Ok i have been doing some reading up on this as im looking to tackle doing this in the next few weeks with a m8..
im going to strip the head down tho as i want to replace the water pump etc too
What i would like to know after reading a very helpfull how too that i found ( allbeit not on a vauxhall but still.. its interesting to read ) is on the astra is there 2 types of seal i should be buying?
i bought mine yesterday and they arrived today..
all 16 look like so: ( not actual image, mine are green inners not black )
But the how too im reading says they are only for the intake side of things.
the exhaust side is supposed to be:
acording to the how too, ( from a integra ) the black rings are the exhaust side and silver are intake side????
" A black spring around the valve stem seal means it goes on the exhaust side. A white or silver spring on the valve stem seal means that it goes on the intake side. They are not to be interchanged. The stem diameter on the intake side is bigger than the stem on the exhaust side and if you mix them up, your exhaust side will leak and your intake side will wear faster than normal. "
can anyone shed some light on this please?