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- Engine specifications
Engine specifications (BMW 7 Series E38)
General information and technical data
Cylinder Firing Order - See Chapter Specifications Engine electrical systems.
Engine M51 | |
| Type | Diesel, 6-cylinder, in-line, OHC |
| Engine code designation | 25 6T 1 |
| Trade designation of model, year of manufacture | 725 tds, from 1996 to 2002 |
| Cylinder diameter//piston stroke, mm | 80//82.8 |
| Cylinder capacity, cm³ | 2499 |
| Compression ratio | 22:1 |
| Power, kW@rpm | 105@4600 |
| Idle speed, rpm±50 | |
| 770 |
| 750 |
| Maximum crankshaft speed, rpm | 5250±50 |
| Maximum torque, Nm@rpm | 280@2200 |
| Compression value, atm. | more than 20 |
Engines M52 B 20, M52TU B 20 | |
| Type | Petrol, 6-cylinder, in-line |
| Cylinder diameter//piston stroke, mm | 80//66 |
| Cylinder capacity, cm³ | 1991 |
| Compression ratio | 11:01 |
| Power, kW@rpm | 110@5900 (240@5000)* |
| Maximum crankshaft speed, rpm | 6500 |
| Maximum torque, Nm@rpm | 190@200 (for M52 B20) |
| Compression value, atm. | 10÷11 |
* For engine M52TU B 20
Engines M52 B 25, M52TU B 25 | |
| Type | Petrol, 6-cylinder, in-line |
| Cylinder diameter//piston stroke, mm | 84//75 |
| Cylinder capacity, cm³ | 2494 |
| Compression ratio | 10.5:1 |
| Power, kW@rpm | 125@5500* |
| Maximum crankshaft speed, rpm | 6500 |
| Maximum torque, Nm@rpm | 245@3950* |
| Compression value, atm. | 10÷11 |
* Data only for engine M52 B 25
Engines M52 B 28, M52TU B 28 | |
| Type | Petrol, 6-cylinder, in-line, DOHC |
| Engine code designation | 28 6S 1 |
| Trade designation of model, year of manufacture | 728i (728iL), from 1994 to 2001 |
| Cylinder diameter//piston stroke, mm | 84//84 |
| Cylinder capacity, cm³ | 2793 |
| Compression ratio | 10.2:1 |
| Power, kW@rpm | 142@5300* |
| Idle speed, rpm±50 | |
| 750 |
| 780 |
| 720 |
| Maximum crankshaft speed, rpm | 6500±50 |
| Maximum torque, Nm@rpm | 280@3950 |
| Compression value, atm. | 10÷11 |
* Data only for engine M52 B 28
Engine M57 (D 30) | |
| Type | Diesel, 6-cylinder, in-line, DOHC, with fuel injection rail (Common Rail) |
| Trade designation of model, year of manufacture | 730d, from 1998 to 2001 |
| Cylinder diameter//piston stroke, mm | 84//88 |
| Cylinder capacity, cm³ | 2926 |
| Compression ratio | 18:01 |
| Power, kW@rpm | 135@4000 |
| Idle speed (under any conditions), rpm | 750±50 |
| Maximum crankshaft speed, rpm | |
| 4600±100 |
| 4800±100 |
| Maximum torque, Nm@rpm | 410@2000÷3000 |
Engines M60/1 (B 30) and M60/2 (B 40) | |
| Type | Petrol, V-shaped, 8-cylinder, DOHC |
| Engine code designation | 30 8 S1*, 40 8 S1** |
| Trade designation of model, year of manufacture | |
| 730i (730iL), from 1994 to 1996 |
| 740i (730iL), 1994 to 1996 |
| Angle between cylinder blocks, deg. | 90 |
| Cylinder diameter//piston stroke, mm | |
| 84//67.6 |
| 89//80 |
| Cylinder capacity, cm³ | |
| 2997 |
| 3982 |
| Compression ratio | |
| 10.5:1 |
| 10:1 |
| Power, kW @ rpm | 125@5500* |
