E34 M20 camshaft in E21 323i?
Posted: Thu Oct 30, 2014 10:51 am
I have a spare M20 engine for my E21 323i sitting in my shed and had a quick look at it to see whether I would refurb it for a spare or strip it for parts. Long and short of it is that the engine looks OK but the camshaft is definitely shot (bad wear on about 3 lobes, probably as the result of poor lubrication). I can pick up a used E34 camshaft (from a 1989 M20 525i) and was wondering whether this will actually fit and secondly, how it rates performance-wise against the original 323i camshaft. Although I have a full spec list for the 323i cam, can't locate full specs for the 525i cam. The stock 525i M20 is rated with a slightly higher output than the stock E21 323i, but was this primarily due to camshaft or head/induction/ignition system changes?
