11 00 Engine in General N52K B25
| Cylinder | 6 | |
|---|---|---|
| Bore Diameter | Mm | 82 |
| Stroke | Mm | 79 |
| Effective displacement | Cm 3 | 2497 |
| Compression ratio | 1 | 11 |
| Max. permissible engine speed | RPM | 6500 ± 50 |
| Permissible constant speed | RPM | 6300 |
| Compression pressure: Minimum lift of Valvetronic. | 9...18 | |
| Compression pressure: Maximum deviation of all cylinders to each other. | Bar | 2 |
TECHNICAL DATA - ENGINE GENERAL N52K B25
11 00 Engine in General N52K B30
| Cylinder | 6 | |
|---|---|---|
| Bore Diameter | Mm | 85 |
| Stroke | Mm | 88 |
| Effective displacement | Cm 3 | 2996 |
| Compression ratio | 1 | 10.7 |
| Max. permissible engine speed | RPM | 6500 ± 50 |
| Permissible constant speed | RPM | 6300 |
| Compression pressure: Minimum lift of Valvetronic. | 9...18 | |
| Compression pressure: Maximum deviation of all cylinders to each other. | Bar | 2 |
TECHNICAL DATA - ENGINE GENERAL N52K B30
11 11 Engine Block, Cylinder Crankcase N52K B25
| Bore diameter stage 0 a) | Mm | 82.000 +0.014 |
|---|---|---|
| Bore diameter stage 00 a) | Mm | |
| Bore diameter stage 1 a) | Mm | 82.250 +0.014 |
| Permitted out-of-round of cylinder bore a) | Mm | 0.005 |
| Permitted conicity of cylinder bore a) | Mm | 0.010 |
| Permissible total wear tolerance between piston and cylinder (engine operated) | Mm | 0.150 |
| A) new status or recondition | ||
TECHNICAL DATA - ENGINE BLOCK, CYLINDER CRANKCASE N52K B25
11 11 Engine Block, Cylinder Crankcase N52K B30
| Bore diameter stage 0a) a) | Mm | 85.000 +0.014 |
|---|---|---|
| Bore diameter stage 00 a) | Mm | |
| Bore diameter stage 1 a) | Mm | 85.250 +0.014 |
| Permitted out-of-round of cylinder bore a) | Mm | 0.005 |
| Permitted conicity of cylinder bore a) | Mm | 0.010 |
| Permissible total wear tolerance between piston and cylinder (engine operated) | Mm | 0.150 |
| A) new status or recondition | ||
TECHNICAL DATA - ENGINE BLOCK, CYLINDER CRANKCASE N52K B30
11 12 Cylinder Head with Cover N52K B25
| Cylinder head height: Original dimension | Mm | 112.000 ± 0.050 |
|---|---|---|
| Machining limit | Mm | 111.700 ± 0.050 |
| Valve guides are not available as replacement parts. | ||
| Inside diameter of installed valve guide | ||
| Original inlet valve | Mm | 5.000+0.012 |
| Original exhaust valve | Mm | 6.000+0.012 |
| Tilt clearance, maximum (wear between valve and valve guide) | Mm | 0.500 |
TECHNICAL DATA - CYLINDER HEAD WITH COVER N52K B25
11 12 Cylinder Head with Cover N52K B30
| Cylinder head height: Original dimension | Mm | 112.000 ± 0.050 |
|---|---|---|
| Machining limit | Mm | 111.700 ± 0.050 |
| Valve guides are not available as replacement parts. | ||
| Inside diameter of installed valve guide | ||
| Original inlet valve | Mm | 5.000+0.012 |
| Original exhaust valve | Mm | 6.000+0.012 |
| Tilt clearance, maximum (wear between valve and valve guide) | Mm | 0.500 |
TECHNICAL DATA - CYLINDER HEAD WITH COVER N52K B30
11 12 Cylinder Head with Valve Seat Cover N52K B25
| Valve seat angle | ° | 45 |
|---|---|---|
| Correction angle: outer | ° | 15 |
| Correction angle: inner | ° | 60 |
