| |
Click on image for the lowdown. 
====
| | | Forums66 Topics128,026 Posts1,055,403 Members48,422 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Dec 2012 Posts: 163 'Bolter | | 'Bolter Joined: Dec 2012 Posts: 163 | Front of 235 still squealing. I tightened the belt, loosened the belt, put the old but good belt on. Nothing changes. Sometimes none, sometimes intermittant, sometimes constant.Could the speedi sleeve on the balancer be spinning? (doesn't look like it) Any bearings or bushings maybe? Sounds like a screech. Gets worse when revving. Very rythmic with engine rpm or constant. Only happens when engine is hot.
Any more ideas?
Thanks Howard | | | | | Joined: Mar 2010 Posts: 10,271 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,271 | Once it starts squealing again, shut it off and remove the belt. Run the engine just long enough to see if the squeal goes away. You can get away with revving it up a short while to see if the squealing goes away without over-heating the engine.
Carl
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
| | | | | Joined: Apr 2012 Posts: 135 Shop Shark | | Shop Shark Joined: Apr 2012 Posts: 135 | I once had a chirping noise that evolved to a rattling noise, wound up being a cracked generator pulley. You could not see it from the front side
| | | | | Joined: Oct 2012 Posts: 233 'Bolter | | 'Bolter Joined: Oct 2012 Posts: 233 | This maybe a long shot however one thing to check would be the tin cover over the front motor mount is contacting the front pulley. This can happen when the motor settles down and the rubber pushes up on the tin cover.Mtneermike
1953 Chevy 3100 261 and SM420 53Chevy 31001953 Mack Firetruck 1972 Porsche 911 1986 Honda Goldwing
| | | | | Joined: Sep 2010 Posts: 1,700 back yard wrench turner | | back yard wrench turner Joined: Sep 2010 Posts: 1,700 | My squeal was the water pump bearing. New water pump and no more noise.
I went through the same things you have, tighten the belt etc.
Wayne1938 1-Ton Farm TruckStovebolt Gallery Forums1989 Silverado 1996 Mustang GT convertible When I die, I hope she doesn't sell everything for what I told her I paid for it! | | | | | Joined: Jan 2000 Posts: 2,074 'Bolter | | 'Bolter Joined: Jan 2000 Posts: 2,074 | Yeah I'm with Wayne67, squirt a little WD or other spray lube behind Water pump pulley(engine running), if squeal goes away that's your prob.
Best of luck | | | | | Joined: Apr 2005 Posts: 2,832 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 2,832 | First thing I'd do would be to take the fan belt OFF. No noise then it is for sure the the belt, water pump, or generator. If noise is there with belt off then something with the dampner, timing cover, seal, is amiss. Try next size wider belt to see if pulleys are worn as belt must contact sides of groove, not the bottom. I wouldn't run a too wide belt but fine for testing.
Evan
| | | | | Joined: Dec 2012 Posts: 163 'Bolter | | 'Bolter Joined: Dec 2012 Posts: 163 | Lots of good ideas. The water pump is fairly new but still worth a try. I had the motor mount cover problem before and had to remake it smaller but I will recheck. Taking the belt off to check makes sense too.
Thanks for all your ideas.I will let you all know.
Howard | | |
|
|
| |