| Idle speed, rpm | |
| 600±50 |
| 750±50 |
| 750±50 |
| Maximum crankshaft speed, rpm | 6500±50 |
| Compression value, atm. | 12÷14 |
* Data for engine M60/1
** Data for engine M60/2
M62 Engines (B 35, B 44) | |
| Type | Petrol, V-shaped, 8-cylinder, DOHC |
| Code designation (B 35, B 44) | 35 8 S1//44 8 S1 |
| Trade designation of model, year of manufacture | |
| 735i, since 1996 |
| 740i, since 1996 |
| Cylinder diameter//piston stroke, mm | |
| 84//78.9 |
| 92//82.7 |
| Cylinder capacity (B 35//B 44), cm³ | 3498//4398 |
| Compression ratio | 10: 1 |
| Idle speed, rpm | |
| 580±50 |
| 700±50 |
| 700±50 |
| Maximum crankshaft speed (B 35//B 44), rpm | 6200//6100 (±50) |
| Compression value, atm. | 12÷14 |
Engine M67 | |
| Type | Diesel, V-shaped, 8-cylinder, DOHC, with fuel distribution rail (Common Rail) |
| Trade designation of model, year of manufacture | 740d (740dL), since 1999 |
| Cylinder diameter//piston stroke, mm | 84//88 |
| Cylinder capacity, cm³ | 3901 |
| Compression ratio | 18:1 |
| Power, kW@rpm | 180@4000 |
| Idle speed (with air conditioning and (or) gear on), rpm | 750±50 |
| Maximum crankshaft speed, rpm | |
| 4600±100 |
| 4800±100 |
| Maximum torque, Nm@rpm | 560@1750÷2500 |
Engine M73 (B 54) | |
| Type | Petrol, V-shaped, 12-cylinder, OHC |
| Engine code designation | 56 12 1 |
| Trade designation of model, year of manufacture | 750i (750iL), since 1994 |
| Angle between cylinder blocks, deg. | 60 |
| Cylinder diameter//piston stroke, mm | 85//79 |
| Cylinder capacity, cm³ | 5379 |
| Compression ratio | 10.0:1 |
| Power, kW@rpm | 240@5000 |
| Idle speed, rpm | |
| 600±50 |
| 700±50 |
| Maximum crankshaft speed, rpm | 6000±50 |
| Maximum torque, Nm@rpm | 490@3900 |
| Compression value, atm. | 10÷12 |
Cylinder block
Maximum allowable clearance for wear of parts between piston and cylinder, mm | |
| Engines M51, M57 (D25), M52 | 0.015 |
| Engines M60/1, M60/2, M62, M73 | 0.010 |
Engines M51 (DTS), M57 (D25) | |
| Cylinder diameter, mm | |
| New//permissible wear | 80.000+0.018//80.000+0.040 |
| Intermediate size (new//permissible wear) | 80.080+0.018//80.080+0.040 |
| 1st repair size (new//permissible wear) | 80.250+0.018//80.250+0.040 |
| Ovality and taper of the cylinder (new//permissible wear), mm | 0.01//0.04 |
| Engines M52 B 20, M52 B 25 | |
| Cylinder diameter (B 20//B 25)1), mm | 80.000+0.010//84.000+0.010 |
| Permissible ovality//taper of the cylinder1), mm | 0.005//0.010 |
1) New or refurbished
Engine M52 B 28 | |
| Cylinder diameter1), mm | |
| 84.000+0.010 |
| 84.250+0.010 |
| 84.500+0.010 |
| Permissible ovality//taper of the cylinder1), mm | 0.005//0.010 |
1)New or refurbished
Engines M52TU B 20, B 25, B 28 | |
| Cylinder diameter (B 20//B 25 and B 28)1), mm | |
| 80.000+0.010//84.000+0.010 |
| 80.250+0.010//84.250+0.010 |
| Permissible ovality//taper of the cylinder1), mm | 0.005//0.010 |
1) New or refurbished
Engines M57 (D 30), M67 | |
| Cylinder diameter, mm | |