| Valve seat width: Inlet | Mm | 1.0 +0.1 |
| Valve seat width: Exhaust | Mm | 1.2 +0.1 |
| Valve seat diameter | ||
| Valve seat surface: Outside dia. inlet | Mm | 27.7+0.1 |
| Valve seat surface: Outside dia. exhaust | Mm | 26.6+0.1 |
TECHNICAL DATA - CYLINDER HEAD WITH VALVE SEAT COVER N52K B25
11 12 Cylinder Head with Valve Seat Cover N52K B30
| Valve seat angle | ° | 45 |
|---|---|---|
| Correction angle: outer | ° | 15 |
| Correction angle: inner | ° | 60 |
| Valve seat width: Inlet | Mm | 1.0 +0.1 |
| Valve seat width: Exhaust | Mm | 1.2 +0.1 |
| Valve seat diameter | ||
| Valve seat surface: Outside dia. inlet | Mm | 27.7+0.1 |
| Valve seat surface: Outside dia. exhaust | Mm | 26.6+0.1 |
TECHNICAL DATA - CYLINDER HEAD WITH VALVE SEAT COVER N52K B30
11 21 Crankshaft and Bearings N52K B25
| Ground sizes of main bearing journals | Main bearing journal | |
|---|---|---|
| Original (designation S1) | Mm | 55.998 ... 55.993 |
| Original (designation S2) | Mm | 55.992 ... 55.987 |
| Original (designation S3) | Mm | 55.986 ... 55.981 |
| Crankshaft bearing clearance, radial | Mm | 0.020 ... 0.046 |
| Max. permitted runout at center crankshaft journal | Mm | 0.150 |
TECHNICAL DATA - CRANKSHAFT AND BEARINGS N52K B25
| Grinding stages, crankshaft guide bearing | ||
|---|---|---|
| Standard | Mm | 24.0 F8 |
| Crankshaft axial play | Mm | 0.060 ... 0.250 |
TECHNICAL DATA - CRANKSHAFT AND BEARINGS N52K B25
| Ground sizes of conrod bearing journals | ||
|---|---|---|
| Standard | Mm | 50.000 -0.007 -0.027 |
| Radial conrod bearing play | Mm | 0.025...0.070 |
TECHNICAL DATA - CRANKSHAFT AND BEARINGS N52K B25
| Ground sizes of main bearing journals | Main bearing journal | |
|---|---|---|
| Original (designation S1) | Mm | 55.998...55.993 |
| Original (designation S2) | Mm | 55.992...55.987 |
| Original (designation S3) | Mm | 55.986...55.981 |
| Grinding stage 1 (designation B1) | Mm | 55.748...55.742 |
| Grinding stage 1 (designation B2) | Mm | 55.742...55.737 |
| Grinding stage 1 (designation B3) | Mm | 55.737...55.731 |
| Grinding stage 2 (designation C1) | Mm | 55.498...55.492 |
| Grinding stage 2 (designation C2) | Mm | 55.492...55.487 |
| Grinding stage 2 (designation C3) | Mm | 55.487...55.481 |
| Crankshaft bearing clearance, radial | Mm | 0.020...0.046 |
| Maximum permitted runout on central crankshaft journal | Mm | 0.15o |
TECHNICAL DATA - CRANKSHAFT AND BEARINGS N52K B25
11 21 Crankshaft and Bearings N52K B30
| Ground sizes of main bearing journals | Guide bearing journal | |
|---|---|---|
| Original (designation S1) | Mm | 64.998 ... 64.993 |
| Original (designation S2) | Mm | 64.992 ... 64.987 |
| Original (designation S3) | Mm | 64.986 ... 64.981 |
| Crankshaft bearing clearance, radial | Mm | 0.020 ... 0.046 |
| Maximum permitted runout on central crankshaft journal | Mm | 0.150 |
TECHNICAL DATA - CRANKSHAFT AND BEARINGS N52K B30
| Ground sizes of conrod bearing journals | ||
|---|---|---|
| Identification mark (b) | Mm | 49.9820... 49.9924 |
| Identification mark (R) | Mm | 49.9925... 50.0020 |
