The BMW M42 is a DOHC straight-four petrol engine which was produced from 1989-1996. [1] It is BMW's first mass-production DOHC engine and was produced alongside the BMW M40 SOHC four-cylinder engine as the higher performance engine. The M42 was replaced by the BMW M44, which was introduced in 1996.

Apr 11, 2025 · The M42B18 engine features a cast-iron cylinder block, an aluminum head with a chain-driven double overhead camshafts (DOHC) and two valves per cylinder (16 in total) with hydraulic tappets. Cylinder bore and piston stroke are …

Sep 25, 2018 · Follow along as we outline the parts needed and the procedure to update an M42 engine with a more modern M44 timing lower timing chain cover and solve the common deflection wheel failure. Previous

Block. The M42 Block is a development of the earlier M40 block, meaning it is possible to use an M40 block to repair an M42 engine. There is also a forwards compatibility with the M44 engine from the E36.

The new M42 Engine includes a two-section "Differential Air Intake System" (D.I.S.A.) and an adaptive-selective knock control system as well as other design changes. With these changes the revised M42 engine develops 137 hp (103 kW) at 6000 rpm and a maximum torque of 175 Nm (129 lb-ft) at 4600 rpm.

Dec 14, 2005 · so does anyone know whether an M44 block will mate straight up to an m42 front timing case, sump, head etc? And is the M43b19 the same casting as the M44 - I've found a 2001 e46 m43b19 block which I think would be perfect. thanks in …

Feb 3, 2005 · The S14 is built off the dimensions of the early M10 4-cylinders, whereas the M42 and M44 were built off the much shorter (dimensionally) M40. An M42 is about 3" shorter than an S14. So, to answer your question....none of the S14 internal parts will fit the M42.

Mar 12, 2023 · To convert an M40 to an M42, you need a complete and functional M42 donor engine. Move over EVERYTHING from the M42 donor engine to the bare M40 block. The only benefit is keeping the car's original engine block with serial number and model (18 4 S1 vs 18 4 S2). This is useful in countries that frown upon engine swaps.

how good is the m42 block? « on: June 22, 2009, 04:39:16 PM » I had a blown head gasket, and after getting the head back from the machine shop, I´ve been collecting seals, hoses, sensors, gaskets, etc. to put it all back together, thinking if I replace all those worn out parts, I´ll probably won´t have to worry about them anytime soon.

Sep 10, 2020 · Hi there. here is my build and i hope i will find some people able to help me out with my issues. first things first, here is a non exhaustive list of the engine parts. - M44 block with M44 crank - E36 M42 head, ported, oversize valves …