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i just got my 350 in my truck running and it sounds like a water pump going out but i changed it twice and even started it with it off i thought it might be the timing chain grinding on the timing chain cover but havent had time yet what do you all think all will help
thanks
grinding,should be something that is rotateing.AC,power steering pump,pulleys.
If it makes noise with no pump or other driven stuff on the front, it is likely the timing chain, all right.
If a noise is coming from the front, it could be the power steering pump, the AC, the alternator or water pump. By removing the belts, you will be able to isolate the problem.
If the noise continues after the belts are off, then it has to be part of the rotating assembly. If you have an oil baffle/deflector under the intake, maybe it is making contact with your push rods. If you have roller lifters, maybe one roller is seized. If you have a double roller timing chain, it may be making contact with the timing cover and or block, you are supposed to grind a little metal off of your block around the cam area where the chain meets the block.
If you installed the torque converter wrong, then it is pushing the crank forward, wearing off your thrust plate/bearing and the crank is making contact with the timing cover.
If you have a hollow flexible hose about two feet long, you should be able to hold one end to your ear and then move the other end around the front of the engine and in this way pin point the noise's origin.
You can use a piece of water hose or some like it to listen around the engine compartment.
i took all the belts off and noise is still there. when i freshend up the motor it had a double roller chain on it i put one back on it and a chrom timing chain cover i think that it must be the chain grinding on the cover thanks of the help
method that works even better than just a hose....... stick a screwdriver into a piece of hose with the end sticking out.... use the hose only end on your ear...
sorry, your cell phone was cutting out, this is all I heard. Is that what you want him to do?:LOL:Quote:
Originally Posted by thesals
the vibration damper!
It's one of those parts you seem to forget when building an engine.
I had one go bad and it only made noise under acceleration so it was hard to diagnose when standing still.
The hose trick worked.
A mechanics stethascope is only about 10 bucks!!Then they can tell people you have a doctor in the family...,...a car doc anyway!!:LOL:
yeah..... one of the guys in the shop has a laser mic he uses to find noises... works great.... but costs a lotta money