
BMW 7_aya the E38 series from 1994 to 2002
	1. Introduction
	2. Governing bodies and methods of operation
	3. Settings and routine maintenance of the car
	4. Engine
		4.1. General information and preparatory operations
		4.2. Check of compression pressure
		4.3. Check of the engine by means of the vacuum gage
		4.4. Petrol M60/1 and M60/2 engines
		4.5. M62 engine
		4.6. Diesel M57 engine
		4.7. Diesel M67 engine
	5. Cooling systems of the engine, heating, ventilation and air conditioning
	6. A power supply system and production of the fulfilled gases
	7. Systems of electric equipment of the engine
	8. Manual box of gear shifting and coupling
	9. Automatic transmission
	10. Cardan and power shafts, reducer, differential and stupichny assemblies
	11. Brake system
	12. Suspension bracket and steering
	13. Body
	14. Onboard electric equipment
	15. Schemes of electric equipment

4-dvigatel.html

4. Engine

Specifications

General information and specifications

Operating procedure of cylinders

see Specifications to the Head Sistemy of electric equipment of the engine

M51 engine
Type	Diesel, 6-cylinder, line, OHC
Code designation of the engine	25 6T 1
Trade designation of model, year of release	725 tds, from 1996 to 2002
Diameter of the cylinder//piston stroke, mm	80/82.8
Volume of cylinders, ^cm3	2499
Extent of compression	22:1
Power, кВт@об / mines	105@4600
Turns of H/H, rpm ± 50
Without additional consumers	770
With the included transfer and To/in	750
Maximum frequency of rotation of a bent shaft, rpm	5250 ± 50
Maximum torque, Nm@ob / mines	280@2200
Value of a compression, atm.	more than 20

M52 B 20, M52TU B 20 engines
Type	Petrol, 6-cylinder, line
Diameter of the cylinder//piston stroke, mm	80/66
Volume of cylinders, ^cm3	1991
Extent of compression	11:01
Power, кВт@об / mines	110@5900 (240@5000) *
Maximum frequency of rotation of a bent shaft, rpm	6500
Maximum torque, Nm@ob / mines	190@200 (for M52 B20)
Value of a compression, atm.	10 ÷ 11

* For the M52TU B 20 engine

M52 B 25, M52TU B 25 engines
Type	Petrol, 6-cylinder, line
Diameter of the cylinder//piston stroke, mm	84/75
Volume of cylinders, ^cm3	2494
Extent of compression	10.5:1
Power, кВт@об / mines	125@5500 *
Maximum frequency of rotation of a bent shaft, rpm	6500
Maximum torque, Nm@ob / mines	245@3950 *
Value of a compression, atm.	10 ÷ 11

* Data only for the M52 B 25 engine

M52 B 28, M52TU B 28 engines
Type	Petrol, 6-cylinder, line, DOHC
Code designation of the engine	28 6S 1
Trade designation of model, year of release	728i (728iL), from 1994 to 2001
Diameter of the cylinder//piston stroke, mm	84/84
Volume of cylinders, ^cm3	2793
Extent of compression	10.2:1
Power, кВт@об / mines	142@5300 *
Turns of H/H, rpm ± 50
Without additional consumers	750
With included To/in	780
With the included transfer and To/in	720
Maximum frequency of rotation of a bent shaft, rpm	6500 ± 50
Maximum torque, Nm@ob / mines	280@3950
Value of a compression, atm.	10 ÷ 11

* Data only for the M52 B 28 engine

M57 engine (D 30)
Type	Diesel, 6-cylinder, line, DOHC, with the fuel distributive highway (Common Rail)
Trade designation of model, year of release	730d, from 1998 to 2001
Diameter of the cylinder//piston stroke, mm	84/88
Volume of cylinders, ^cm3	2926
Extent of compression	18:01
Power, кВт@об / mines	135@4000
H/H turns (under any conditions), rpm	750 ± 50
Maximum frequency of rotation of a bent shaft, rpm
At the motionless car	4600 ± 100
During the movement	4800 ± 100
Maximum torque, Nm@ob / mines	410@2000 ÷ 3000

M60/1 engines (B 30) and M60/2 (B 40)
Type	Petrol, V-shaped, 8-cylinder, DOHC
Code designation of the engine	30 8 S1 , 40 8 S1 *
Trade designation of model, year of release
M60/1	730i (730iL), from 1994 to 1996
M60/2	740i (730iL), from 1994 to 1996
Corner between blocks of cylinders, a hail.	90
Diameter of the cylinder//piston stroke, mm
M60/1	84/67.6
M60/2	89/80
Volume of cylinders, ^cm3
M60/1	2997
M60/2	3982
Extent of compression
M60/1	10.5:1
M60/2	10:1
Power, kW @ rpm	125@5500 *
Turns of H/H, rpm
Without additional consumers	600 ± 50
With included To/in	750 ± 50
With included To/in and transfer	750 ± 50
Maximum frequency of rotation of a bent shaft, rpm	6500 ± 50
Value of a compression, atm.	12 ÷ 14

