m90

Have been thinking long and hard about the direction I would want to take the M90 engine when it gets pulled out. Minimum I would want to take the head off from the block and have it inspected then if all is well then replace the gaskets and seals and call it a day. I was also looking to...

Looking to sell my 1981 635CSi project. I bought it from the original owner who imported it from Germany. It lived in Texas before being brought to Colorado in the early 2000's. I bought it non running and have rebuilt the head and headgasket and gotten it road worthy again with Motronic 1.3...

Hello E9ers, I have access to this engine and would like to seek the input of those that know the difference between the M30 and M90. Is this an M90 or has someone put an early intake manifold on a later 3.5 block? I have done a fair bit of research but trying to interpret it all has me...