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#1 |
![]() Join Date: Nov 2016
Location: Southlake, TX
Posts: 588
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I'm getting a pronounced, rhythmic "chirp, chirp, chirp" upon first cold start and/or until the engine warms. In the winter, the noise is pretty regular and I got it yesterday (after a care full engine wash/detailing) and again this morning when started. The "chirp" increases with RPMs and will disappear after the engine warms.
I'm having a hard time isolating the noise (it clearly is coming from one of the rotating assemblies) but my gut says "belt tensioner." My serpentine belt has only about 4k miles on it, but I do have a used spare. Is there "best practise" way to find/prove a faulty belt tensioner (or other) and where the heck do you find a replacement if needed? These tensioners are impossible. I've seen where guys rebuild the tensioner? Thanks!
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Bill Schroeder Texas Proud! 1991 Corvette ZR1 #1388 2015 Challenger Scat Pack Shaker ![]() Last edited by billschroeder5842; 07-05-2020 at 12:06 PM. |
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#2 | |
![]() Join Date: Jun 2020
Location: Houston, TX
Posts: 183
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![]() Quote:
http://www.zr1specialist.com/HAT%20W...0tensioner.htm |
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#3 |
![]() Join Date: Nov 2016
Location: Southlake, TX
Posts: 588
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No presumption at at-- thanks for the lead! I may have to go that route.
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Bill Schroeder Texas Proud! 1991 Corvette ZR1 #1388 2015 Challenger Scat Pack Shaker ![]() |
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#4 |
![]() Join Date: Apr 2007
Location: Northern VA
Posts: 2,654
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With engine idling try relaxing the the belt tensioner to see what effect it has.
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Phil Wasinger 1994 Torch Red ZR-1 WAZOO Member George Braml Intake |
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#5 |
![]() Join Date: Nov 2016
Location: Southlake, TX
Posts: 588
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Will do, but I'll have to wait till tomorrow as I drove today and the chirp disappeared once warm.
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Bill Schroeder Texas Proud! 1991 Corvette ZR1 #1388 2015 Challenger Scat Pack Shaker ![]() |
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#6 |
![]() Join Date: Jun 2015
Location: Texas
Posts: 530
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I had a chirp like that that ended up being loose exhaust manifold bolts. Its a bit of work, but you could remove the belt when the car is cold and run it for a minute or so and see if it still chirps.
Last edited by 32valvesftw; 07-11-2020 at 01:39 PM. |
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