Engine squeal/whine
Thread Starter
Drifting
Joined: Jul 2007
Posts: 1,587
Likes: 90
Engine squeal/whine
I've got a 327/350 67. Recent rebuild but don't think many miles ago. I get a very soft whine when the engine gets fully heated, and then get a bit louder as the heat rises. Have soaped the fan belt and no chnage. No change as revs change. Fan clutch seems good as does water pump.
Any ideas.
Any ideas.
Race Director
Joined: Jan 2002
Posts: 15,359
Likes: 2,729
From: Close to DC
C2 of the Year Finalist - Modified 2020
Does it make the sound when driving or sitting at idle? Have you checked the bolts for the carb? Can you isolate the sound in a particular area of the engine compartment? 
Dennis
Dennis
Thread Starter
Drifting
Joined: Jul 2007
Posts: 1,587
Likes: 90
Only does it AFTER the car is up to operating temp. Then it does it when running or at idle. Sounds seems to come more from the front, All vaccuum lines seem good. Have not checked carb bolts or manifold bolts. Does not change pitch with revs. Remains failry constant, although louder after running awhile compared to when I first hear it .
Thread Starter
Drifting
Joined: Jul 2007
Posts: 1,587
Likes: 90
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
5 Best & 5 Worst Corvette Daily Drivers
Joe Kucinski
The Headlights of Every Corvette Generation Explained
Joe Kucinski
5 Best & 5 Most Overrated Corvette Track Packages of All Time!
Joe Kucinski
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
Team Owner
Joined: Mar 2003
Posts: 26,118
Likes: 1,874
From: Greenville, Indiana
Race Director
Joined: Jan 2003
Posts: 17,738
Likes: 3,722
From: Central Arkansas
Does sound like it might be the fan clutch but I would still pull the belt and try to run it briefly w/o it. You might have more than one problem - who knows?
I pulled a leaking radiator out of my GTX yesterday that had dumped about a half gallon of coolant on the garage floor. Decided to pull the water pump too since the pulley base needed to be pressed in a little to better line up the pulleys. Found out it was leaking also.
I pulled a leaking radiator out of my GTX yesterday that had dumped about a half gallon of coolant on the garage floor. Decided to pull the water pump too since the pulley base needed to be pressed in a little to better line up the pulleys. Found out it was leaking also.
Thread Starter
Drifting
Joined: Jul 2007
Posts: 1,587
Likes: 90
Thread Starter
Drifting
Joined: Jul 2007
Posts: 1,587
Likes: 90
Update:
Taken all the usefull suggestions and none have solved the problem.
I did then isolate the whine to the carb. I replaced the gasket (to the manifold). Didn't solve it either, but the gaskets (set) that were on there were for a 300hp not the 350. No decernable difference.
Now do I tear down the carb? What to look for? Or just replace everthing (rebuild) and hope?
Taken all the usefull suggestions and none have solved the problem.
I did then isolate the whine to the carb. I replaced the gasket (to the manifold). Didn't solve it either, but the gaskets (set) that were on there were for a 300hp not the 350. No decernable difference.
Now do I tear down the carb? What to look for? Or just replace everthing (rebuild) and hope?