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 |
TECHNICAL DATA - ENGINE GENERAL N52K B25
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 |
TECHNICAL DATA - ENGINE 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 |
TECHNICAL DATA - ENGINE GENERAL N52K B30
11 11 Engine Block, Cylinder Crankcase N52K B25
| Bore Z stage 0 (1) | Mm | 82.000 +0.014 |
|---|
| Bore Z stage 00 (1) | Mm | |
| Bore Z stage 1 (1) | Mm | 82.250 +0.014 |
| Permitted out-of-round of cylinder bore (1) | Mm | 0.005 |
| Permitted conicity of cylinder bore (1) | Mm | 0.010 |
| Permissible total wear tolerance between piston and cylinder (engine operated) | Mm | 0.150 |
| (1) new status or recondition |
| (1) | New status or recondition |
TECHNICAL DATA - ENGINE BLOCK, CYLINDER CRANKCASE N52K B25
11 11 Engine Block, Cylinder Crankcase N52K B30
| Bore Z stage 0 (1) | Mm | 85.000 +0.014 |
|---|
| Bore Z stage 00 (1) | Mm | |
| Bore Z stage 1 (1) | Mm | 85.250 +0.014 |
| Permitted out-of-round of cylinder bore (1) | Mm | 0.005 |
| Permitted conicity of cylinder bore (1) | Mm | 0.010 |
| Permissible total wear tolerance between piston and cylinder (engine operated) | Mm | 0.150 |
| (1) new status or recondition |
| (1) | 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 |
| Z Valve seat | | |
| 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 |
| Z Valve seat | | |
| 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 |
| Max. permitted runout at center crankshaft journal | Mm | 0.150 |
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 |
| Max. permitted runout at center crankshaft journal | Mm | 0.150 |
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 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 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 |
| 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 |
TECHNICAL DATA - CRANKSHAFT AND BEARINGS N52K B30
11 24 Connecting Rods and Bearings N52K B25
| Z 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 |
TECHNICAL DATA - CONNECTING RODS AND BEARINGS N52K B25
11 24 Connecting Rods and Bearings N52K B30
| Z 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 |
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 (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 |
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 (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 |
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 play | 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 play | 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 dia. | | |
|---|
| Inlet | Mm | 32.2 ±0.05 |
| Exhaust | Mm | 27.0 ± 0.1 |
| Stem Z | | |
| 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 dia. | | |
|---|
| Inlet | Mm | 34.2 ±0.05 |
| Exhaust | Mm | 29.0 ±0.1 |
| Stem Z | | |
| 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 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 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 (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 B30
