing protective goggles only.

Danger of engine damage!

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

Necessary preliminary tasks

1. Remove engine
2. Mount engine on assembly stand, see «Mounting engine on assembly stand (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__mounting-engine-on-assembly-stand-n52k) .
3. Remove intake air manifold
4. Remove cylinder head, see «11 12 100 Removing and installing cylinder head (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-12-100-removing-and-installing) .
5. Remove oil sump
6. Remove oil pump, see «11 41 000 Removing and installing/replacing oil pump (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-41-000-removing-and-installingreplacing)

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

Scheme 259

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

If necessary, readjust oil spray nozzle (2), see 11 21 531 Replacing all main crankshaft bearing shells (N52K) .

Scheme 260

Release conrod bolts (1).

Tightening torque: 11 24 1AZ, see 11 24 CONNECTING RODS AND BEARINGS .

Installation

Replace screws.

Remove conrod bearing cap (2) in direction of arrow.

Danger of engine damage!

Scheme 261

Attach special tool 11 8 330 to connecting rod.

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

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

Scheme 262

Preliminary work

Clamp special tool 11 4 491 in vice.

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

Scheme 263

Carry out work on piston pin circlip wearing protective goggles only.

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

Scheme 264

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.

Scheme 265

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", see 11 25 PISTONS WITH RINGS AND PINS N52K B25 .

Scheme 266

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 11 25 PISTONS WITH RINGS AND PINS N52K B25

If necessary, replace piston.

Scheme 267

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

Move piston pin circlip (2) into installation position.

Scheme 268

Guide lug and cutout 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 piston pin circlip must be driven in with a plastic hammer in the direction of the arrow.

Scheme 269

Note. For vehicles with B30 engines.

Install all piston rings, see 11 25 671 Replacing piston rings on all pistons (N52K) .

Install all connecting rod bearing shells, see 11 24 571 Replacing all connecting rod bearing shells (N52K) .

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

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

Scheme 270

Note. For vehicles with B25 engines.

Install all piston rings, see 11 25 671 Replacing piston rings on all pistons (N52K) .

Install all connecting rod bearing shells, see 11 24 571 Replacing all connecting rod bearing shells (N52K) .

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 11 8 330 for correct position and damage.

Scheme 271

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.

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

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

Scheme 272

Scheme 273

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

Installation

Replace screws.

Install new conrod bolts (1).

Tightening torque: 11 24 1AZ, see 11 24 CONNECTING RODS AND BEARINGS .

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

Tightening torque: 11 24 1AZ, see 11 24 CONNECTING RODS AND BEARINGS .

Assemble engine.

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

Necessary preliminary tasks

1. Removing all pistons, see «11 25 530 Removing and installing/replacing all pistons (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-25-530-removing-and-installingreplacing)

Measuring axial clearance of piston rings in piston ring groove.

Technical Data.

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

Scheme 274

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 275

Determine end clearance with a feeler gauge, see 11 25 PISTONS WITH RINGS AND PINS N52K B25 .

Scheme 276

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 277

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 278

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 279

Assemble engine.

11 28 010 Replacing alternator drive belt (N51)

Special tools required

1. 11 3 340

Necessary preliminary tasks

1. Remove Fan Cowl with electric fan.

Note. Mark the direction of rotation of the drive belt if it is to be reused.

Layout of drive belt.

Scheme 280

Turn belt tensioner (4) in direction of arrow until bore (2) is flush on housing.

Hold belt tensioner (4) under tension.

Scheme 281

Secure belt tensioner with special tool 11 3 340.

Note. Illustration N42.

Scheme 282

Remove drive belt (1) towards top.

Assemble engine.

Installation

Check that drive belt for is in correct installation position - risk of damage.

11 28 010 Replacing alternator drive belt (N52K)

Special tools required

1. 11 3 340

Necessary preliminary tasks

1. Remove Fan Cowl with electric fan

Note. Mark the direction of rotation of the drive belt if it is to be reused.

Course of E9x drive belt

Turn belt tensioner (4) in direction of arrow until bore (2) is flush on housing.

Hold belt tensioner (4) under tension.

Load is removed from tensioning pulley.

Course of E85 drive belt

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

Hold belt tensioner (1) under tension.

Load is removed from tensioning pulley (2).

Scheme 283

All

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

Remove drive belt upwards.

Assemble engine.

Installation

Check that drive belt for is in correct installation position - risk of damage.

