316i question

[Millhouse]

Is it a comman fault for manifold to crack on 316i e30s and can you buy 4 branch manifolds for them ?

[Millhouse]

Anyone ? And is the 318i and the 316i priority much the same engines

[Grrrmachine]

The terms 316i and 318i completely depend on year, as the M10 and M40 engines are very different.

The M40 was reliable and economical; there is absolutely nothing you can do to it to boost performance, so things like manifolds, even if they do exist, will make no difference to the performance. For the older M10 engine there are loads of upgrades, but usually aimed at people running carbs.

As for manifolds cracking - not heard anything in particular, but they can go bendy like any manifold.

[Millhouse]

Cheers mate it's the m40 engine

[daimlerman]

316i/318i/M40 engines share the same block and pistons,the bigger unit has more stroke....not sure about t/b and ECU differences.