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MacGD016
20-07-04, 11:01 AM
I have a bit of smoke from one bank after a short spell at tickover, this only happens when the engine is warm and does not happen on overrun. I suspect that it is due to a valve stem seal, can these be replaced without taking the head off and if so how?

kdavies3
20-07-04, 11:31 AM
It is possible to do but you need specialist kit to do it.
You need an air line into the spark plug hole to pressurise the cylinder to hold the valves shut. The piston would be on it's TDC firing position.
You then need a tool to remove the valve springs / collets etc.
This will only work if the inlet and exhaust valves are well sealed in their seats. On an older engine they may not seal well enough to maintain the pressure.
If you have to make this kit you might as well remove the head. :(

Alaska Gray
21-07-04, 04:08 PM
Hi if your going to remove the heads its worth geting the valve giudes
machined to take uprated seals if this has not already been done.

The kit to do the seals without removeing the head is not expensive and is available
from sealy tools at most motor factors.

Good luck

jeff
22-07-04, 10:58 PM
Hi,

We never used any fancy kit to do this job on pinto engines, we would remove the plug with piston at the bottom then feed in a good length of soft 6mm rope like that used for skipping rope, then turn the engine over by hand untill the rope is pushed up tight to the valves holding them in place.

I do not know if it is possible on RV8 heads but can't see why not.

quick edit !!!!! make sure you leave a good length of rope hanging out so you can remove it

jeff