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racer2
Novice

Jan 15, 2009, 4:08 PM

Post #1 of 3 (991 views)
missing Sign In

I have a 1993 gmc 3500 with a 5.7 it all at once started missing i pulled a compresion check and #3AND5 ONLY HAD 30PSI what would cause both cylendes to go down all at once thanks


way2old
Veteran / Moderator
way2old profile image

Jan 15, 2009, 4:27 PM

Post #2 of 3 (988 views)
Re: missing Sign In

If those are the only 2 cylinders that are that low, since they are side by side, it is possible the head gasket has blown.



Being way2old is why I need help from younger minds


racer2
Novice

Jan 15, 2009, 6:33 PM

Post #3 of 3 (983 views)
Re: missing Sign In

Thanks some one else told me it might be a burnt valve so eather way i will need to pull the head Frown






 
 
 






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