[QUOTE]Originally posted by chopped 40:


"These can be installed without pulling the head if you have the tool to "air up" the cylinder to keep the valve from dropping."

hello,
as an aside to this oil topic,there is another low tech positive way of holding the valves up to replace stem seals -- rope.
the best is soft silver nylon.
with the piston on the up stroke with both valves closed,feed as much of the rope as you can in through the spark plug hole.,leaving a good "tail" outside. (obviously)
then continue to turn the engine as far as it will go before "locking" against the rope all bunched in the cylinder - and hard up against the valves.
then do your job on the seals,turn the engine back to release the rope and haul it on out.
repeat for as many cylinders as you have left.
it works a treat.

regards,Rod \:D