spend $30 for a valve spring compressor, thread a piece of airhose into the sparkplug hole for the cylinder you want to work on , pressurize, then remove spring ,install new seal, reinstall spring, then move to next cylinder,
yes it needs to be on the compression stroke,
Glen, Glen Glen, what are we going to do with you?
in fact it has to be on TDC compression, if it's just on the compression "stroke" it will move!
(I know you know this I'm just giving you a hard time!
)
