Re: cylinder head compatibility
Flat out: NO. Among other differences the M20 has a belt driven cam, the M52 is chain driven. The distance between bore centers is different. The M52 is DOHC, the M20 is SOHC. None of the coolant or oil passages will line up. They are different lengths and different widths.
Quotes to live by:
guessing gets expensive
nothing is more expensive than a cheap BMW
Ken Kanne, Silverhill, AL, Honorary Forum Grandpa/Craigslist addict/Hoarder of all sorts of stuff
1995 318is "Bebe"; 1993 325is "Elvira" 1985 635CSi "Katja" 1984 633CSi "Sylvia"
I NEED A NAP, DANG IT!