Question about 1983 Chevrolet C3500

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New rebuild chatters

I just rebuilt my 83 4 bolt main new everything i fired it up it gets hot and the valves chatter i can get it to idle. i changed and went with a thicker oil no change. any help will be appreciated.

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1983 has hydraulic lifters. I wish this was simpler. There is a zero lash adjustment. Adjustment is possible at idle but it is best to use valve clips to keep the oil from squirting all over the place. After cranking the engine over by hand, where 1/4 turn after the Intake valve closes on each cylinder, adjust these two valves to zero lash. After adjusting all eight sets of valves during the hand cranking process, you should be able start the pickup with minimum amount of valve noise. With engine running Adj. each bank slowly, backing off each valve until there is some noise then slowly tighten 3/4 to 1 revolution. The hydraulic lifters should take care of the rest. Hopefully there will be no other noise.

Posted on Aug 09, 2008

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Adjust your valves your oil pickup tube needs to be adjusted you need feeler guages to adjust the valves down properly
make sure lifters and oil pick up tubes are not clogged

feeler guage is---> thin pieces of metal cut to different sizes to hold under valve adjusters till the play and chatter gone
check by book what the feeler size needed for adjustment

Posted on Jun 07, 2008


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