M40 flywheel

[Simon13]

Am i right in thinking..............from my e30 4 pot years that the following is correct.

M40 has a lighter solid flywheel
M42 apart from the early cars had a heavier dual mass?

Are clutches all the same? This should all work in an M43 engined car as the same family line as such.

My M43 badboy e34 needs a clutch and all the help it can get that a lighter flywheel would bring whilst i'm there as its probably the easiest clutch job to do an any BMW.

[jmc330i]

I remember one of the M42 aficionados on here saying he'd never seen a dual mass flywheel on an E30 M42.

[sanitroc1]

I have 1 e36 and 2 e30 m42 motors here and all the flywheels are the same as the m40 .

[magpie]

i've broke 3 318is' ,had g and h reg ones and all of them have had solid flywheels .

[maxfield]

I've got a feeling the M42 had a dual mass flywheel if it had aircon.

[daimlerman]

Stick a proper engine in it,Simon!

[Andyboy]

The only 4 pot M40 type turd to have a DMF was the E36 316i with the 1.9 M43TU and AC. Some M44 Ti's had one as well, but not all. It was when the proper BMW's started to be infected with E46 type nonsense.
The M40 flywheel is what BMW call 'twin mass', i.e solid flywheel but with a sodding great ring of pig iron around the outer edge. Bloody heavy. M40/42/43 clutches are all the same. From what I've seen the pressure plate rarely wears out - if you were really council you could probably get away with just a clutch plate.

[DanThe]

Chuck a lightened M20 fly/clutch in it, will end up lighter than the 4 pot anchor and will take more abuse!