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Thread: 525i Head
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Old 02-23-2011, 09:45 AM
v8thumper v8thumper is offline
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Location: phx, az
Join Date: Feb 2011
Posts: 7
Mein Auto: 525i
Hey guys, sorry to be so late to the party.

I just recently finished replacing an M50 head on my Papa-in-law's 525i for the exact same reason Rick is; all cracked up. Papa's car has 255k miles (zoikes!) and is in incredibly good shape overall, so it was certainly worth the time and resources to repair.

Rick, one bump in the road that I ran into: check your 'new' cyl head for head bolt washers. The cyl head that I found to replace Papa's turned out to be a replacement head (i.e. originally came out of a parts department vs. off the assembly line on a car). It turns out that assembly line heads have the head bolt washers swaged into the head, whereas replacement heads do not. Of course, new head bolts do not include head bolt washers. Simple solution... I ground the aluminum swages out of the old head, extracted the washers, and installed in the new (replacement) head. Just FYI, if nothing else
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