| Radial conrod bearing play | Mm | 0.025 ... 0.061 |
TECHNICAL DATA - CRANKSHAFT AND BEARINGS N52K B30
| Grinding stages, crankshaft guide bearing | ||
|---|---|---|
| Standard | Mm | 24.0 F8 |
| Crankshaft axial play | Mm | 0.060...0.250 |
TECHNICAL DATA - CRANKSHAFT AND BEARINGS N52K B30
| Ground sizes of main bearing journals | Main bearing journal | |
|---|---|---|
| Original (designation S1) | Mm | 64.998...64.993 |
| Original (designation S2) | Mm | 64.992...64.987 |
| Original (designation S3) | Mm | 64.986...64.981 |
| Grinding stage 1 (designation B1) | Mm | 64.748...64.742 |
| Grinding stage 1 (designation B2) | Mm | 64.742...64.737 |
| Grinding stage 1 (designation B3) | Mm | 64.737...64.731 |
| Grinding stage 2 (designation C1) | Mm | 64.498...64.492 |
| Grinding stage 2 (designation C2) | Mm | 64.492...64.487 |
| Grinding stage 2 (designation C3) | Mm | 64.487...64.481 |
| Crankshaft bearing clearance, radial | Mm | 0.020...0.046 |
| Maximum permitted runout on central crankshaft journal | Mm | 0.150 |
TECHNICAL DATA - CRANKSHAFT AND BEARINGS N52K B25
11 23 Vibration Damper N52K B25
| Max. permitted radial runout | Mm | 0.100 |
|---|---|---|
| Max. permitted axial runout | Mm | 0.100 |
TECHNICAL DATA - VIBRATION DAMPER N52K B25
11 23 Vibration Damper N52K B30
| Max. permitted radial runout | Mm | 0.100 |
|---|---|---|
| Max. permitted axial runout | Mm | 0.100 |
TECHNICAL DATA - VIBRATION DAMPER N52K B30
11 24 Connecting Rods and Bearings N52K B25
| Large connecting rod eye (without bearing) diameter | Mm | 53.600 +0.016 |
|---|---|---|
| Conrod bushing: Inside diameter | Mm | 20.000 +0.013 +0.004 |
| Permissible total deviation of connecting rods in one engine (without bearing shells) | G | ± 5 |
TECHNICAL DATA - CONNECTING RODS AND BEARINGS N52K B25
11 24 Connecting Rods and Bearings N52K B30
| Large connecting rod eye (without bearing) diameter | Mm | 53.600 +0.016 |
|---|---|---|
| Conrod bushing: Inside diameter | Mm | 20.000 +0.013 +0.004 |
| Permissible total deviation of connecting rods in one engine (without bearing shells) | G | ± 5 |
TECHNICAL DATA - CONNECTING RODS AND BEARINGS N52K B30
11 25 Pistons with Rings and Pins N52K B25
| Piston and pin are paired to each other - replace together only. | ||
|---|---|---|
| Measuring point "A" (position) | Mm | 10 |
| Piston diameter at measuring point "A" | ||
| Original, stage 0 (new dimension) | Mm | 81.985 ± 0.014 |
| Repair stage (new dimension) | Mm | % |
| Oversize, stage 1 (new dimension) | Mm | 84.235 ± 0.014 |
| Piston installation clearance (piston new) | Mm | 0.000...0.043 |
| Piston installation clearance (piston worn) | Mm | 0.020...0.047 |
| Permissible total wear tolerance between piston and cylinder (engine operated) | Mm | 0.150 |
TECHNICAL DATA - PISTONS WITH RINGS AND PINS N52K B25
| 1st groove | ||
|---|---|---|
| End clearance | Mm | 0.180 ... 0.330 |
| Axial play | Mm | 0.020...0.060 |
| 2nd groove | ||
| End clearance | Mm | 0.300 ... 0.500 |
| Axial play | Mm | 0.020...0.060 |
| 3rd groove | ||
| End clearance | Mm | Cannot be measured |
| Axial play | Mm | Cannot be measured |
