11 00 Engine In General N52K B25
| Cylinder | 6 | |
|---|---|---|
| Bore Ø | 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 and maximum values depending on position of Valvetronic. | 9... 18 | |
| Compression pressure: Maximum deviation of all cylinders to each other. | Bar | 2 |
ENGINE GENERAL SPECIFICATION
11 00 Engine In General N52K B30
| Cylinder | 6 | |
|---|---|---|
| Bore Ø | Mm | 85 |
| Stroke | Mm | 88 |
| Effective displacement | Cm 3 | 2996 |
| Compression ratio | 1 | 10.7 |
| Max. permissible engine speed | RPM | 6550 ± 50 |
| Permissible constant speed | RPM | 6300 |
| Compression pressure: Minimum and maximum values depending on position of Valvetronic. | 9... 18 | |
| Compression pressure: Maximum deviation of all cylinders to each other. | Bar | 2 |
ENGINE GENERAL SPECIFICATION
| Cylinder | 6 | |
|---|---|---|
| Bore Ø | Mm | 85 |
| Stroke | Mm | 88 |
| Effective displacement | Cm 3 | 2996 |
| Compression ratio | 1 | 10.7 |
| Max. permissible engine speed | RPM | 6550 ± 50 |
| Permissible constant speed | RPM | 6300 |
| Compression pressure: Minimum and maximum values depending on position of Valvetronic. | 9...18 | |
| Compression pressure: Maximum deviation of all cylinders to each other. | Bar | 2 |
ENGINE GENERAL SPECIFICATION
11 11 Engine Block, Cylinder Crankcase N52K B25
| Bore Ø stage 0 a) | Mm | 82.000 +0.014 |
|---|---|---|
| Bore Ø stage 00 a) | Mm | |
| Bore Ø 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 |
ENGINE BLOCK AND CYLINDER CRANKCASE SPECIFICATION
a) new status or recondition
11 11 Engine Block, Cylinder Crankcase N52K B30
| Bore Ø stage 0 a) | Mm | 85.000 +0.014 |
|---|---|---|
| Bore Ø stage 00 a) | Mm | |
| Bore Ø 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 |
ENGINE BLOCK AND CYLINDER CRANKCASE SPECIFICATION
a) new status or recondition
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 |
CYLINDER HEAD AND COVER SPECIFICATION
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 |
CYLINDER HEAD AND COVER SPECIFICATION
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 |
| Ø Valve seat | ||
| Valve seat surface: Outside dia. inlet | Mm | 27.7 +0.1 |
| Valve seat surface: Outside dia. exhaust | Mm | 26.6 +0.1 |
CYLINDER HEAD AND VALVE SEAT COVER SPECIFICATION
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 |
| Ø Valve seat | ||
| Valve seat surface: Outside dia. inlet | Mm | 27.7 +0.1 |
| Valve seat surface: Outside dia. exhaust | Mm | 26.6 +0.1 |
CYLINDER HEAD AND VALVE SEAT COVER SPECIFICATION
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 |
CRANKSHAFT AND BEARINGS SPECIFICATION
| Grinding stages, crankshaft guide bearing | ||
|---|---|---|
| Standard | Mm | 24.0 F8 |
| Crankshaft axial play | Mm | 0.060... 0.250 |
CRANKSHAFT AND BEARINGS SPECIFICATION
| Ground sizes of conrod bearing journals | ||
|---|---|---|
| Standard | Mm | 50.000 -0.007 -0.027 |
| Radial conrod bearing play | Mm | 0.025... 0.070 |
CRANKSHAFT AND BEARINGS SPECIFICATION
| 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 |
| Max. permitted runout at center crankshaft journal | Mm | 0.150 |
CRANKSHAFT AND BEARINGS SPECIFICATION
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 |
| Max. permitted runout at center crankshaft journal | Mm | 0.150 |
CRANKSHAFT AND BEARINGS SPECIFICATION
| Grinding stages, crankshaft guide bearing | ||
|---|---|---|
