Knocking noise when accelerate [Archive] - GrandAmGT.com Forum

PDA

View Full Version : Knocking noise when accelerate


theflash4740
10-26-2008, 11:45 AM
I have a Knocking noise in my car, and it gets worse everytime i accelerate. i think it could be something wrong with the valves idk...anything yall got is good.

zukiracer19
10-26-2008, 02:17 PM
knock on idle?

tenspeed
10-26-2008, 02:36 PM
Rod knock.

timberwoof
10-26-2008, 02:47 PM
Valve FAP!

gagt Mechanic
10-26-2008, 05:20 PM
dose it go away when the car warms up, thats from clearence with the pistons. if it doesnt you could have a loose rocker, bad lifter, or streched timing chain, (last is unlikely if stock)

theflash4740
10-26-2008, 06:20 PM
yea it knocks when at idle, just gets really bad when i accelerate. yea i took it to my friends dad is is a mechanic and said it was the back left valve that was causin the trouble he said. He wasnt sure but he said it was most likely the thing. How much would fixin that cost do you think if it was a bad rod lifter???