| 84.000+0.018//84.000+0.040 |
| 84.080+0.018//84.080+0.040 |
| 84.250+0.018//84.250+0.040 |
| Ovality and taper of the cylinder (new//permissible wear), mm | 0.01//0.04 |
Engines M60/1 (B 30), M60/2 (B 40) | |
| Diameter of new cylinder, mm | |
| 84.000+0.014 |
| 89.000+0.014 |
| Permissible ovality of a new cylinder, mm | 0.007 |
M62 Engines (B 35, B 44, B 46) | |
| Diameter of new cylinder, mm | |
| 84.000+0.014 |
| 92.000+0.014 |
| 93.000+0.014 |
| Permissible ovality of a new cylinder, mm | 0.007 |
| Engine M73 (B 54) | |
| Cylinder diameter1), mm | |
| 85.000+0.010//85.011+0.009 |
| 85.080+0.010//85.091+0.009 |
| 85.250+0.010//85.261+0.009 |
| 85.500+0.010//85.511+0.009 |
| Permissible ovality and taper of the cylinder1), mm | 0.01 |
1) New or refurbished
Cylinder head
Valve guides are not available as spare parts. Cylinder head machining is not permitted on M51, M57 and M67 engines.
On M57 and M67 engines, lapping of valve seats is not permitted.
Valve oil clearance in the guide bushing, mm | 0.5 |
| Nominal internal diameter of the installed valve sleeve, mm | |
| |
| 6.0 |
| 6.1//6.2 |
| 6 +0.015/ +0.03 |
| |
| 7.0 |
| 7.1//7.2 |
| Width of camshaft thrust bearing, mm | |
| 21.85-0.08 |
| 20, tolerance d8 |
| 18.85-0.08 |
| Width of camshaft bearing guide, mm | |
| 18.85-0.08 |
| 21.90-0.06 |
| 21.85-0.08 |
| Nominal cylinder head height (except for engines M51, M57 and M67), mm | 140 |
| Cylinder head machining tolerance, mm | |
| 139.7 |
| 139.8 |
| Bearing diameter of camshaft of engines M57, M67, mm | 23, G7 tolerance |
| Valve seat angles (working//external//internal), hail. | |
| 45//15//60 |
| Width of the working chamfer of the valve seat (inlet//outlet), mm | |
| 2.00±0.25//2.75±0.15 |
| 1.65±0.25//1.65±0.25 |
| 1.45±0.25//1.45±0.25 |
| 1.25±0.25//1.65±0.35 |
| 0.95±0.30//1.50±0.35 |
| 1.20±0.25//1.43±0.25 |
| 1.65±0.25//2.00±0.25 |
| Valve seat outer diameter (inlet//outlet), mm | |
| 35.5//30.6 |
| 29.4//26.4 |
| 32.4//29.4 |
| 29.4//26.5 |
| 32.4//30.0 |
| 31.5//28.0 |
| 34.5//30.0 |
| 41.5//35.6 |
Crankshaft and flywheel
Nominal diameter of main journals (yellow // green // white), mm | ||||||||||||
| 59.987±3//59.980±3//59.973±2 | |||||||||||
| 59.980±3//59.973±3//59.966±2 | |||||||||||
| 69.984+0.006//69.977+0.006//69.971+0.005 | |||||||||||
| 74.984+0.006//74.977+0.006//74.971+0.005 | |||||||||||
| Main journal diameter (class 1 // 2 // 3), mm | see nominal diameter -0.25//-0.50//-0.75 mm | |||||||||||
| Radial clearance of crankshaft bearings, mm | ||||||||||||
| 0.020÷0.058 | |||||||||||
| 0.019÷0.052 | |||||||||||
| 0.020÷0.050 | |||||||||||
| 0.028÷0.056 | |||||||||||
| Engine M73 | 0.026÷0.052 | |||||||||||
| Crankshaft axial clearance, mm | ||||||||||||
| 0.080÷0.163 | |||||||||||
| 0.080÷0.234 | |||||||||||
| 0.085÷0.257 | |||||||||||
| Dimensions of crankshaft thrust bearing journals, mm (F8 tolerance) | ||||||||||||
| ||||||||||||
| 25.0 | |||||||||||
| 25.2//25.4 | |||||||||||
| ||||||||||||