* Data for the M60/1 engine

** Data for the M60/2 engine

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 release
M62 B 35	735i, since 1996
M62 B 44	740i, since 1996
Diameter of the cylinder//piston stroke, mm
M62 B 35	84/78.9
M62 B 44	92/82.7
Volume of cylinders (B 35//B 44), ^cm3	3498/4398
Extent of compression	10: 1
Turns of H/H, rpm
Without additional consumers	580 ± 50
With included To/in	700 ± 50
With included To/in and transfer	700 ± 50
Maximum frequency of rotation of a bent shaft (B 35//B 44), rpm	6200/6100 (((± 50)
Value of a compression, atm.	12 ÷ 14

M67 engine
Type	Diesel, V-shaped, 8-cylinder, DOHC, with the fuel distributive highway (Common Rail)
Trade designation of model, year of release	740d (740dL), since 1999
Diameter of the cylinder//piston stroke, mm	84/88
Volume of cylinders, ^cm3	3901
Extent of compression	18:1
Power, кВт@об / mines	180@4000
H/H turns (with included To/in and (or) transfer), rpm	750 ± 50
Maximum frequency of rotation of a bent shaft, rpm
At the motionless car	4600 ± 100
During the movement	4800 ± 100
Maximum torque, Nm@ob / mines	560@1750 ÷ 2500

M73 engine (B 54)
Type	Petrol, V-shaped, 12-cylinder, OHC
Code designation of the engine	56 12 1
Trade designation of model, year of release	750i (750iL), since 1994
Corner between blocks of cylinders, a hail.	60
Diameter of the cylinder//piston stroke, mm	85/79
Volume of cylinders, ^cm3	5379
Extent of compression	10.0:1
Power, кВт@об / mines	240@5000
Turns of H/H, rpm
Without additional consumers	600 ± 50
With included To/in	700 ± 50
Maximum frequency of rotation of a bent shaft, rpm	6000 ± 50
Maximum torque, Nm@ob / mines	490@3900
Value of a compression, atm.	10 ÷ 12

Block of cylinders

The most admissible gap at wear of details between the piston and the cylinder, mm
M51, M57 (D25), M52 engines	0.015
M60/1, M60/2, M62, M73 engines	0.010

M51 (DTS), M57 (D25) engines
Diameter of the cylinder, mm
New//admissible wear	^{80.000+0.018/}^80.000+0.040
Intermediate size (new//admissible wear)	^{80.080+0.018/}^80.080+0.040
1st repair size (new//admissible wear)	^{80.250+0.018/}^80.250+0.040
Ovality and conicity of the cylinder (new//admissible wear), mm	0.01/0.04
M52 B 20, M52 B 25 engines
Diameter of the cylinder ^{(B 20//B 25)1)}, mm	^{80.000+0.010/}^84.000+0.010
Admissible ovality//conicity ^tsilindra1), mm	0.005/0.010

¹⁾ New or processed

M52 B 28 engine
Diameter ^tsilindra1), mm
Standard	^84.000+0.010
1st repair size	^84.250+0.010
The 2nd repair size (only for pig-iron blocks)	^84.500+0.010
Admissible ovality//conicity ^tsilindra1), mm	0.005/0.010

¹⁾New or processed

M52TU B 20, B 25, B 28 engines
Diameter of the cylinder ^{(B 20//B 25 and B 28) 1)}, mm
Standard	^{80.000+0.010/}^84.000+0.010
The 1st repair size (only for the aluminum block with pig-iron sleeves)	^{80.250+0.010/}^84.250+0.010
Admissible ovality//conicity ^tsilindra1), mm	0.005/0.010

¹⁾ New or processed

M57 engines (D 30), M67
Diameter of the cylinder, mm
New//admissible wear	^{84.000+0.018/}^84.000+0.040
Intermediate size (new//admissible wear)	^{84.080+0.018/}^84.080+0.040
1st repair size (new//admissible wear)	^{84.250+0.018/}^84.250+0.040
Ovality and conicity of the cylinder (new//admissible wear), mm	0.01/0.04

M60/1 engines (B 30), M60/2 (B 40)
Diameter of the new cylinder, mm
M60/1	^84.000+0.014
M60/2	^89.000+0.014
Admissible ovality of the new cylinder, mm	0.007

M62 engines (B 35, B 44, B 46)
Diameter of the new cylinder, mm
B 35	^84.000+0.014
B 44	^92.000+0.014
B 93	^93.000+0.014
Admissible ovality of the new cylinder, mm	0.007
M73 engine (B 54)
Diameter ^tsilindra1), mm
Class 0, A//B size	^{85.000+0.010/}^85.011+0.009
Class 00, A//B size	^{85.080+0.010/}^85.091+0.009
Class 1, A//B size	^{85.250+0.010/}^85.261+0.009
Class 2, A//B size	^{85.500+0.010/}^85.511+0.009
Admissible ovality and conicity ^tsilindra1), mm	0.01

¹⁾ New or processed

Head of the block of cylinders

The directing plugs of valves as spare parts are not delivered. On M51, M57 and M67 engines processing of a head of cylinders is not admissible.