| Standard | Mm | 24.0 F8 |
| Crankshaft axial play | Mm | 0.060... 0.250 |
CRANKSHAFT AND BEARINGS SPECIFICATION
| Ground sizes of conrod bearing journals | ||
|---|---|---|
| Standard | Mm | 50.000 -0.007 -0.027 |
| Radial conrod bearing play | Mm | 0.025... 0.070 |
CRANKSHAFT AND BEARINGS SPECIFICATION
| 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 |
| 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 |
| Max. permitted runout at center crankshaft journal | Mm | 0.150 |
CRANKSHAFT AND BEARINGS SPECIFICATION
11 24 Connecting Rods And Bearings N52K B25
| Ø Large connecting rod eye (without bearing) | 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 |
CONNECTING RODS AND BEARINGS SPECIFICATION
11 24 Connecting Rods And Bearings N52K B30
| Ø Large connecting rod eye (without bearing) | 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 |
CONNECTING RODS AND BEARINGS SPECIFICATION
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 (new dimension) | Mm | 81.985 ± 0.014 |
| Repair stage (new dimension) | Mm | % |
| Oversize (new dimension) | Mm | 82.235 ± 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 |
PISTONS WITH RINGS AND PINS SPECIFICATION
| 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 |
PISTONS WITH RINGS AND PINS SPECIFICATION
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 (new dimension) | Mm | 84.990 ± 0.010 |
| Repair stage (new dimension) | Mm | % |
| Oversize (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 |
PISTONS WITH RINGS AND PINS SPECIFICATION
| 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 |
PISTONS WITH RINGS AND PINS SPECIFICATION
11 31 Camshaft N52K B25
| Guide bearing (width) | Mm | 20.000 +0.052 |
|---|---|---|
| Radial play | Mm | 0.054...0.099 |
| Axial play | Mm | 0.020...0.162 |
CAMSHAFT SPECIFICATION
11 31 Camshaft N52K B30
| Guide bearing (width) | Mm | 20.000 +0.052 |
|---|---|---|
| Radial play | Mm | 0.054...0.099 |
| Axial play | Mm | 0.020...0.162 |
CAMSHAFT SPECIFICATION
11 34 Valves With Springs N52K B25
| Plate dia. | ||
|---|---|---|
| Inlet | Mm | 32.2 ± 0.05 |
| Exhaust | Mm | 27.0 ± 0.1 |
| Stem Ø | ||
| Inlet | Mm | 5.0 -0.1 -0.06 |
| Exhaust | Mm | 6.0 -0.1 -0.06 |
VALVES AND SPRINGS SPECIFICATION
11 34 Valves With Springs N52K B30
| Plate dia. | ||
|---|---|---|
| Inlet | Mm | 34.2 ± 0.05 |
| Exhaust | Mm | 29.0 ± 0.1 |
| Stem Ø | ||
| Inlet | Mm | 5.0 -0.1 -0.06 |
| Exhaust | Mm | 6.0 -0.1 -0.06 |
VALVES AND SPRINGS SPECIFICATION
11 40 Oil Supply N52K B25 B30
| Oil grades and consumption: See owner's manual for recommended engine oils for BMW Group engines | ||
|---|---|---|
| Filling capacity, engine oil change with oil filter element | Liters | 6.50 |
| Filling capacity engine oil change with oil filter element for auxiliary engine oil cooler | Liters | 7.00 |
OIL SUPPLY REFERENCE
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 |
OIL PUMP AND STRAINER SPECIFICATION
11 41 Oil Pump With Strainer And Drive N52K B30
| 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 |
OIL PUMP AND STRAINER SPECIFICATION
11 41 Oil Pump With Strainer And Drive N53 / N52K B25
| Regulated pressure | Bar | Observe diagnosis instruction |
OIL PUMP AND STRAINER SPECIFICATION
11 41 Oil Pump With Strainer And Drive N53 / N52K B30
| Regulated pressure | Bar | Observe diagnosis instruction |
OIL PUMP AND STRAINER SPECIFICATION