11 28 020 Replacing tensioning device for alternator drive belt (N51)

Special tools required

1. 11 3 340

Necessary preliminary tasks

1. Remove Drive Belt.

Remove special tool 11 3 340.

Release screw (3).

For tightening torque refer to 11 28 1AZ in 28 V-RIBBED BELT WITH TENSIONER .

Installation

Replace aluminum screws.

Assemble engine.

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

Special tools required

1. 11 3 340

Necessary preliminary tasks

1. Remove Drive Belt

E9x only

Remove special tool 11 3 340.

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

For tightening torque refer to 11 28 1AZ in 28 V-RIBBED BELT WITH TENSIONER .

Installation

Replace aluminum screws.

Remove belt tensioner (4).

E85 only

Remove special tool 11 3 340.

Release screw on belt tensioner (1).

For tightening torque refer to 11 28 1AZ in 28 V-RIBBED BELT WITH TENSIONER .

Installation

Replace aluminum screws.

Remove belt tensioner (1).

Assemble engine.

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

Special tools required

1. 11 0 300
2. 11 4 281
3. 11 4 282
4. 11 4 283

Necessary preliminary tasks

1. Remove «cylinder head cover»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-12-000-removing-and-installingsealing)
2. Remove underbody protection. See «51 47 490 REMOVING AND INSTALLING / REPLACING FRONT ASSEMBLY UNDERSIDE PROTECTION (X5)»(/bmw/x5/e70-2006-2010/remont/door-locks-anti-theft-systems/#body-equipment-repair__51-47-490-removing-and-installing) or «51 47 490 REMOVING AND INSTALLING / REPLACING FRONT UNDERBODY PROTECTION (X3)»(ref-264509-S34727723992007091500000)

Remove fastener (1) in direction of arrow.

Installation

Install fastener (1) with bore facing outwards.

Scheme 284

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 285

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

Scheme 286

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 287

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 288

If necessary, adjust valve timing, see 11 31 505 Adjusting timing of camshaft(s) (N52K) .

Assemble engine.

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

Special tools required

1. 11 4 281
2. 11 4 481

Necessary preliminary tasks

1. Remove «cylinder head cover»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-12-000-removing-and-installingsealing)
2. Remove inlet adjustment unit
3. Remove intermediate lever, see «11 37 010 Removing and installing/replacing intermediate levers (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-37-010-removing-and-installingreplacing) .
4. Adjust valve timing, see «11 31 505 Adjusting timing of camshaft(s) (N52K)»(/bmw/x5/e70-2006-2010/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, see 11 31 CAMSHAFT .

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

Scheme 289

Remove inlet camshaft (2) towards top.

Installation

Clean all bearing points and lubricate with oil.

Check plain compression rings (1) for damage and replace if necessary.

Scheme 290

Plain compression rings (1) are engaged at joint.

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

Scheme 291

Scheme 292

Insert inlet camshaft (1) so that part number on twin surface points upwards.

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

Attach special tool 11 4 281 to twin surface.

Assemble engine.

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

Special tools required

1. 00 9 120
2. 11 4 350
3. 11 4 461
4. 11 4 462
5. 11 4 463
6. 11 9 000

Necessary preliminary tasks

1. Remove «cylinder head cover»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-12-000-removing-and-installingsealing)
2. Remove exhaust adjustment unit
3. Adjust valve timing

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

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

Remove upper bearing bank (1).

Remove exhaust camshaft from lower bearing bank.

Scheme 293

Mixing up the inlet and exhaust camshaft will result in engine damage .

Scheme 294

Check plain compression rings (1) for damage and replace if necessary.

Plain compression rings (1) are engaged at joint.

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

Mounting bearing bank

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 cam followers (3) on cylinder no. 2 with spindle nut (2) of special tool 11 4 462.

Scheme 295

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 296

Position lower bearing bank (1) with exhaust camshaft (2) cam followers.

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 twin surface of exhaust camshaft (2) points upwards.

Scheme 297

Fit upper bearing bank (1).

Insert bolts dry.

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

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

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

Installation

Upper and lower bearing banks 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 298

Note. Schematic depiction of special tool 11 4 461 at upper bearing bank (1) and lower bearing bank (2).

Pretension all special tools 11 4 461 with special tool 11 4 350 only.

Scheme 299

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

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

Scheme 300

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

Scheme 301

Scheme 302

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 bank are easily accessible.

Scheme 303

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

Tightening torque: 11 31 1AZ, see 11 31 CAMSHAFT .