On M57 and M67 engines grinding in of saddles of valves is not admissible.

Oil gap of the valve in the directing plug, mm	0.5
Nominal internal diameter of the installed valve plug., mm
M51, M52, M52TU, M60/1, M60/2, M62 engines (admission of H7)
Nominal	6.0
Class 1//2	6.1/6.2
M57, M67 engines	6 +0.015/+0.03
M73 engine (admission of H7)
Nominal	7.0
Class 1//2	7.1/7.2
Width of the persistent bearing of the camshaft, mm
M51 engine	^21.85-0.08
M52 and M52TU engines	20, admission of d8
M57 and M67 engines	^18.85-0.08
Width of a guide of the bearing of the camshaft, mm
M60/1, M60/2 engines	^18.85-0.08
M62 engine	^21.90-0.06
M73 engine	^21.85-0.08
Nominal height of a head of cylinders (except M51, M57 and M67 engines), mm	140
The admission on processing of a head of cylinders, mm
M52, M52TU, M60/1, M60/2, M62 engines	139.7
M73 engine	139.8
Diameter of bearings of the camshaft of M57, M67 engines, mm	23, admission of the G7
Valve saddle corners (working//external//internal), hail.
M51 engine	45/15///60
Width of a working facet of a saddle of the valve (inlet//final), mm
M51 engine	2.00 ± 0.25//2.75 ± 0.15
M52, M52TU engines	1.65 ± 0.25//1.65 ± 0.25
M57 engines	1.45 ± 0.25//1.45 ± 0.25
M60/1, M60/2, M62 engines (B 35, B 44)	1.25 ± 0.25//1.65 ± 0.35
M62 engine (B 46)	0.95 ± 0.30//1.50 ± 0.35
M67 engine	1.20 ± 0.25//1.43 ± 0.25
M73 engine	1.65 ± 0.25//2.00 ± 0.25
External diameter of a saddle of the valve (inlet//final), mm
M51 engine	35.5/30.6
M52 B 20 engine	29.4/26.4
M52 B 25 and B 28 engines	32.4/29.4
M52TU B 20 engine	29.4/26.5
M52TU B 25 and B 28 engines	32.4/30.0
M60/1, M62 engines (B 35)	31.5/28.0
M60/2, M62 engines (B 44, B 46)	34.5/30.0
M73 engine	41.5/35.6

Bent shaft and flywheel

Nominal diameter of radical necks (yellow//green//white), mm

M51, M52, M52TU engines

59.987 ± 3//59.980 ± 3//59.973 ± 2

M57 engine

59.980 ± 3//59.973 ± 3//59.966 ± 2

M60/1, M60/2, M62, M67, M73 engines

^{69.984+0.006/}^{69.977+0.006/}//^69.971+0.005

M73 engine

^{74.984+0.006/}^{74.977+0.006/}//^74.971+0.005

Diameter of radical necks (class 1//2//3), mm

see nominal diameter there are-0.25//-0.50//-0.75 mm

Radial gap of bearings of a bent shaft, mm

M51, M52, M52TU engines

0.020 ÷ 0.058

M57 engine

0.019 ÷ 0.052

M60/1, M60/2, M62 engines

0.020 ÷ 0.050

M67 engine

0.028 ÷ 0.056

M73 engine

0.026 ÷ 0.052

Axial gap of a bent shaft, mm

M51, M52, M52TU engines

0.080 ÷ 0.163

M57 engine

0.080 ÷ 0.234

M60/1, M60/2, M62, M67, M73 engines

0.085 ÷ 0.257

Sizes of necks of the persistent bearing of a bent shaft, mm (admission of F8)

M51, M52, M52TU, M57 engines

Nominal

25.0

Class 1//2

25.2/25.4

M60/1, M60/2, M62, M67 engines

Nominal

32.0

Class 1//2//3

32.2/32.4///32.6

M73 engine

Nominal

31.0

Class 1//2//3

31.2/31.4///31.6

Marking of conrod bearings of a bent shaft, mm

M51, M52, M52TU, M57, M73 engines

Nominal

45.0	- 0.009
	- 0.025

Class 1//2

44.75	- 0.009	//	44.50	- 0.009
	- 0.025			- 0.025

M60/1, M60/2, M62 engines

Nominal

48.0