68-carbine reoccurring trouble

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   I've had my 68 carbine now for about 10 years and it's never done me wrong, it's absolutely tough as nails.
I only play about once or twice a year, and until last year it was fine. The valve body o-rings turned to spaghetti, which seems normal to me seeing as how they were 8 years old. The only problem is that i keep replacing them, and the gun will work fine for 400 or so shots, and then they just blow out all over again. They are high quality o-rings that i am putting in.
This problem is really getting to me because i keep having to do field repairs or even worse take a rental gun to finish up my game 
Has anyone else seen this reoccurring problem with the 68 carbine? Would adding an expansion chamber help? I know that gun inside out but this problem is really stumping me.

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nastafarian Members Profile Send Private Message Find Members Posts Add to Buddy List Member Joined: 03 August 2008 Status: Offline Points: 1	Post Options Post Reply Quote nastafarian Report Post Thanks(0) Quote Reply Topic: 68-carbine reoccurring trouble Posted: 03 August 2008 at 9:54pm
	I've had my 68 carbine now for about 10 years and it's never done me wrong, it's absolutely tough as nails. I only play about once or twice a year, and until last year it was fine. The valve body o-rings turned to spaghetti, which seems normal to me seeing as how they were 8 years old. The only problem is that i keep replacing them, and the gun will work fine for 400 or so shots, and then they just blow out all over again. They are high quality o-rings that i am putting in. This problem is really getting to me because i keep having to do field repairs or even worse take a rental gun to finish up my game Has anyone else seen this reoccurring problem with the 68 carbine? Would adding an expansion chamber help? I know that gun inside out but this problem is really stumping me.

Enos Shenk Members Profile Send Private Message Find Members Posts Add to Buddy List Platinum Member ~-o@ Joined: 10 June 2002 Location: A comfy chair Status: Offline Points: 14109	Post Options Post Reply Quote Enos Shenk Report Post Thanks(0) Quote Reply Posted: 05 August 2008 at 6:08pm
	The body O-ring as the one thats around the outside rear of the valve? I would make sure that when you put the valve back into the reciever, the end cap threads arent damaging the o-ring. Thats the only thing I can think of really.