Engine conversion question (E30 M10B18 > E21)

[E21noob]

I am wondering if anyone can tell me whether an M10B18 from an E30 will fit my E21, and my 245 gearbox?

Thanks

[nas80]

yes it will, but the exhaust and inlet manifolds have different size ports, the oil pan is different and so are the engine mounts, the wiring is also different obviously.

[E21noob]

I see. so not really an easy swap. thanks for taking the time to answer nas.

[Jeroen]

Big issues with your own engine?

[E21noob]

Not at all. But the kms are clocking up and a cheap M10B18 came up. If it was an easy swap, I was thinking of buying it and store it till the time was right for a swap.

[Reck]

I see. so not really an easy swap.

Not at all - other than the bits Nas mentioned it's a straight swap pretty much. Really easy to swap those bits across from your current M10. We've just fitted an E30 M10 in my car - see my build thread in the modified section.