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View Full Version : how do you remove valve guides


xe Dan
27-05-09, 08:40 AM
as above how do you remove these from a c20xe head thanks:thumb:

also how are the fitted
bmw156
27-05-09, 08:41 AM
a long thin punch???
xe Dan
27-05-09, 08:44 AM
was trying that but they kept braking is there a proper tool for it
and martin have you got aw06 s number i want his 3 spokes
Will F
27-05-09, 08:54 AM
Head needs to be heated so that it expands and they are pressed in...

hammering with a punch??? lol
xe Dan
27-05-09, 09:02 AM
that sounds expensive where can i get that done ?
gaznovalet
27-05-09, 09:43 AM
as said the heads are heated up to around 200 degrees F and normaly a neumatic hammer is used to drive the valves out. to refit them it similar process the valves get heated up then cooled and driven back into place.
Will F
27-05-09, 11:19 AM
that sounds expensive where can i get that done ?

Only way to do it - unless you put it in your own oven. lol

Any machine shop/engine builder can do it -price will depend on how many need doing.
philip
27-05-09, 04:35 PM
seats will also want cutting too...and i doubt very much you will have a cutter. i tried buying a stone type cutter and i think that was £250 2nd hand.


i know my mate charges £6 supplied, fitted and seats cut. per guide
xe Dan
27-05-09, 04:39 PM
ive now dropped the head off to a machine shop to have new valve guides fitted and seats cut in
burgo
27-05-09, 04:56 PM
ive now dropped the head off to a machine shop to have new valve guides fitted and seats cut indeffinetly the best bet imo as altho it is possible to do it at home you'll never achieve the same as the pros with the right kit