Just change the head?

[Jona1971]

Hello,

I have a 318i 1987 with an auto 'box (which I want to keep).

I like it the way it is, except I'd like a bit more power.

Here's the question (sorry if it sounds thick):

Can I just fit the top end of a 318iS engine to the top of my M10B18? With all the ancillaries obviously.

Sounds like a nice way to get an extra 40bhp.

Cheers,
Jona

[jmc330i]

Don't think so. If only an extra 40bhp was that easy

[ross_jsy]

No, but why wouldn't you just fit an m42 anyway? Probably be cheaper by the time you have bought a head, head gasket, bolts etc

[jimbom30cab]

Not possible to do this

[jmc330i]

No, but why wouldn't you just fit an m42 anyway? Probably be cheaper by the time you have bought a head, head gasket, bolts etc

I don't think an M42 will bolt up to an M10 auto box, so he'd also need to change that.

[ross_jsy]

Skipped the bit about the auto. I'd want to be getting that changed anyway

[Jona1971]

Thanks chaps, I just thought if the sumps were interchangeable the bottom end may be the same - and its already attached to the auto box, prop, etc...

Am I right in thinking the displacement is the only thing similar between an M10 and a M42?