BMW M42 :
The BMW M42 is a DOHC 16-valve I4 piston engine first built for the E30 318is 1989 year model. The engine block is based on the BMW M40, used on the 318i, but had distinctive features such as double overhead cams driven by a timing chain, hydraulic valve lifters, and an increased 10:1 compression ratio.
Profile gaskets on M42s built before 1993 are known to fail prematurely.
Models
Engine
Displacement
Power
Torque
Redline
Year
M42B18
1.8 L (1796 cc/109 in³)
100 kW (136 ps) @ 6000
172 N·m (127 ft·lbf) @ 4600
6500
1989
103 kW (140 ps) @ 6000
175 N·m (129 ft·lbf) @ 4500
6300
1992
M42B18:
Displacement for the M42B18 was 1.8 L (1796 cc). E30 318iS, 318i (in the U.S.; European versions of the 318i were fitted with the M40 engine), and early E36 318iS/318ti (prior to 1992) models were fitted with versions producing 100 kW (134 HP) and 172 N·m (127 ft·lbf). Later, change in the overhead cam design helped to achieve 103 kW (138 HP) and 175 N·m (129 ft·lbf) coping with the increased weight of the E36 models. The engine uses Bosch M1.7 fuel injection.
The M42 makes for a nice engine swap for 2002's and E21's. It makes for a relatively inexpensive swap, and makes more power than the M10's while still being lighter, plus it uses modern EFI and direct-ignition and a much improved valvetrain.
Applications:
1989-1991 E30 318iS/U.S. model 318i
1992-1996 E36 318i/318iS/318ti
1993-1995 E36 318i - (Produced in South Africa for South African market only).
M42 - Straight 4 cylinder DOHC 16V. 1989-1996. 100kg 220lbsUsed in E30 and E36 318is, Z31.8 (138-142bhp)
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