| 32.0 | |||||||||||
| 32.2//32.4//32.6 | |||||||||||
| ||||||||||||
| 31.0 | |||||||||||
| 31.2//31.4//31.6 | |||||||||||
| Marking of connecting rod bearings of the crankshaft, mm | ||||||||||||
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| 53.975 | |||||||||||
| Radial clearance between liners and crankshaft journal, mm | ||||||||||||
| 0.020÷0.055 | |||||||||||
| 0.016÷0.055 | |||||||||||
| 0.016÷0.058 | |||||||||||
| Permissible radial runout on the center journals of main bearings (the shaft rests on the outer journals of the main bearings), mm | ||||||||||||
| 0.15 | |||||||||||
| 0.20 | |||||||||||
| Maximum permissible runout on the outer diameter of the flywheel, mm | ||||||||||||
| 0.6 | |||||||||||
| 0.3 | |||||||||||
| 0.4 | |||||||||||
| 0.3 | |||||||||||
| Maximum permissible radial//axial runout of the torsional vibration damper, mm | ||||||||||||
| 0.2//0.4 | |||||||||||
| 0.2//0.3 | |||||||||||
Connecting rods
Diameter of the lower one-piece connecting rod head (without bearing), mm | ||||
| 48.000÷48.016 | |||
|
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| 52.000÷52.013 | |||
| Connecting rod hole for connecting rod head bushing, mm | ||||
|
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| Inner diameter of connecting rod lower head bushing, mm | ||||
|
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| 22.005+0.005 | |||
| Allowable difference in weight of connecting rods (without bearing shells), g | ||||
| ±4 | |||
| ±3 | |||
| Distance between connecting rod head centers, mm | ||||
| 137.6//135 | |||
| 155 | |||
Pistons with rings and piston pins
Replacement of the piston and pin is only permitted together.
Measuring point "A" (position), mm | |
| 12 |
| 7 |
| 8//10//14 |
| 6.5//5.5 |
| 14 |
| 22//12//21.5 |
| Piston diameter (at measurement point "A"), mm | |
| |
| 83.950±0.009 |
| 83.955±0.009 |
| 79.960±0.009 |
| 79.985+0.009//83.980+0.009 |
| 83.976÷83.994 |
| 88.976÷88.994 |
| 91.976÷91.994 |
| 92.980÷92.000 |
| |
| 84.030±0.009 |
| 80.040±0.009 |
| |
| 84.200±0.009 |
| 80.210±0.009 |
| 84.230+0.009 |
| 80.235+0.009//84.230+0.009 |
| |
| 84.230+0.009 |
| Engine M73 | |
| 84.976+0.014//84.991+0.013 |
| 85.056+0.014//85.071+0.013 |
| 85.226+0.014//85.241+0.013 |
| 85.476+0.014//85.491+0.013 |
| Clearance between piston and cylinder block bore, mm | |
| 0.041÷0.077 |
| 0.036÷0.059 |
| 0.031±0.063 |
| 0.01÷0.04 |
| 0.006÷0.038 |
| 0.006÷0.034 |
| 0.010+0.024 |
| Piston ring gap (upper//middle//lower), mm | |
| 0.2÷0.4 |
| 0.1÷0.3//0.2÷0.4//0.2÷0.4 |
| 0.1÷0.3//0.2÷0.4//0.25÷0.50 |
| 0.20÷0.35//0.30÷0.45//0.2÷0.4 |
| 0.1÷0.3//0.2÷0.4//0.4÷1.4 |
| 0.1÷0.3//0.2÷0.4//0.2÷0.9 |
| 0.15÷0.35//0.2÷0.4//0.4÷1.4 |
| Piston ring seat clearance (upper//middle//lower), mm | |
| no measurement required//0.040÷0.072//0.030÷0.065 |
| no measurement required//0.05÷0.09//0.03÷0.07 |
| 0.020÷0.055 |
| 0.02÷0.06//0.030÷0.065//0.02÷0.06 |
| 0.020÷0.055 // 0.020÷0.055 // no measurement required |
