Hi Guys
Were can i find the engine number on 525i m20 engine
I don't know what numbers you need exactly, but I can show you a few.
The Block casting number should be right under the intake manifold on the block:
See this site for a few pics of where numbers are located:
http://e21bimmer323i.yolasite.com/page-8.php
I believe the displacement number is located on the side of the head just above the spark plug holes on the exhaust side of the engine, it should be in the middle somewhere. Yours should have a big "2.5" stamped into it.
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