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E34 (1989 - 1995)

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Old 02-23-2011, 01:01 PM
ricks5series ricks5series is offline
Officially Welcomed to the 'Fest
Location: So. Ca
Join Date: Dec 2008
Posts: 517
Mein Auto: 525i, Corvette, 530i
Originally Posted by v8thumper View Post
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
All is OK with mine. Washers fit right into the rebuilt head.

Don't know how far back you've read but if you have anything else to add, it'll be great.
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