if you don't have air compressor fitting, perhaps tdc would keep the valves from falling all the way out, while the spring is removed. I do not know if it will work though. in that case, rotate the engine until the pressure blows out the gp hole... that way the cylinder is fully at the top of it's travel.
John

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!