Scheme 304

Assemble engine.

11 31 051 Replacing timing chain (N52K)

Special tools required

1. 00 9 140
2. 11 0 300
3. 11 4 280
4. 11 4 281
5. 11 4 282
6. 11 4 283
7. 11 4 360
8. 11 4 362
9. 11 5 200
10. 11 9 280

Necessary preliminary tasks

1. Remove «cylinder head cover»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-12-000-removing-and-installingsealing)
2. Remove all spark plugs
3. Remove chain tensioner, see «11 31 090 Installing and removing/replacing chain tensioner piston (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-31-090-installing-and-removingreplacing)
4. Remove crankshaft radial seal at front, see «11 14 005 Replacing front crankshaft radial seal (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-14-005-replacing-front-crankshaft)
5. Remove drive belt tensioner
6. Remove «VIBRATION DAMPER»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52)

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, see 11 21 CRANKSHAFT AND BEARINGS .

Remove hub towards front.

Scheme 305

Open plug (1).

Tightening torque: 11 31 7AZ, see 11 31 CAMSHAFT .

Scheme 306

Open plug (1).

Tightening torque: 11 11 7AZ, see 11 11 CRANKCASE .

Installation

Replace aluminum screws.

Scheme 307

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

Tightening torque: 11 31 5AZ, see 11 31 CAMSHAFT .

Scheme 308

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

Tightening torque: 11 31 4AZ, see 11 31 CAMSHAFT .

Scheme 309

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, see 11 31 CAMSHAFT .

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

Scheme 310

Scheme 311

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 312

Install hub with central bolt.

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

Scheme 313

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, see 11 21 CRANKSHAFT AND BEARINGS .

Mark central bolt and hub with paint.

Scheme 314

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, see 11 21 CRANKSHAFT AND BEARINGS .

Scheme 315

Tighten central bolt with a second person helping.

Tightening torque: 11 21 1AZ, see 11 21 CRANKSHAFT AND BEARINGS .

Install inlet and exhaust adjustment units.

Install chain tensioner, see 11 31 090 Installing and removing/replacing chain tensioner piston (N52K) .

Crank engine twice.

Check timing, see 11 31 005 Checking timing of camshaft(s) (N52K) .

If necessary, adjust valve timing, see 11 31 505 Adjusting timing of camshaft(s) (N52K) .

Assemble engine.

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

Release chain tensioner (1).

Tightening torque: 11 31 6AZ, see 11 31 CAMSHAFT .

Installation

No sealing ring is fitted during series-production assembly.

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

Scheme 316

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 317

Assemble engine.

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

Special tools required

1. «00 9 120 TORQUE ANGLE MEASURING DIAL»(ref-202720-S42716638972005102800000)
2. «00 9 250 TORSION ANGLE WRENCH WITH FLEXIBLE EXTENSION»(ref-202720-S36101793762005102800000)
3. 11 0 300
4. 11 4 280
5. 11 4 281
6. 11 4 282
7. 11 4 283
8. 11 4 290
9. 11 9 340

Necessary preliminary tasks

1. Remove «cylinder head cover»(/bmw/x5/e70-2006-2010/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.

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.

Part numbers (2) on 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 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.

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 318

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 319

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, see 11 36 VARIABLE CAMSHAFT CONTROL VANOS .

Scheme 320

Assemble engine.

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

Special tools required

1. 11 4 480

Necessary preliminary tasks

1. Remove «cylinder head cover»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-12-000-removing-and-installingsealing)
2. Remove intermediate lever, see «11 37 010 Removing and installing/replacing intermediate levers (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-37-010-removing-and-installingreplacing) .
3. Remove exhaust camshaft, see «11 31 028 Removing and installing/replacing exhaust camshaft (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-31-028-removing-and-installingreplacing) .

Detach cam followers (1) from HVCA element and remove.

Set down all cam followers (1) in neat order in special tool 11 4 480 .

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 321

Assemble engine.

