The BMW M44 was an inline, four-cylinder petrol engine that was introduced in 1996. The M44B19 engine had an 85.0 mm bore and an 83.5 mm stroke for a capacity of 1895 cc.
The M44 engine had a cast iron block, an aluminium alloy cylinder head, a variable length intake manifold (BMW’s ‘DISA’), double overhead camshafts, four valves per cylinder, a compression ratio of 10.0:1 and a maximum engine speed of 6500rpm.
Compared to its M42 predecessor, changes for the M44 engine included:
- A spheroidal cast-iron crankshaft with four counterweights (the M42 had a forged crankshaft with eight counterweights);
- Redesigned connecting rods and pistons;
- Conical valve springs (previously cylindrical double valve springs);
- A smaller upper valve plate;
- The balance weights in the camshafts were cast with the camshafts themselves;
- A redesigned timing chain tensioner to reduce wear;
- The introduction of Bosch Motronic M 5.2 engine management (previously Bosch Motronic M 1.7);
- A hot film mass air flow sensor (previously a vane-type sensor);
- Adoption of a sound-insulating cross-flow hose in the intake system and an intake silencer to reduce induction noise;
- Roller bearings for the rocker arms; and,
- The variable length intake system which vary lengths 600rpm earlier.
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| Engine | Capacity | Peak power | Peak torque | Models | Years |
|---|---|---|---|---|---|
| M44B19 | 1895 cc | 103kW at 6000rpm | 180Nm at 4300rpm | E36 318is, E36 318ti |
1996-00 |
| E36/7 Z3 1.9i | 1995-99 |
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