JHZR2
Staff member
This isnt a lot of info to go off of, but would my guess be the "common" issue???
98 Chevy S10 ZR2 4x4, 4.3L V6, owned since new.
Between 1000-2000 RPM, light loads, I get a metal on metal rattling sound at specific speeds only (resonances I guess).
At cold startup this does not happen, it gets worse as the vehicle warms up.
Kicking the tailpipe seems to give some of the same metallic character.
For 14 years old, the exhaust system looks like new. My thought is that it is rubber hangars that stretch and then soften as it gets warm. Is this sensible?
I do have a slight intermittent shudder of the engine when it is warm, but I think this is because it is a 90deg V6. It pulls strong, never any CEL, etc. I have tried looking for engine movement to see if a mount could be the culprit, but I never get any real motion of the engine.
But my #2 thought was that it could be a flaky mount that softens as it gets warm (I read that S10 mounts are terrible), causing something to move where it shouldnt at some speed.
Its just cold and wet, so going under to randomly look at stuff (especially since there has to be some load - spinning the engine to the same RPM in neutral doesnt make the noise), when the truck has to be powerbraked to get the noise to come up isnt my idea of a good time. Would rather have a good idea of the right suspects and track them specifically.
Thanks!
98 Chevy S10 ZR2 4x4, 4.3L V6, owned since new.
Between 1000-2000 RPM, light loads, I get a metal on metal rattling sound at specific speeds only (resonances I guess).
At cold startup this does not happen, it gets worse as the vehicle warms up.
Kicking the tailpipe seems to give some of the same metallic character.
For 14 years old, the exhaust system looks like new. My thought is that it is rubber hangars that stretch and then soften as it gets warm. Is this sensible?
I do have a slight intermittent shudder of the engine when it is warm, but I think this is because it is a 90deg V6. It pulls strong, never any CEL, etc. I have tried looking for engine movement to see if a mount could be the culprit, but I never get any real motion of the engine.
But my #2 thought was that it could be a flaky mount that softens as it gets warm (I read that S10 mounts are terrible), causing something to move where it shouldnt at some speed.
Its just cold and wet, so going under to randomly look at stuff (especially since there has to be some load - spinning the engine to the same RPM in neutral doesnt make the noise), when the truck has to be powerbraked to get the noise to come up isnt my idea of a good time. Would rather have a good idea of the right suspects and track them specifically.
Thanks!
