11 00 Engine in general N52 B25
| Cylinder | | 6 |
|---|
| Bore | 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 - TECHNICAL DATA (11 00 ENGINE IN GENERAL N52 B25)
11 00 Engine in general N52 B30
| Cylinder | | 6 |
|---|
| Bore | Mm | 85 |
| Stroke | Mm | 88 |
| Effective displacement | Cm 3 | 2996 |
| Compression ratio | 1 | 10.70 |
| 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 - TECHNICAL DATA (11 00 ENGINE IN GENERAL N52 B30)
11 11 Engine Block, Cylinder Crankcase N52 B25
| Bore ø stage 0 (1) | Mm | 82.007 +0.007 |
|---|
| Bore ø stage 00 (1) | Mm | |
| Bore ø stage 1 (1) | Mm | 82.257 +0.007 |
| Permitted out-of-round of cylinder bore (1) | Mm | 0.005 |
| Permitted conicity of cylinder bore (1) | Mm | 0.01 |
| Permissible total wear tolerance between piston and cylinder (engine operated) | Mm | 0.15 |
| (1) new status or recondition |
| (1) | New status or recondition |
ENGINE - TECHNICAL DATA (11 11 ENGINE BLOCK, CYLINDER CRANKCASE N52 B25)
11 11 Engine Block, Cylinder Crankcase N52 B30
| Bore ø stage 0 (1) | Mm | 85.007 +0.007 |
|---|
| Bore ø stage 00 (1) | Mm | |
| Bore ø stage 1 (1) | Mm | 85.250 +0.007 |
| Permitted out-of-round of cylinder bore (1) | Mm | 0.005 |
| Permitted conicity of cylinder bore (1) | Mm | 0.01 |
| Permissible total wear tolerance between piston and cylinder (engine operated) | Mm | 0.15 |
| (1) new status or recondition |
| (1) | New status or recondition |
ENGINE - TECHNICAL DATA (11 11 ENGINE BLOCK, CYLINDER CRANKCASE N52 B30)
11 12 Cylinder Head with Cover N52 B25
| 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. | | |
| Inside diameter of installed valve guide | | |
| Standard | Mm | 5.0 +0.012 |
| Tilt clearance, maximum (wear between valve and valve guide) | Mm | 0.5 |
| Bearing of camshaft | | |
| Guide bearing (width) | Mm | 21.920 ... 21.890 |
ENGINE - TECHNICAL DATA (11 12 CYLINDER HEAD WITH COVER N52 B25)
11 12 Cylinder Head with Cover N52 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. | | |
| Inside diameter of installed valve guide | | |
| Standard | Mm | 5.0 +0.012 |
| Tilt clearance, maximum (wear between valve and valve guide) | Mm | 0.5 |
| Bearing of camshaft | | |
| Guide bearing (width) | Mm | 21.920 ... 21.890 |
ENGINE - TECHNICAL DATA (11 12 CYLINDER HEAD WITH COVER N52 B30)
11 12 Cylinder Head with Valve Seat Cover N52 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 surface: Outside dia. inlet | Mm | 32.2 +0.1 |
| Valve seat surface: Outside dia. exhaust | Mm | 27.0 +0.1 |
ENGINE - TECHNICAL DATA (11 12 CYLINDER HEAD WITH VALVE SEAT COVER N52 B25)
11 12 Cylinder Head with Valve Seat Cover N52 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 surface: Outside dia. inlet | Mm | 34.2 +0.1 |
| Valve seat surface: Outside dia. exhaust | Mm | 29.0 +0.1 |
ENGINE - TECHNICAL DATA (11 12 CYLINDER HEAD WITH VALVE SEAT COVER N52 B30)
11 21 Crankshaft and Bearings N52 B25
| Grinding stages, crankshaft guide bearing | | |
|---|
| Standard | Mm | 24.0 F8 |
| Size 1 | Mm | 24.2 F8 |
| Size 2 | Mm | 24.4 F8 |
