11 24 Connecting Rods and Bearings N55 B30
| Large connecting rod eye (without bearing) | Mm | 53.600... 53.616 |
|---|
| Conrod bushing: Inside diameter | Mm | 22.004... 22.013 |
| Permissible total deviation of connecting rods in one engine (without bearing shells) | G | ± 5 |
CONNECTING RODS AND BEARINGS SPECIFICATIONS
11 21 Crankshaft and Bearings N55 B30 Journal No. 7
| Ground sizes of main bearing journals | | Guide bearing journal number 7 |
|---|
| Original (identification mark S/1) | Mm | 64.999... 64.993 |
| Original (identification mark S/2) | Mm | 64.992... 64.987 |
| Original (identification mark S/3) | Mm | 64.986... 64.980 |
| Crankshaft bearing clearance, radial | Mm | 0.020... 0.046 |
| Max. permitted runout at centre crankshaft journal | Mm | 0.15 |
CRANKSHAFT AND BEARINGS SPECIFICATIONS
11 21 Crankshaft and Bearings N55 B30 Journal No. 1
| Ground sizes of main bearing journals | | Main bearing journal number 1 |
|---|
| Original (identification mark S/1) | Mm | 55.989... 55.983 |
| Original (identification mark S/2) | Mm | 55.982... 55.977 |
| Original (identification mark S/3) | Mm | 55.976... 55.970 |
| Crankshaft bearing clearance, radial | Mm | 0.020... 0.046 |
| Max. permitted runout at centre crankshaft journal | Mm | 0.15 |
CRANKSHAFT AND BEARINGS SPECIFICATIONS
11 21 Crankshaft and Bearings N55 B30 Journal No. 2, 3, 4, 5, 6
| Ground sizes of main bearing journals | | Main bearing journal numbers. 2, 3, 4, 5, 6 |
|---|
| Original (identification mark S/1) | Mm | 55.999... 55.993 |
| Original (identification mark S/2) | Mm | 55.992... 55.987 |
| Original (identification mark S/3) | Mm | 55.986... 55.980 |
| Crankshaft bearing clearance, radial | Mm | 0.020... 0.046 |
| Max. permitted runout at centre crankshaft journal | Mm | 0.15 |
CRANKSHAFT AND BEARINGS SPECIFICATIONS
11 21 Crankshaft and Bearings N55 B30 (Grinding Stages, Crankshaft Guide Bearings)
| Grinding stages, crankshaft guide bearing | | |
|---|
| Original | Mm | 24.020... 24.053 |
| Stage 1 | Mm | No machining possible |
| Size 2 | Mm | No machining possible |
| Crankshaft axial play | Mm | 0.060... 0.250 |
| Friction coefficient of crankshaft | Nm | 2 to 2.5 |
CRANKSHAFT AND BEARINGS SPECIFICATIONS
11 21 Crankshaft and Bearings N55 B30 (Ground Sizes Of Conrod Bearing Journals)
| Ground sizes of conrod bearing journals | | |
|---|
| Identification mark (b) | Mm | 49.9730... 49.9834 |
| Identification mark (R) | Mm | 49.9835... 49.9930 |
| Stage 1 | Mm | No machining possible |
| Size 2 | Mm | No machining possible |
| Radial conrod bearing play | Mm | 0.025... 0.071 |
CRANKSHAFT AND BEARINGS SPECIFICATIONS
11 12 Cylinder Head with Valve Seat Cover N55 B30
| Valve seat angle | ° | 45 |
|---|
| Correction angle: outer | ° | 35 |
| Correction angle: Inner, exhaust valve | ° | 60 |
| Correction angle: Inner, inlet valve | ° | 65 |
| Valve seat width: Intake | Mm | 1, 25 +0, 2 |
| Valve seat width: Exhaust | Mm | 1, 65 +0, 2 |
| Theoretical valve seat | | |
| Valve seat surface: Outside dia. inlet | Mm | 30, 4 +0, 1 |
| Valve seat surface: Outside dia. exhaust | Mm | 26, 6 +0.1 |
CYLINDER HEAD WITH VALVE SEAT COVER SPECIFICATIONS
11 12 Cylinder head with lid N55 B30
| Cylinder head height: Original dimension | Mm | 112, 00 ± 0, 05 |
|---|
| Machining limit | Mm | 111, 70 ± 0, 05 |
