Mechanics

LOUD KNOCKING WHEN SLIGHTLY PRESSING GAS

1987 Datsun 510

Noises problem
1987 Datsun 510 6 cyl Two Wheel Drive Manual 150000 miles

I have a 1987 nissan truck that makes a loud knocking sound coming from the backside of the vaulve cover. When the gas is pressed harder the I dont hear the sound. Changed the vaulves and rocker arm assemblies and made sure gapping werer correct. Still have knocking sound. Please help!Thanks!
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KEALIIAUKAI
March 13, 2009.



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