ok, when i took the cdr valve off and cleaned it yes after i cleaned it i was still able to blow thru it rather effortlessly so ill replace it, as for exhaust valve seals dosent that require removal of the heads?

 

nope. bring the pistion to TDC on the cyl u are working on. then get the adapter that threads into the glowplug hole and put some air into the cyl. this will hold up the valves.

with the pistion at TDC, there is only room for 7 peices of paper between the pistion and head.

 

I did it without the air. Still works, just nerve racking when the first valve drops an 1/8"