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The BMW M88 is a straight-6 DOHC petrol engine which was produced from 1978 to 1989. It is based on the DOHC version of the BMW M49 engine, which was used in the BMW 3.0CSi racing cars. [1] [2] [3] The M88 was produced alongside the BMW M30 engine, as the higher performance engine. In North America up until 1989, the BMW S38 engine was used ...
The BMW S38 is a straight-6 DOHC petrol engine which replaced the M88 and was produced from 1984–1995. [1] [2] The S38 was originally produced for North America as an equivalent to the M88 with slightly lower power output. In 1989, power output of the S38 was increased and it became the worldwide replacement for the M88.
The M635CSi is the first of the BMW M6 model line and is powered by the M88/3 straight-six engine. [3] In North America, the vehicle is badged as "M6" and uses the less powerful BMW S38 engine. [4] The eventual successor to the nameplate, the E63 6 Series, was released in 2004 after a 16-year hiatus.
The BMW M30 is a SOHC straight-six petrol engine which was produced from 1968 to 1995. With a production run of 27 years, it is BMW's longest produced engine and was used in many car models. The first models to use the M30 engine were the BMW 2500 and 2800 sedans. The initial M30 models were produced in displacements of 2.5 litres (2,494 cc ...
It was initially powered by the M102 engine, which is a turbocharged 3.2 L version of the M30 straight-six engine, producing 185 kW (248 hp; 252 PS) at 60 kPa (9 psi) of boost. [20] In 1982, the engine was upgraded to the M106 , which increased the capacity to 3.4 litres and the fuel injection system changed from Jetronic to Motronic .
525e / 528e: The 525e (called 528e in North America and Japan) uses a longer stroke 2.7-litre version of the 6-cylinder M20 petrol engine, is optimised for fuel economy and torque at low engine speed rather than the traditional high revving characteristics of BMW straight-six engines. [17] The "e" stands for the Greek letter eta, for economy.
But looking at technical service bulletins − which can tell a little about specific issues − this engine can have some problems. These include cracks in the block at the cylinder head bolts ...
Straight-six engine BMW M88 This example shows the basic layout of a multi-point injected engine – each cylinder is fitted with its own fuel injector, and each fuel injector has its own fuel line (white parts) going straight into the fuel injection pump (mounted on the right hand side)