valve guides

[mdapp]

what is recomended valve guide press fit in pan head .the service book says tight press.suunen book says min of .002.i am using bronze guides. any recomendation would be helpfull.
thanks
dapp

[koanes]

.002-.003 is fine in a round hole with no taper. I usually true up the hole with an adjustable ream as most are pretty nasty.

[mdapp]

koanes
thanks for reply.


dap

[koanes]

Dap, You are probably aware of this, but I thought I should add some info. You should put some lube, light oil or my preference, spray press fit lube, to the guide and head before chilling the guide and warming the head. This will help the guide find the path and prevent galling.