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

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

Special tools required

1. 11 4 480

Necessary preliminary tasks

1. Remove cylinder head, see «11 12 100 Removing and installing cylinder head (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-12-100-removing-and-installing) .
2. Remove intermediate lever, see «11 37 010 Removing and installing/replacing intermediate levers (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-37-010-removing-and-installingreplacing) .
3. Remove eccentric shaft, see «11 37 005 Removing and installing/replacing eccentric shaft (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-37-005-removing-and-installingreplacing)
4. Remove inlet camshaft, see «11 31 025 Removing and installing/replacing inlet camshaft (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-31-025-removing-and-installingreplacing)
5. Remove exhaust camshaft, see «11 31 028 Removing and installing/replacing exhaust camshaft (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-31-028-removing-and-installingreplacing)
6. Remove cam followers, see «11 33 050 Removing and installing/replacing all cam followers (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-33-050-removing-and-installingreplacing)
7. Remove valve springs, see «11 34 715 Replacing all valve springs (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-34-715-replacing-all-valve)
8. Remove valve stem seals, see «11 34 560 Replacing all valve stem seals (N52K)»(/bmw/x5/e70-2006-2010/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 322

Assemble engine.

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

11 34 560 Replacing all valve stem seals (N52K)

Special tools required

1. 11 1 480
2. 11 6 380

Necessary preliminary tasks

1. Remove cylinder head, see «11 12 100 Removing and installing cylinder head (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-12-100-removing-and-installing) .
2. Remove intermediate lever, see «11 37 010 Removing and installing/replacing intermediate levers (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-37-010-removing-and-installingreplacing) .
3. Remove eccentric shaft, see «11 37 005 Removing and installing/replacing eccentric shaft (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-37-005-removing-and-installingreplacing)
4. Remove inlet camshaft, see «11 31 025 Removing and installing/replacing inlet camshaft (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-31-025-removing-and-installingreplacing)
5. Remove exhaust camshaft, see «11 31 028 Removing and installing/replacing exhaust camshaft (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-31-028-removing-and-installingreplacing) .
6. Remove cam followers, see «11 33 050 Removing and installing/replacing all cam followers (N52K)»(/bmw/x5/e70-2006-2010/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 323

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 324

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 325

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 326

Assemble engine.

11 34 715 Replacing all valve springs (N52K)

Special tools required

1. 11 0 346
2. 11 4 480
3. 11 9 000
4. 11 9 017

Necessary preliminary tasks

1. Remove cylinder head, see «11 12 100 Removing and installing cylinder head (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-12-100-removing-and-installing) .
2. Remove exhaust camshaft, see «11 31 028 Removing and installing/replacing exhaust camshaft (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-31-028-removing-and-installingreplacing) .
3. Remove intermediate lever, see «11 37 010 Removing and installing/replacing intermediate levers (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-37-010-removing-and-installingreplacing) .
4. Remove inlet camshaft, see «11 31 025 Removing and installing/replacing inlet camshaft (N52K)»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-31-025-removing-and-installingreplacing)
5. Remove cam followers, see «11 33 050 Removing and installing/replacing all cam followers (N52K)»(/bmw/x5/e70-2006-2010/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 327

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 328

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

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

Scheme 329

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

Special tools required

1. 11 4 481

Necessary preliminary tasks

1. Remove «cylinder head cover»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-12-000-removing-and-installingsealing)
2. Remove intermediate lever, see «11 37 010 Removing and installing/replacing intermediate levers (N52K)»(/bmw/x5/e70-2006-2010/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 tidy and orderly fashion.

Remove eccentric shaft with gentle tilting and turning movements.

Scheme 330

Release screw.

Remove magnet wheel (1).

Scheme 331

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

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

Remove all needle bearings (1) from eccentric shaft.

Scheme 332

Install bearing shells (1) as pictured.

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

Scheme 333

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 334

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, see 11 12 CYLINDER HEAD WITH CYLINDER HEAD COVER .

Assemble engine.

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

Special tools required

1. 11 4 270
2. 11 4 450
3. 11 4 481

Necessary preliminary tasks

1. Remove «cylinder head cover»(/bmw/x5/e70-2006-2010/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).

Secure special tool 11 4 270 with gripping pliers (3) to guide block (2).

Scheme 335

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

Press special tool 11 4 270 in direction of arrow as far as it will go.

Scheme 336

Release screw (2) of torsion spring.

Tightening torque: 11 37 2AZ, see 11 37 VARIABLE VALVE GEAR .

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

Scheme 337

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

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

Installation

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

Scheme 338

Press torsion spring apart at positions (1).

Remove torsion spring towards top.

Scheme 339

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

Scheme 340

1. Eccentric shaft with bearing
2. Bearing caps of eccentric shaft (set out in order)
3. Inlet camshaft
4. Bearing caps of inlet camshaft (set out in order)
5. Inlet 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, see 11 37 VARIABLE VALVE GEAR .

