Need help with motor noise!
Jun 22, 2018 | 08:41 PM
#1
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Staging Lane
Joined: Aug 2017
Posts: 74
Likes: 21
Need help with motor noise!
The truck just got heads and a cam, it is a RCSB 4.8 with a 5 speed. Still waiting to get it tuned and I am having a hard time pin pointing the noise it is making because it is open headers. Curious if anyone has some suggestions as to what the noise might be or if I’m just loosing my mind.
Jun 22, 2018 | 09:25 PM
#4
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Staging Lane
Joined: Aug 2017
Posts: 74
Likes: 21
I am having a hard time trying to describe it, but if you separate the exhaust noise you can hear a hollow knock type noise. I hate to call it a knock because it does not sound all that serious but a I am still stumped. It’s a higher pitch then the low thump of the headers
Last edited by DrocheGMC; Jun 22, 2018 at 09:54 PM.
Jun 22, 2018 | 10:29 PM
#7
Staging Lane
Joined: Dec 2011
Posts: 65
Likes: 0
that hollow sound comes from the open headers itself, if you want to try and make sure its not a knock, cut a piece of water hose about three feet. put one side to your ear and the other end just guide it around the bottom of the engine. it allows you to hear any abnormal sound more distinctly. kinda a old mexican way that ive done it lol. it helps locating the sound.
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