| Valve guides are not available as replacement parts. | | |
| Inner diameter of installed valve guide | | |
| Original intake valve | Mm | 5, 00... 5, 02 |
| Original exhaust valve | Mm | 6, 00... 6, 02 |
| Tilt clearance, maximum (wear between valve and valve guide) | Mm | Cannot be measured |
| Bearing of camshaft | | |
| Guide bearing (width) | Mm | 22, 00... 22, 05 |
CYLINDER HEAD WITH LID SPECIFICATIONS
11 11 Engine Block, Cylinder Crankcase N55 B30
| Bore stage 0 (1) | Mm | 84, 000 +0, 02 |
|---|
| Bore stage 00 (1) | Mm | |
| Bore stage 1 (1) | Mm | 84, 250 +0, 02 |
| Permitted out-of-round of cylinder bore (1) | Mm | 0.01 |
| Permitted conicity of cylinder bore (1) | Mm | 0.01 |
| Permissible total wear tolerance between piston and cylinder (engine operated) | Mm | 0.15 |
| (1) New condition or reworking |
| (1) | New condition or reworking |
ENGINE BLOCK, CYLINDER CRANKCASE SPECIFICATIONS
11 00 Engine in general N55 B30
| Cylinder | | 6 |
|---|
| Bore | Mm | 84 |
| Stroke | Mm | 89, 6 |
| Effective displacement | Cm 3 | 2979 |
| Compression ratio | 1 | 10, 2 |
| Max. permissible engine speed | Rpm | 7000 |
| Permissible constant speed | Rpm | 6500 |
| Compression pressure: Minimum and maximum values, Valvetronic at full load. | | 10... 16 |
| Compression pressure: Maximum deviation of all cylinders to each other. | Bar | 2 |
ENGINE IN GENERAL SPECIFICATIONS
11 31 Intake camshaft N55 B30
| Guide bearing (width) | Mm | 21.890... 21.920 |
|---|
| Radial runout | Mm | 0.054... 0.099 |
| Axial play | Mm | 0.08... 0.162 |
INTAKE CAMSHAFT SPECIFICATIONS
11 41 Oil Pump with Strainer and Drive N55 B30
| Oil pressure at idle speed with engine at operating temperature | Min bar | 1.5 |
|---|
| Control pressure with engine at operating temperature | Bar | 4.0... 6.0 |
OIL PUMP WITH STRAINER AND DRIVE SPECIFICATIONS
11 40 Oil supply N55 B30
| Oil grades and consumption: see recommended engine oils for BMW Group engines. See ENGINE -- OPERATING FLUIDS . | | |
|---|
| Filling capacity, engine oil change with oil filter element | Litres | 6.50 |
OIL SUPPLY SPECIFICATIONS
11 25 Pistons with Rings and Pins N55 B30
| 1st groove | | |
|---|
| End clearance | Mm | 0.15... 0.30 |
| Axial play | Mm | 0.020... 0.060 |
| 2nd groove | | |
| End clearance | Mm | 0.30... 0.50 |
| Axial play | Mm | 0.015... 0.060 |
| 3rd groove | | |
| End clearance | Mm | 0.20... 0.90 |
| Axial play | Mm | Cannot be measured |
PISTONS WITH RINGS AND PINS SPECIFICATIONS
| Piston and pin are paired to each other - replace together only. | | |
|---|
| Measuring point "A" (position) | Mm | 12 |
| Piston diameter at measuring point "A" | | |
| Original (new dimension) | Mm | 83, 98... 84, 01 |
| Repair stage (new dimension) | Mm | 84, 06... 84, 09 |
| Oversize (new dimension) | Mm | 84, 23... 84, 26 |
| Piston installation clearance (piston new) | Mm | 0, 01...0, 03 |
| Piston installation clearance (piston worn) | Mm | 0, 02...0, 08 |
| Permissible total wear tolerance between piston and cylinder (engine operated) | Mm | 0.15 |
PISTONS WITH RINGS AND PINS SPECIFICATIONS
11 34 Valves with Springs N55 B30
| Plate dia. | | |
|---|
| Intake | Mm | 32, 0 ±0, 05 |
| Exhaust | | 28.0 ± 0.1 |
| Stem [] | | |
| Intake | Mm | 4, 968 ±0, 0075 |
| Exhaust | Mm | 5, 960 ±0, 0075 |
VALVES WITH SPRINGS SPECIFICATIONS
