changing head bolts and skiming on 325i

[marciane30]

Hi i have got to change my head on my 325i, if i get a second hand one will i need to have it skimed before puting it on the block. And do i need to buy new head bolts or can i use the old wons thanks marc.

[Supafly]

hi,
the recommendation on most engines is to use new bolts and at a minimum have the head skimmed.
why do you need to change the head and who's doing the work?

[surj]

ive re used old ones before but if there the hexagon type change em cuz they snap

[Brianmoooore]

Crack test, light skim and new bolts as a minimum. The bolts are stretch bolts, and don't return to their original length when removed.
Refacing of the valves, renewing of the exhaust valve guides, and re cutting and reseating of all the valve seats is also a good idea.

[marciane30]

[quote="Supafly"]hi,
the recommendation on most engines is to use new bolts and at a minimum have the head skimmed.


hi i am doing the work and i think the head is craked.

[Geoff]

Crack test, light skim and new bolts as a minimum. The bolts are stretch bolts, and don't return to their original length when removed.
Refacing of the valves, renewing of the exhaust valve guides, and re cutting and reseating of all the valve seats is also a good idea.

What about valve stem oil seals too?

[dano0]

buy a head set it will come with all the gaskets seals ect and a set of head bolts with new oil and filter this should cost no more than £100 its up to you how far you go though ie lapping the valves stem seals /valve guides