TECHNICAL DATA - PISTONS WITH RINGS AND PINS N52K B25
11 25 Pistons with Rings and Pins N52K B30
| Piston and pin are paired to each other - replace together only. | ||
|---|---|---|
| Measuring point "A" (position) | Mm | 14 |
| Piston diameter at measuring point "A" | ||
| Original, stage 0 (new dimension) | Mm | 84.990 ± 0.010 |
| Repair stage (new dimension) | Mm | % |
| Oversize, stage 1 (new dimension) | Mm | 85.240±0.010 |
| Piston installation clearance (piston new) | Mm | 0.000...0.034 |
| Piston installation clearance (piston worn) | Mm | 0.020...0.047 |
| Permissible total wear tolerance between piston and cylinder (engine operated) | Mm | 0.150 |
TECHNICAL DATA - PISTONS WITH RINGS AND PINS N52K B30
| 1st groove | ||
|---|---|---|
| End clearance | Mm | 0.150 ... 0.300 |
| Axial play | Mm | 0.020...0.070 |
| 2nd groove | ||
| End clearance | Mm | 0.300 ... 0.500 |
| Axial play | Mm | 0.020...0.060 |
| 3rd groove | ||
| End clearance | Mm | Cannot be measured |
| Axial play | Mm | Cannot be measured |
TECHNICAL DATA - PISTONS WITH RINGS AND PINS N52K B30
11 31 Camshaft N52K B25
| Guide bearing (width) | Mm | 20.000 +0.052 |
|---|---|---|
| Radial runout | Mm | 0.054...0.099 |
| Axial play | Mm | 0.020...0.162 |
TECHNICAL DATA - CAMSHAFT N52K B25
11 31 Camshaft N52K B30
| Guide bearing (width) | Mm | 20.000 +0.052 |
|---|---|---|
| Radial runout | Mm | 0.054...0.099 |
| Axial play | Mm | 0.020...0.162 |
TECHNICAL DATA - CAMSHAFT N52K B30
11 34 Valves with Springs N52K B25
| Plate diameter | ||
|---|---|---|
| Inlet | Mm | 32.0 ±0.05 |
| Exhaust | Mm | 27.0± 0.1 |
| Stem | ||
| Inlet | Mm | 5.0 -0.1 -0.06 |
| Exhaust | Mm | 6.0 -0.1 -0.06 |
TECHNICAL DATA - VALVES WITH SPRINGS N52K B25
11 34 Valves with Springs N52K B30
| Plate diameter. | ||
|---|---|---|
| Inlet | Mm | 35.0 |
| Exhaust | Mm | 29.0 |
| Stem | ||
| Inlet | Mm | 5.0 -0.1 -0.06 |
| Exhaust | Mm | 6.0 -0.1 -0.06 |
TECHNICAL DATA - VALVES WITH SPRINGS N52K B30
11 40 Oil Supply N52K B25
| Oil grades and consumption: refer to BMW Service Operating Fluids | ||
|---|---|---|
| Oil change volume with oil filter | Ltr. | 6.5 |
| Oil change volume with oil filter for auxiliary engine oil cooler | Ltr. | 7.0 |
TECHNICAL DATA - OIL SUPPLY N52K B25
11 40 Oil Supply N52K B30
| Oil grades and consumption: refer to BMW Service Operating Fluids | ||
|---|---|---|
| Oil change volume with oil filter | Ltr. | 6.5 |
| Oil change volume with oil filter for auxiliary engine oil cooler | Ltr. | 7.0 |
TECHNICAL DATA - OIL SUPPLY N52K B30
11 41 Oil Pump with Strainer and Drive N52K B25
| Oil pressure at idle (engine at normal operating temperature) | Min bar | 1.5 |
|---|---|---|
| Control pressure (engine at normal operating temperature) | Bar | 4.0...6.0 |
TECHNICAL DATA - OIL PUMP WITH STRAINER AND DRIVE N52K B25
11 41 Oil Pump with Strainer and Drive N52K B30
| Oil pressure at idle speed with (engine at normal operating temperature) | Min bar | 1.5 |
|---|---|---|
| Control pressure with (engine at operating temperature) | Bar | 4.0...6.0 |
TECHNICAL DATA - OIL PUMP WITH STRAINER AND DRIVE N52K B30