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1995 Chevrolet Cavalier Repair Question


Topics covered: Knocks, Noise, Piston.
Mileage: 103,565 miles.

Asked on May 9, 2011

Knock

The other day someone got my throttle stuck on my 95 cavalier.it was overrevved for about five minutes until they got it back and i got it unstuck.now there is a knock in the motor.it sounds as if it is coming from the top in the head.i popped the valve cover off andd the rocker arms are looking like they r ok when i ran it.any ideas
Avatar Asked by jpeace

Answer

Replied on May 9, 2011

Does it knock at idle or do you have to rev it to get it to knock?

Tiny Answered by saturntech9 (expert)
23,179 answers provided
Replied on May 9, 2011

it knocks at idle

Tiny Response from jpeace
14 questions asked
Replied on May 9, 2011

Try this let it idle and start by pulling one wire off see if the knock gets lower or goes away.Then put the wire back on and move to the next until you have done all four wire's.If the noise gets a lot lower or goes away you know it's in the lower end not the top end.

Tiny Answered by saturntech9 (expert)
23,179 answers provided

Replied on May 9, 2011

yeah it went away when i pulled the fourth plug

Tiny Response from jpeace
14 questions asked
Replied on May 10, 2011

Sounds like you have a knock in the lower end most likely a spun rod bearing.

Tiny Answered by saturntech9 (expert)
23,179 answers provided
Replied on May 10, 2011

could it be a valve that came unseated and slamming

Tiny Response from jpeace
14 questions asked

Replied on May 10, 2011

If it were a valve slamming wouldn't it still slam with the spark plug wire unhooked and the cylinder not firing?The piston is still going up and down and the valve would still be opening and closing.

Tiny Answered by saturntech9 (expert)
23,179 answers provided
Replied on May 10, 2011

true its junker then thank you

Tiny Response from jpeace
14 questions asked
Replied on May 10, 2011

Your welcome that's what were here for.

Tiny Answered by saturntech9 (expert)
23,179 answers provided