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M52B28
Engine overview
Configuration
Inline-6 (I6)
Production years
1995-2000
Vehicles with this engine
Factory specifications
Values from the manufacturer documentation for this engine.
Engine (general)
Engine code
M52 B28
Capacity
2793 cc
Idle speed
725 ± 100 rpm
Normal
10.0 - 11.0 bar
Oil pressure
> 0.5 bar/rpm
Oil pressure
4.0 bar/rpm
Engine (petrol)
Fuel system (make and type)
DME MS41.0
Number of cylinders
6
Firing order
1-5-3-6-2-4
Ignition coil resistance, primary
0.8 ohms
Spark plugs (make and type)
Bosch F7LDCR NGK BKR 6 EK
Spark plug gap
0.7 - 0.8 mm
Injection pressure/system pressure
3.5 ± 0.2 bar
CO exhaust gas
< 0.5 %
CO2
13.0 - 16.0 %
HC
200 ppm
HC
100 ppm
O2
0.1 - 0.5 %
Lambda
0.97 - 1.03
Lambda change (Delta Lambda)
0.02
Oil temperature during test
60 °C
Fast-idle speed
2500 - 3000 rpm
CO at fast-idle speed
< 0.3 %
Closed-loop test at:
350 - 1050 rpm
Conditioning catalytic converter
3 / 3000 min/rpm
Conditioning catalytic converter
4 / 2500 ± 300 min/rpm
Cooling system
Cap pressure
0.9 - 1.1 bar
Thermostat opens at
92 °C
Fan on at
90 °C
Electrical
Battery
70 Ah
Alternator
90 105 A
Brakes
Brake pad thickness, front, min.
10.4 mm
Disc thickness (ventilated), front, min.
20.4 mm
Brake pad thickness, front, min.
3.0 mm
Disc thickness, rear, min.
8.4 mm
Disc thickness (ventilated), rear, min.
17.4 mm
Brake pad thickness, rear, min.
3.0 mm
Disc run-out, max.
0.01 mm
Steering and wheel alignment
Toe-in, front
0°18' ± 08' °
Toe-in, rear
0°24' ± 06' °
Camber, front
-0°40' ± 30' (-> 1995) -0°30' ± 30' (1995 ->) °
Castor, front
3°44' ± 30' °
Camber, rear
-1°40' ± 15' °
Camber, front
-0°58' ± 30' (-> 1995) -0°51' ± 30' (1995 ->) °
Castor, front
-0°40' ± 30' (-> 1995) 3°50' ± 30' (1995 ->) °
Camber, rear
-2°00' ± 15' °
Camber, front
0°07' ± 30' (-> 1995) 0°03' ± 30' (1995 ->) °
Castor, front
3°26' ± 30' °
Camber, rear
-1°00' ± 15' °
Wheels and tyres
Tyre size
205/60R15
Optional
225/55R15
Front tyre pressure
2.0 - 2.5 bar
Rear tyre pressure
2.3 - 3.0 bar
Capacities
Engine sump, incl. filter
6.5 l
Manual transmission
S5D 310Z
Gearbox refill
1.2 l
Automatic transmission
A5S 310Z (5HP18)
Gearbox refill
3.3 l
Initial filling
8.9 l
Automatic transmission
A5S 300J (Jatco)
Initial filling
8.1 l
Differential
1.4 (188N) l
Cooling system
10.0 l
Air-conditioner refrigerant
1000 ± 25 / 825 ± 25 g
Air-conditioner compressor oil
120 ± 20 / 150 ± 10 ml
Torque settings
Cylinder head bolts — Stage 1
40 Nm
Cylinder head bolts — Stage 1
30 Nm
Cylinder head bolts — Stage 2
90 °
Cylinder head bolts — Stage 3
90 °
Spark plugs
30 Nm
Wheel bolts
120 ± 10 Nm
Front hub
290 Nm
Rear hub
M22: 200 M24: 250 M27: 300 Nm
Emissions
Emission code
70/220*1996/69
Emission standard
Euro 2
CO2 average
218 g/km
CO
0.938 g/km
HC NOx
0.371 g/km
CO2 average
241 - 243 g/km
CO
0.141 - 0.902 g/km
HC NOx
0.071 - 0.340 g/km
CO2 average
241 g/km
CO
0.141 - 0.595 g/km
HC NOx
0.071 - 0.118 g/km
CO2 average
221 g/km
CO2 average
248 g/km
CO
0.902 g/km
HC NOx
0.340 g/km
Emission code
70/220*1998/69
CO2 average
223 g/km
CO
1.179 g/km
HC
0.110 g/km
NOx
0.016 g/km
CO2 average
243 g/km
CO2 average
247 g/km
CO
0.549 g/km
HC
0.079 g/km
NOx
0.054 g/km
Workshop procedures for this engine
Step-by-step procedures from the workshop database.
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Who makes these pages, and how TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.
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The story behind TorqFix → Workshop data on this page last updated 22 Aug 2026.