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 341

Installation

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

Scheme 342

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 343

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 344

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 bolt connection (1) of eccentric shaft.

Turn 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, see 11 37 VARIABLE VALVE GEAR .

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 345

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 346

Secure special tool 11 4 270 with gripping pliers (3) to guide block (2).

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

Press special tool 11 4 270 in direction of arrow as far as it will go.

Insert screw (2) of torsion spring.

Tightening torque: 11 37 2AZ, see 11 37 VARIABLE VALVE GEAR .

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

Remove special tool 11 4 270 .

Scheme 347

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, see 11 37 VARIABLE VALVE GEAR .

Scheme 348

Assemble engine.

11 40 000 Checking engine oil pressure (N52, N52K)

Necessary preliminary tasks

1. Remove engine cover.
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 349

Screw in special tool 11 4 050 with sealing ring. (Scheme 350)

Scheme 350

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.

See 41 OIL PUMP WITH FILTER AND DRIVE .

Scheme 351

Assemble engine.

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

Necessary preliminary tasks

1. Remove oil sump

Release screws (1).

Tightening torque, see 11 41 1AZ in 11 41 OIL PUMP WITH STRAINER AND DRIVE .

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, see 11 41 OIL PUMP WITH STRAINER AND DRIVE .

Release screws (2).

Tightening torque: 11 41 5AZ, see 11 41 OIL PUMP WITH STRAINER AND DRIVE .

Installation

Replace aluminum screws.

Release screws (1).

Tightening torque: 11 41 2AZ, see 11 41 OIL PUMP WITH STRAINER AND DRIVE .

Tightening torque: 11 41 3AZ, see 11 41 OIL PUMP WITH STRAINER AND DRIVE .

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

Special tools required

1. 00 9 140
2. 11 0 290
3. 11 0 300
4. 11 4 120
5. 11 4 280
6. 11 4 360
7. 11 4 362
8. 11 4 440
9. 11 5 200
10. 11 9 280

Necessary preliminary tasks

1. Remove «cylinder head cover»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-12-000-removing-and-installingsealing)
2. Remove «oil sump»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-13-000-removing-and-installing)
3. Remove drive belt
4. Remove drive belt tensioner
5. Remove «VIBRATION DAMPER»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52)
6. Remove sealing cover for vacuum pump

Procedure on installed engine

Turn sprocket wheel (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 wheel (3) and special tool 11 4 362 .

Release screw (2) for sprocket wheel (3).

Tightening torque: 11 66 2AZ, see 11 66 VACUUM PUMP .

Scheme 352

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

Disconnect timing chain with special tool 11 4 120 .

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

Installation

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

Scheme 353

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

Release screw (1) for sprocket wheel.

Tightening torque: 11 41 6AZ, see 11 41 OIL PUMP WITH STRAINER AND DRIVE .

Release screws (2) for chain module.

Tightening torque: 11 41 5AZ, see 11 41 OIL PUMP WITH STRAINER AND DRIVE .

Installation

Replace aluminum screws.

Secure crankshaft and camshaft with special tools 11 0 300 and 11 4 280

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

Release central bolt (1).

Tightening torque: 11 21 1AZ, see 11 21 CRANKSHAFT AND BEARINGS .

Installation

Replace central bolt (1).

Remove hub (2) towards front.

Installation

Replace crankshaft radial seal at front, see 11 14 005 Replacing front crankshaft radial seal (N52K) .

Scheme 354

Open screw plug on bedplate.

Tightening torque: 11 11 8AZ, see 11 11 CRANKCASE .

Installation

Replace aluminum screws.

Release screw for chain module (1).

Tightening torque: 11 41 4AZ, see 11 41 OIL PUMP WITH STRAINER AND DRIVE .

Installation

Replace aluminum screws.

Remove chain module (1) in direction of arrow.

Scheme 355

Procedure on removed engine

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

Release screw (1) for sprocket wheel.

Tightening torque: 11 66 2AZ, see 11 66 VACUUM PUMP .

Release screw (2) for sprocket wheel.

Tightening torque: 11 41 6AZ, see 11 41 OIL PUMP WITH STRAINER AND DRIVE .

Release central bolt (3).

Tightening torque: 11 21 1AZ, see 11 21 CRANKSHAFT AND BEARINGS .

Scheme 356

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 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, see 11 21 CRANKSHAFT AND BEARINGS .

Mark central bolt and hub with paint.

