mattbta
Full Access Member
best to use a compressor to fill the cylinders to keep the valves from dropping, but you can also use rope, feed it in the plug hole then turn the engine over by hand till you feel it not turning. now the rope is pushing up on both valves and you can take the springs off.
I was using my dad's old farm air compressor to hold the valves up doing a spring job on my '99 Trans Am while swapping cams back in the day. Compressor failed (and spit oil everywhere) and valve dropped.