| Crankshaft axial play | Mm | 0.060 ... 0.250 |
ENGINE - TECHNICAL DATA (11 21 CRANKSHAFT AND BEARINGS N52 B25)
| Ground sizes of conrod bearing journals | | |
|---|
| Standard | Mm | 50.00 -0.009 -0.025 |
| Radial conrod bearing play | Mm | 0.025...0.070 |
ENGINE - TECHNICAL DATA (11 21 CRANKSHAFT AND BEARINGS N52 B25)
| Ground sizes of main bearing journals | | Main bearing journal |
|---|
| Original (designation S1) | Mm | 55.998 ... 55.992 |
| Original (designation S2) | Mm | 55.992 ... 55.987 |
| Original (designation S3) | Mm | 55.987 ... 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 | 0.15 |
ENGINE - TECHNICAL DATA (11 21 CRANKSHAFT AND BEARINGS N52 B25)
| Ground sizes of main bearing journals | | Guide bearing journal |
|---|
| Original (designation S1) | Mm | 64.998 ... 64.992 |
| Original (designation S2) | Mm | 64.992 ... 64.987 |
| Original (designation S3) | Mm | 64.987 ... 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 | 0.15 |
ENGINE - TECHNICAL DATA (11 21 CRANKSHAFT AND BEARINGS N52 B25)
11 21 Crankshaft and Bearings N52 B30
| Grinding stages, crankshaft guide bearing | | |
|---|
| Standard | Mm | 24.0 F8 |
| Size 1 | Mm | 24.2 F8 |
| Size 2 | Mm | 24.4 F8 |
| Crankshaft axial play | Mm | 0.060 ... 0.250 |
ENGINE - TECHNICAL DATA (11 21 CRANKSHAFT AND BEARINGS N52 B30)
| Ground sizes of conrod bearing journals | | |
|---|
| Standard | Mm | 50.00 -0.009 -0.025 |
| Radial conrod bearing play | Mm | 0.025...0.070 |
ENGINE - TECHNICAL DATA (11 21 CRANKSHAFT AND BEARINGS N52 B30)
| Ground sizes of main bearing journals | | Main bearing journal |
|---|
| Original (designation S1) | Mm | 55.998 ... 55.992 |
| Original (designation S2) | Mm | 55.992 ... 55.987 |
| Original (designation S3) | Mm | 55.987 ... 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 | 0.15 |
ENGINE - TECHNICAL DATA (11 21 CRANKSHAFT AND BEARINGS N52 B30)
| Ground sizes of main bearing journals | | Guide bearing journal |
|---|
| Original (designation S1) | Mm | 64.998 ... 64.992 |
| Original (designation S2) | Mm | 64.992 ... 64.987 |
| Original (designation S3) | Mm | 64.987 ... 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 | 0.15 |
ENGINE - TECHNICAL DATA (11 21 CRANKSHAFT AND BEARINGS N52 B30)
11 24 Connecting Rods and Bearings N52 B25
| Ø Large connecting rod eye (without bearing) | Mm | 53.600 +0.016 |
|---|
| Conrod bushing: Inside diameter | Mm | 20 +0.013 +0.004 |
| Connecting rod bearing, installation clearance | Mm | 0.025... 0.061 |
| Permissible total deviation of connecting rods in one engine (without bearing shells) | G | ± 5 |
ENGINE - TECHNICAL DATA (11 24 CONNECTING RODS AND BEARINGS N52 B25)
11 24 Connecting Rods and Bearings N52 B30
| Ø Large connecting rod eye (without bearing) | Mm | 53.600 +0.016 |
|---|
| Conrod bushing: Inside diameter | Mm | 20 +0.013 +0.004 |
| Connecting rod bearing, installation clearance | Mm | 0.025... 0.061 |
| Permissible total deviation of connecting rods in one engine (without bearing shells) | G | ± 5 |
ENGINE - TECHNICAL DATA (11 24 CONNECTING RODS AND BEARINGS N52 B30)