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, see 11 21 CRANKSHAFT AND BEARINGS .

Installation

Replace crankshaft radial seal at front, see 11 14 005 Replacing front crankshaft radial seal (N52K) .

Assemble engine.

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

No steel screws/bolts may be used due to the threat of electrochemical corrosion.

A magnesium crankcase requires aluminum screws/bolts exclusively.

Aluminum screws/bolts must be replaced each time they are released.

Aluminum screws/bolts are permitted with and without

color coding (blue).

For reliable identification

Aluminum screws/bolts are not magnetic.

Jointing torque and angle of rotation must be observed without fail (risk of damage).

Necessary preliminary tasks

1. Remove front underbody protection. See «51 47 490 REMOVING AND INSTALLING / REPLACING FRONT ASSEMBLY UNDERSIDE PROTECTION (X5)»(/bmw/x5/e70-2006-2010/remont/door-locks-anti-theft-systems/#body-equipment-repair__51-47-490-removing-and-installing) or «51 47 490 REMOVING AND INSTALLING / REPLACING FRONT UNDERBODY PROTECTION (X3)»(ref-264509-S34727723992007091500000)
2. Have a cleaning cloth ready to catch escaping oil

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

Scheme 357

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

Tightening torque

Scheme 358

Replace O-ring (1).

Scheme 359

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. See «17 00 005 DRAINING AND ADDING COOLANT (N52K) (X3)»(ref-264493-S06094612532007091500000) or «17 00 005 DRAINING AND ADDING COOLANT IN RADIATOR (N52K) (X5)»(/bmw/x5/e70-2006-2010/remont/cooling-system-mechanical/#cooling-system-repair-n52-n62__17-00-005-draining-and-adding) .
2. Remove intake air «MANIFOLD»(/bmw/x5/e70-2006-2010/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, see 11 42 2AZ in 11 42 OIL FILTER ELEMENT WITH CONNECTIONS

Scheme 360

Unfasten screws (2).

Note. Have cleaning cloth ready to catch residual oil.

Tightening torque: see 11 42 2AZ in 11 42 OIL FILTER ELEMENT WITH CONNECTIONS

Installation

Replace all seals.

If necessary, replace filter element.

Assemble engine.

Note. Protect drive belt against dirt.

Installation

For VENTING INSTRUCTIONS see 17 00 039 VENTING COOLING SYSTEM AND CHECKING FOR LEAKS (X3) or 17 00 039 VENTING COOLING SYSTEM AND CHECKING FOR WATER LEAKS (N52K) (X5) .

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.

Necessary preliminary tasks

1. Remove coolant thermostat

Unfasten hose clip (1).

For tightening torque refer to 11 53 5AZ in 11 53 COOLANT THERMOSTAT WITH CONNECTIONS .

Remove coolant hose.

Unfasten hose clip (2).

For tightening torque refer to 11 53 3AZ in 11 53 COOLANT THERMOSTAT WITH CONNECTIONS .

Remove coolant hose.

Disconnect plug connection (3).

Release screws (4).

For tightening torque refer to 11 51 1AZ in 11 51 ELECTRIC WATER PUMP WITH DRIVE .

Scheme 361

Installation

Replace aluminum screws.

Remove electric water pump (x) via x.

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. . See 17 00 005 DRAINING AND ADDING COOLANT (N52K) .

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

Recycling

Catch and dispose of drained coolant in a suitable container.

Observe country-specific waste-disposal regulations.

Necessary preliminary tasks

1. Drain Coolant

Note. For purposes of clarity, the picture and text refer to the component when removed.

Unfasten hose clip (1).

For tightening torque refer to 11 53 5AZ in 11 53 COOLANT THERMOSTAT WITH CONNECTIONS .

Remove coolant hose.

Unfasten hose clip (2).

For tightening torque refer to 11 53 6AZ in 11 53 COOLANT THERMOSTAT WITH CONNECTIONS .

Remove coolant hose.

Unlock and detach coolant hose (3).

Unlock and detach coolant hose (4).

Disconnect plug connection (5).

Release screws (6).

For tightening torque refer to 11 53 1AZ in 11 53 COOLANT THERMOSTAT WITH CONNECTIONS .

Remove coolant thermostat (7).

Assemble engine.

Scheme 362

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

Necessary preliminary tasks

1. Remove Tension Strut
2. Remove Intake Filter Housing
3. Remove Ignition Coil Cover

Open holder (2).

