Join Date: Aug 1999
Location: Ontario, Canada
I would use the type that compresses the spring by turning a knob at the end rather then the pry bar type, You attach the compressor, wind it up, pull the keepers out, pull the spring off with the compressor, install new umbrella seal, reinstall the spring, install new valve seal on valve stem, install keepers, wind off the compressor.
Befor you go into a big job like this check the valve guides, with Rocker covers off, valbve closed, gently push valve spring in towards the motor, if you have a lot of movement more than 1/16 inch, seals are not going to help.
The valve seal on a GM motor is designed only to keep oil from running down the valve stem into the cylinder, It does not seal the valve stem.
Where in Ontario are you from?
Could you also describe your car.
Thanks Rob ( Port Hope - Butternut yellow 68)