Having problems with your 1997 GMC Sierra ?

We've installed new head, intake and exhaust gaskets, yet there is 0 compression in either head. Think we have the rocker arm nuts cranked down to to tightly. How do we properly adjust these?

Posted / edited by AnonymousUser on : 19-02-2018

Answers :

Hello dysone...Is this a 5.7 litre engine?...Why were the heads replaced on this engine? Did it overheat and crack one..or blow a head gasket? Were BOTH heads replaced, or just one? How many miles does the engine have on it? Yes, you could have damaged some valve train componets if you over-tightened the rockers. Possible bent pushrods, collapsed lifters, or even bent a valve.
Did you check the engine block for warpage..was the deck straight and true?
Were the new heads properly torqued when installed? Did you reuse the old head bolts or replace them? Many factors to consider here...If you can tell me a little more i may be able to provide you with more answers.
Good luck...i hope this helps.
To properly adjust, refer to the vehicles maintenance manual.
Repair Help & Product Troubleshooting for 1997 GMC Sierra

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