Light grinding, RPM dependent
Thread Starter
Instructor
Joined: Jan 2022
Posts: 154
Likes: 99
From: Dallas
Light grinding, RPM dependent
Having some light grinding / scratchy sound from the engine bay. RPM dependent so I assume it is something on the serpentine belt. What is the usual suspect on these? New to LS world so sorry this is so basic. And yes, I did a forum search first.
Thread Starter
Instructor
Joined: Jan 2022
Posts: 154
Likes: 99
From: Dallas
Will investigate this weekend and report back. Working a ton this week. Just ordered an automotive stethoscope, will arrive on Friday
Last edited by DallasLoneStar; Mar 23, 2022 at 11:39 PM.
Melting Slicks
Joined: Dec 2004
Posts: 2,847
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From: Sleepy Hollow- NJ
The RPM dependent noise is when moving or stationary? If it's stationary that rules out wheel hubs. Then focus on pullys.
Harmonic balancer as mentioned above is a known failure point. The tensioner, water pump, alternator and AC compressor is also where I would look first.
Also mentioned above the belt is easy on and off (if your car is not FI). So isolating issue with belt off will help rule out pullys.
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