11 25 Pistons with Rings and Pins N52 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 | 0.15 |
ENGINE - TECHNICAL DATA (11 25 PISTONS WITH RINGS AND PINS N52 B25)
| 1st groove | | |
|---|
| End clearance | Mm | 0.18 ... 0.33 |
| Axial play | Mm | 0.020 ... 0.060 |
| 2nd groove | | |
| End clearance | Mm | 0.30 ... 0.50 |
| Axial play | Mm | 0.020 ... 0.060 |
| 3rd groove | | |
| End clearance | Mm | Cannot be measured |
| Axial play | Mm | Cannot be measured |
ENGINE - TECHNICAL DATA (11 25 PISTONS WITH RINGS AND PINS N52 B25)
11 25 Pistons with Rings and Pins N52 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 ... 0.035 |
| Piston installation clearance (piston worn) | Mm | 0.020 ... 0.047 |
| Permissible total wear tolerance between piston and cylinder (engine operated) | Mm | 0.15 |
ENGINE - TECHNICAL DATA (11 25 PISTONS WITH RINGS AND PINS N52 B30)
| 1st groove | | |
|---|
| End clearance | Mm | 0.15 ... 0.30 |
| Axial play | Mm | 0.020 ... 0.070 |
| 2nd groove | | |
| End clearance | Mm | 0.30 ... 0.50 |
| Axial play | Mm | 0.040 ... 0.080 |
| 3rd groove | | |
| End clearance | Mm | Cannot be measured |
| Axial play | Mm | Cannot be measured |
ENGINE - TECHNICAL DATA (11 25 PISTONS WITH RINGS AND PINS N52 B30)
11 31 Camshaft N52 B25
| Guide bearing (width) | Mm | 20.000 +0.052 |
|---|
| Radial runout | Mm | 0.054 ... 0.099 |
| Axial play | Mm | 0.02 ... 0.162 |
ENGINE - TECHNICAL DATA (11 31 CAMSHAFT N52 B25)
11 31 Camshaft N52 B30
| Guide bearing (width) | Mm | 20.000 +0.052 |
|---|
| Radial runout | Mm | 0.054 ... 0.099 |
| Axial play | Mm | 0.02 ... 0.162 |
ENGINE - TECHNICAL DATA (11 31 CAMSHAFT N52 B30)
11 34 Valves with Springs N52 B25
| Plate dia. | | |
|---|
| Inlet | Mm | 32.2 ± 0.05 |
| Exhaust | | 27.0 ± 0.1 |
| Inlet | Mm | 5.0 -0.1 -0.06 |
| Exhaust | Mm | 5.0 -0.1 -0.06 |
ENGINE - TECHNICAL DATA (11 34 VALVES WITH SPRINGS N52 B25)
11 34 Valves with Springs N52 B30
| Plate dia. | | |
|---|
| Inlet | Mm | 34.2 ± 0.05 |
| Exhaust | | 29.0 ± 0.1 |
| Inlet | Mm | 5.0 -0.1 -0.06 |
| Exhaust | Mm | 5.0 -0.1 -0.06 |
ENGINE - TECHNICAL DATA (11 34 VALVES WITH SPRINGS N52 B30)
11 37 Variable valve gear N52 B25
| Axial clearance of eccentric shaft | Mm | 0.050 ... 0.129 |
ENGINE - TECHNICAL DATA (11 37 VARIABLE VALVE GEAR N52 B25)
11 37 Variable valve gear N52 B30
| Axial clearance of eccentric shaft | Mm | 0.050 ... 0.129 |
ENGINE - TECHNICAL DATA (11 37 VARIABLE VALVE GEAR N52 B30)
11 40 Oil Supply N52 B25 /B30
| Oil grades and consumption: refer to BMW Service Operating Fluids in OPERATING FLUIDS - ENGINE | | |
|---|
| Oil change volume with oil filter | Ltr. | 6.5 |
ENGINE - TECHNICAL DATA (11 40 OIL SUPPLY N52 B25/B30)
11 41 Oil Pump with Strainer and Drive N52 B25
| 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 |
ENGINE - TECHNICAL DATA (11 41 OIL PUMP WITH STRAINER AND DRIVE N52 B25)
11 41 Oil Pump with Strainer and Drive N52 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 |
ENGINE - TECHNICAL DATA (11 41 OIL PUMP WITH STRAINER AND DRIVE N52 B30)