| 0.030÷0.065//0.060÷0.065/ measurement not required |
| 0.02÷0.06//0.02÷0.06//measurement not required |
| 0.02÷0.07//0.02÷0.06//0.02÷0.06 |
Camshaft and valves
Thrust bearing width (intake//exhaust shaft), mm | ||||||||
| 22.0+0.1 | |||||||
| 20, tolerance H8//H9 | |||||||
| 19.0+0.1 | |||||||
| 28.95+0.10 | |||||||
| 21.10+0.10 | |||||||
| 16.0+0.1 | |||||||
| Camshaft play (radial//axial), mm | ||||||||
| 0.040÷0.081//0.15÷0.33 | |||||||
| 0.020÷0.054//0.15÷0.33 | |||||||
| 0.047÷0.088//0.15÷0.33 | |||||||
| 0.040÷0.074//0.10÷0.28 | |||||||
| 0.040÷0.074//0.20÷0.36 | |||||||
| Nominal diameter of valve plate (inlet//outlet), mm | ||||||||
| 36//31 | |||||||
| 30//27 | |||||||
| 33//30.5 | |||||||
| 25.9 | |||||||
| 32.0//28.5 | |||||||
| 35.0//30.5 | |||||||
| 42 // 36 | |||||||
| Valve plate repair dimensions (R1//R2), mm | 0.2//0.4 | |||||||
| Valve stem diameter (inlet//outlet), mm | ||||||||
| ||||||||
| 6.97/5.97-0.015//6.95/5.96-0.015 | |||||||
| 6.07/7.07-0.015//6.17/7.17-0.015 | |||||||
| 6.06/7.06-0.015//6.16/7.16-0.015 | |||||||
| Engines M52, M52TU, M60/1, M60/2, M62 | ||||||||
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| Engines M57, M67 | 5.970.01 | |||||||
| Engine M73 | ||||||||
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Lubrication system
Engine oil pressure at idle speed, atm, not less than | 0.5 |
| Adjustable pressure in the lubrication system, atm | |
| 3.8 |
| 4.0 |
| 4.20.5 |
| 4.5 |
| 4.3±0.2 |
| Engine oil pressure when the low oil pressure switch is turned on, atm. | 0.2÷0.5 |
Tightening force of threaded connections, Nm
Cylinder head cover mounting bolts (thread M6//M7) | 10//15 |
| Fastening the distributor housing to the cylinder head (thread M6//M7) | 15//20 |
| Threaded plug of the cylinder head oil channel (m57 engine) | 20 |
| Plugs in the cylinder head for bleeding the cooling system (m67 engine) | 2 |
| M51 Engine Cylinder Head Bolts | |
| 80 |
| Give it half a turn |
| 50 |
| Pull to a 90 degree angle |
| Pull to a 90 degree angle |
| Warm up the engine for 25 minutes and turn it to an angle of 90 degrees |
| Cylinder head mounting bolts for M52 engine with cast iron//aluminium cylinder block | |
| 30//40 |
| Pull to a 90 degree angle |
| Pull to a 90 degree angle |
| Engine cylinder head mounting bolts M73//M60 and M62 | 30, then pull twice to an angle of 60°//80° |
| Bolt securing sprocket to camshaft flange | |
| 15 |
| 5, then 20 |
| 10//15 |
| Bolt* securing sprocket to camshaft | |
| 20+35° |
| 20+90° |
| Camshaft Bearing Cap Fastener (thread M6//M7//M8) | 10//14//20 |
| Fastening the splined shaft to the intake camshaft (m52 engine) | 40 + 60° |
| Turbocharger to exhaust manifold mounting nuts | |
| 50 |
| Hollow bolt of the oil supply line to the turbocharger and cylinder block (head) | 25 |
| Turbocharger Hose Clamps (engines M57, M67) | 6 |
| Engine oil drain plug (thread M12//M18//M22) | 25//35//60 |
| Bolts securing the upper section of the engine oil pan to the cylinder block | |
