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Anyway to tell if a head has had a recent rebuild?
Posted: Tue Feb 14, 2012 1:33 pm
by Alex
ive got a spare b25 in the garage and the head is rather shiney and looks very clean, cleanest ive seen, although inside looks a bit dirty, anyway is there a way i can check if its had new parts such as valve seals, a head skim, new rockers etc
Re: Anyway to tell if a head has had a recent rebuild?
Posted: Tue Feb 14, 2012 2:25 pm
by toby
Do you know what age the lump is? does it have the later torx type head bolts or the earlier hex ones?
My 1988 325i touring, for example, has the earlier type so I know it's never had a head gasket replaced as it probably would have the later bolts installed as part of a new kit.
Re: Anyway to tell if a head has had a recent rebuild?
Posted: Tue Feb 14, 2012 2:28 pm
by Alex
toby wrote:Do you know what age the lump is? does it have the later torx type head bolts or the earlier hex ones?
My 1988 325i touring, for example, has the earlier type so I know it's never had a head gasket replaced as it probably would have the later bolts installed as part of a new kit.
The lump is 1989, will have to look at that, can you not buy the older bolts anywhere now like?
Re: Anyway to tell if a head has had a recent rebuild?
Posted: Tue Feb 14, 2012 2:37 pm
by toby
I'm not sure but I think they were a revised part by BMW at least.
Re: Anyway to tell if a head has had a recent rebuild?
Posted: Tue Feb 14, 2012 2:47 pm
by capri_rob
IIRC the heads have a marking on them to say where the limit you can skim down to is.
Alex PM sent