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

Release both crankcase breathers (3).

Scheme 363

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 364

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

Scheme 365

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

Note. Do not detach fuel line.

Release screws (1).

For tightening torque refer to 11 61 1AZ in 11 61 AIR INTAKE MANIFOLD .

Unscrew nuts (3).

For tightening torque refer to 11 61 2AZ in 11 61 AIR INTAKE MANIFOLD .

Scheme 366

Raise air intake manifold approx. 10 cm.

Disconnect plug connections (1) at bottom.

Release tank vent line behind throttle valve assembly.

Scheme 367

Installation

Replace all seals.

Assemble engine.

18 40 050 Removing and installing/replacing front exhaust manifold (N52/ N52K/ N51)

Necessary preliminary tasks

1. Remove rear exhaust manifold

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.

Tightening torque: 11 78 1AZ, see 11 78 EXHAUST GAS CONTROL, LAMBDA CONTROL SENSOR / LAMBDA MONITOR SENSOR .

Unscrew nuts.

Remove exhaust manifold (1).

Installation

Clean sealing faces and replace seals.

Replace nuts.

Scheme 368

11 66 000 Removing and installing or replacing vacuum/oil pump (N47 D20 O1)

Necessary preliminary work

1. Removing «oil sump»(/bmw/x5/e70-2006-2010/remont/mechanical/#engine-repair-n52__11-13-000-removing-and-installing) .

Release screws (1).

Remove intake snorkel in direction of arrow.

Scheme 369

Release screw (1).

Scheme 370

Release screws (1).

Installation note

Clean and blow out thread

Scheme 371

Release screws (1).

When installed, the oil pump chain must be fed out from the sprocket wheel of the oil pump drive gear; the sprocket wheel cannot be removed.

Note. Illustration shows gear case cover removed.

Scheme 372

Oil vacuum pump must be fed out at chain drive (1).

Scheme 373

Feed out oil vacuum pump (1) in direction of arrow and remove.

Installation in reverse sequence.

Installation note

Clean all sealing surfaces.

Scheme 374

Install all screws (1) and tighten down.

Tightening torque, see 11 41 1AZ in 11 41 OIL PUMP WITH STRAINER AND DRIVE

Install and tighten down screws (1).

Installation note

Clean and blow out thread

Insert and secure screw (1).

Secure screw (1) with special tool 00 9 120 .

Tightening torque, see 11 41 2AZ in 11 41 OIL PUMP WITH STRAINER AND DRIVE

Assemble engine.

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

Work should only be carried out on an exhaust system that has cooled down.

Installation note

The threads of new oxygen control sensors are already coated with Never Seez Compound.

If a oxygen 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. The exhaust system does not have to be removed.

Lambda control sensor, cylinder nos. 1 to 3

Necessary preliminary tasks

1. Remove complete exhaust system «EXHAUST SYSTEM (X3)»(ref-202780-S28948719632005102900000) or «EXHAUST SYSTEM (X5)»(/bmw/x5/e70-2006-2010/remont/exhaust/#exhaust-repair-n52) .

Disconnect plug connection on oxygen control sensor (1).

Release lambda control sensor (1) on exhaust manifold of cylinder nos. 4 to 6 with special tool 11 4 260.

Scheme 375

All

Installation note

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, see 11 78 1AZ in 78 EMISSION CONTROL, OXYGEN SENSOR .

Assemble engine.

Check function of DME.

11 78 545 Replacing both lambda oxygen monitoring sensors (N52K)

Work should only be carried out on an exhaust system that has cooled down.

Necessary preliminary tasks

1. Remove underbody protection. See «51 47 490 REMOVING AND INSTALLING / REPLACING FRONT ASSEMBLY UNDERSIDE PROTECTION (X5)»(/bmw/x5/e70-2006-2010/remont/door-locks-anti-theft-systems/#body-equipment-repair__51-47-490-removing-and-installing) or «51 47 490 REMOVING AND INSTALLING / REPLACING FRONT UNDERBODY PROTECTION (X3)»(ref-264509-S34727723992007091500000) .

Installation note

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 on lambda monitoring sensor (1).

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

Tightening torque, see 11 78 1AZ in 78 EMISSION CONTROL, OXYGEN SENSOR .

Installation note

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

Scheme 376

Disconnect plug connection on lambda monitoring sensor (1).

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

Tightening torque, see 11 78 1AZ in 78 EMISSION CONTROL, OXYGEN SENSOR .

