RPM and Load Dependent Screech/Whine Noise

Zbestest · 02-09-2021, 12:04 PM

I'll check the belt that was something I only did a visual and it seems tight but I'll try the deodorant trick and see if it helps then I'll tighten if needed. Thanks!

And more info for the other person, it will only happen while moving, downhill will not make noise but uphill will make it more prominent than flat. Uphill will also make the noise consistent if I hold the RPM which doesn't happen on flat.
Thanks y'all!

Dreadnaught · 02-13-2021, 07:55 PM

Try revving up your engine in neutral to see if the noise is present. If so, you can rule out the trans, diff and any other moving part. To me, it sounds like it you may have an exhaust leak. If you can have a friend help listen and try to pin point where the sound is with the hood up. Check to see you if you can see soot around the exhaust manifolds. You could have a stud that broke on one of the exhaust manifolds or any part of exhaust.

Also, put your car in gear and power brake it and see if the noise presents itself.

02-13-2021, 07:55 PM	#2 (permalink)
Dreadnaught Track Member Join Date: Dec 2009 Location: Farmington, Utah Posts: 582 Drives: 14 SR 370z 6MT Rep Power: 10141	Try revving up your engine in neutral to see if the noise is present. If so, you can rule out the trans, diff and any other moving part. To me, it sounds like it you may have an exhaust leak. If you can have a friend help listen and try to pin point where the sound is with the hood up. Check to see you if you can see soot around the exhaust manifolds. You could have a stud that broke on one of the exhaust manifolds or any part of exhaust. Also, put your car in gear and power brake it and see if the noise presents itself. __________________ Ford Diesel and Heavy Line Technician at your service. Last edited by Dreadnaught; 02-13-2021 at 07:58 PM.

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02-09-2021, 12:04 PM	#1 (permalink)
Zbestest Base Member Join Date: Jul 2020 Location: San Jose, CA Posts: 2 Drives: '13 370z Nismo Rep Power: 6	I'll check the belt that was something I only did a visual and it seems tight but I'll try the deodorant trick and see if it helps then I'll tighten if needed. Thanks! And more info for the other person, it will only happen while moving, downhill will not make noise but uphill will make it more prominent than flat. Uphill will also make the noise consistent if I hold the RPM which doesn't happen on flat. Thanks y'all!