| 10 |
| 12 |
| 22 |
| Oil pan to oil pan upper section mounting bolts | |
| 10 |
| 12 |
| 22 |
| Hollow bolt for fastening the oil drain channel to the oil filter and the upper section of the oil pan (engines M60, M62, M73) | 30 |
| Hollow bolt for fastening the oil line for lubrication of bearing beds and camshaft cams | 10 |
| Bolt for fastening the camshaft cam lubrication oil line to the cylinder head | |
| 10 |
| 5 |
| Hollow bolt for fastening the oil drain channel from the crankcase ventilation system oil separator to the upper part of the oil pan (m62 engine) | 25 |
| Bolts (M6//M7//M8//M10) timing chain cover fasteners | 10//15//22//47 |
| Timing chain tensioner cap nut | 40 |
| Timing Chain Tensioner Plunger Cylinder Fastener | |
| 45 |
| 70 |
| 50 |
| Timing chain guide and tensioner plate mounting bolts (engine M57//M67) | 20//26 |
| Flywheel mounting bolts | |
| 105 |
| 120 |
| 120 |
| Torsional vibration damper mounting bolts | 22 |
| Nut* for fastening the drive belt pulley to the crankshaft | 190 |
| Bolts* for fastening the vibration damper hub to the crankshaft | |
| 410 |
| |
| 100 |
| pull to an angle of 60° |
| pull to an angle of 60° |
| extend to an angle of 30° |
| 100, then pull twice to an angle of 60° |
| 40, then pull twice to an angle of 60° |
| Oil pump mounting bolts | 23 |
| Oil pump cover mounting bolts | 10 |
| Oil pump sprocket mounting nut (thread M6//M10) | 10//35 |
| Fastening the intake manifold to the cylinder head (thread M6 // M7 // M8) | 10 // 15 // 22 |
| Fastening the sound-absorbing casing to the bracket (engines M60, M62) | 8 |
| Exhaust manifold mounting nuts* | |
| 10 |
| 20 |
| 15 |
| 20 |
| 23 |
* Use new fasteners
The article was copied from an online resource «www.bmwman.ru»
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- General information
- Introduction to guide
- Manual
- Maintenance
- Power unit
- Engine M60/1, M60/2 (petrol)
- M62 engine (petrol)
- M57 engine (diesel)
- M67 engine (diesel)
- Cooling system
- Fuel system (petrol)
- Fuel system (diesel)
- Exhaust system
- Ignition and control systems
- Charge and launch systems
- Transmission
- Clutch
- Mechanical gearbox
- Automatic gearbox
- Cardan and drive shafts
- Chassis
- Brake system
- Front suspension
- Rear suspension
- Steering
- Body
- Exterior
- Interior
- Electrical equipment
- Equipment and devices
- Lighting
- Heating and air conditioning
- Electrical circuits
- General information
- Care and maintenance
- Power unit
- Minor engine repair
- Engine overhaul
- Lubrication system
- Cooling system
- Ignition system
- Supply system
- Injection system (petrol)
- Injection system (diesel)
- Exhaust system
- Transmission
- Clutch
- Manual gearbox
- Automatic gearbox
- Cardan gear
- Rear axle and shafts
- Chassis
- Front suspension
- Rear suspension
- Steering
- Wheels and tires
- Brake system
- Body
- Body elements
- Electrical equipment
- Equipment and devices
- Electrical circuits
