tapping noise after intake install
tapping noise after intake install Guys i have a tapping noise. Sounds like its towards the rear of the motor on the drivers side. I just recently installed a fast 102 intake and ls6 valley cover. When removing the stock intake i broke the opsu. After installing everything i heard a noise shortly after starting the engine, it increased with rpm. Pulled the intake...Found this:
I assume that is part of the inside of the opsu. i taped all the intake ports right after i pulled the intake so all i could guess is when the opsu broke all that **** fell in as i was pulling the intake.
I removed it. Put everything back together. Noise still there. Pulled the plugs on the drivers side. felt around with a magnet and didn't get anything. Pulled the valve covers, nothing looked suspect.
I Used a shop vac and turned the motor over a few times and it appears initially that the cylinders are still sealing. I could hear the vacuum go from intake to exhaust as i rotated the engine, and also i could tell when the valves were closed.
The tapping noise is still there but it does quiet up some when the engine warms up.
Any ideas whats going on?
Edit: damn i thought i was in the internal section
I assume that is part of the inside of the opsu. i taped all the intake ports right after i pulled the intake so all i could guess is when the opsu broke all that **** fell in as i was pulling the intake.
I removed it. Put everything back together. Noise still there. Pulled the plugs on the drivers side. felt around with a magnet and didn't get anything. Pulled the valve covers, nothing looked suspect.
I Used a shop vac and turned the motor over a few times and it appears initially that the cylinders are still sealing. I could hear the vacuum go from intake to exhaust as i rotated the engine, and also i could tell when the valves were closed.
The tapping noise is still there but it does quiet up some when the engine warms up.
Any ideas whats going on?
Edit: damn i thought i was in the internal section
Last edited by spy2520; Aug 24, 2012 at 09:07 AM.
Craziest thing just happened. I drove the car about 15 miles to log some data and get help diagnosing the noise. By the time I got there the noise had stopped. Drove another 10 miles and the noise randomly started up again as I was about to pull in a parking lot. Scratched my head for a little bit. Started the car back up and drove home. Within 5 minutes of driving the car it stopped again. I don't know what the hell is going on.
stupid question. you say the noise starts and stops. You sure one of your plug wires isn't loose? i know you found that piece inside your head but said once you took care of that the noise was still there. just something to think about
noise is gone. dont know what it what. did some work on the AC vacuum line because i was only getting defrost and lower vents working. haven't heard the noise since fixing that. never thought a vacuum leak could make a noise like that but i guess its possible.
