Thread: 525i Head
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Old 01-31-2011, 12:21 PM
robertobaggio20 robertobaggio20 is offline
Location: earth
Join Date: Oct 2009
Posts: 3,403
Mein Auto: car
Originally Posted by injunmort View Post
cracked heads are not that common. when you remove it, take it to a machine shop and have them hot tank it. it will come out nice and clean, inspect it for cracks. the head gasket failing is a common problem on these cars. .
Injunmort, my understanding is that you need to pressure test the head to detect cracks and mere visual inspection is worthless when we're dealing with hairline cracks and those cracks that may not be visible on the surface of the head.

Another thing....what do you mean by valve lash and what is involved in adjusting it? Please advise, thanks.
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