Installation note

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

Scheme 377

Assemble engine.

Check function of DME.

See also:
• 11 42 OIL FILTER ELEMENT WITH CONNECTIONS
• 11 13 OIL PAN
• 11 12 CYLINDER HEAD WITH CYLINDER HEAD COVER
• 51 00 ... SERVICE POSITION OF ENGINE HOOD/BONNET 9X5)
• 51 13 116 REMOVING AND INSTALLING/REPLACING COWL PANEL COVER (X5)
• 51 71 372 REMOVING AND INSTALLING/REPLACING BOTH TENSION STRUTS ON SPRING STRUT DOMES (X5)
• 13 71 000 REMOVING AND INSTALLING/REPLACING INTAKE FILTER HOUSING (N52K) (X5)
• 12 13 511 REPLACING IGNITION COIL (N52, N52K, N51)
• 12 51 100 REPLACING WIRING HARNESS SECTION FOR IGNITION COIL (N52K)
• 37 VARIABLE VALVE GEAR
• 17 00 005 DRAINING AND ADDING COOLANT IN RADIATOR (N52K) (X5)
• 11 37 VARIABLE VALVE GEAR
• 31 11 506 LOWERING/RAISING FRONT AXLE CARRIER (UNIVERSAL LIFTER) (X5)
• 31 50 001 REMOVING AND INSTALLING/REPLACING FRONT DIFFERENTIAL (X5)
• 11 11 CRANKCASE
• 11 41 OIL PUMP WITH STRAINER AND DRIVE
• 11 22 FLYWHEEL
• 51 47 490 REMOVING AND INSTALLING / REPLACING FRONT ASSEMBLY UNDERSIDE PROTECTION (X5)
• 11 24 CONNECTING RODS AND BEARINGS
• 11 31 CAMSHAFT
• 11 21 CRANKSHAFT AND BEARINGS
• 11 36 VARIABLE CAMSHAFT CONTROL VANOS
• 11 66 VACUUM PUMP
• 17 00 039 VENTING COOLING SYSTEM AND CHECKING FOR WATER LEAKS (N52K) (X5)
• 11 53 COOLANT THERMOSTAT WITH CONNECTIONS
• 11 51 ELECTRIC WATER PUMP WITH DRIVE
• 11 61 AIR INTAKE MANIFOLD
• 11 78 EXHAUST GAS CONTROL, LAMBDA CONTROL SENSOR / LAMBDA MONITOR SENSOR
• EXHAUST SYSTEM (X5)
• 11 12 100 Removing and installing cylinder head (N52K)
• 11 12 719 Resurfacing cylinder head sealing face (N52K)
• 11 12 729 Checking cylinder head for water leaks (N52K)
• 11 31 028 Removing and installing/replacing exhaust camshaft (N52K)
• 11 37 010 Removing and installing/replacing intermediate levers (N52K)
• 11 34 560 Replacing all valve stem seals (N52K)
• VIBRATION DAMPER
• 11 22 500 Removing and installing/replacing flywheel (N52K)
• Mounting engine on assembly stand (N52K)
• 11 41 000 Removing and installing/replacing oil pump (N52K)
• 11 41 010 Removing and installing/replacing chain module for oil pump/vacuum pump (N52K)
• 11 31 051 Replacing timing chain (N52K)
• 11 25 530 Removing and installing/replacing all pistons (N52K)
• 11 21 531 Replacing all main crankshaft bearing shells (N52K)
• 11 14 005 Replacing front crankshaft radial seal (N52K)
• 11 14 151 Replacing crankshaft radial seal (transmission side) (N52K)
• OIL SUMP
• 11 21 500 Replacing crankshaft (N52K)
• 11 25 671 Replacing piston rings on all pistons (N52K)
• 11 24 571 Replacing all connecting rod bearing shells (N52K)
• cylinder head cover
• 11 31 505 Adjusting timing of camshaft(s) (N52K)
• REMOVING AND INSTALLING/REPLACING ALL CAM FOLLOWERS
• 11 31 090 Installing and removing/replacing chain tensioner piston (N52K)
• 11 31 005 Checking timing of camshaft(s) (N52K)
• 11 37 005 Removing and installing/replacing eccentric shaft (N52K)
• 11 31 025 Removing and installing/replacing inlet camshaft (N52K)
• 11 34 715 Replacing all valve springs (N52K)
• HYDRAULIC VALVE
• MANIFOLD