belts screaching
Melting Slicks
Joined: Mar 2008
Posts: 2,666
Likes: 289
From: Spring Park MN
Either the belts are too loose, the belts are glazed, the pulleys are not aligned properly, or a combination there of. You could also have one of the accessories getting close to seizing up.
Burning Brakes
Joined: Aug 2008
Posts: 878
Likes: 55
From: Deep South Denmark
... or he removed the A/C belt and didn't add a the extra crank to waterpump belt
Thread Starter
Advanced
Joined: Apr 2011
Posts: 60
Likes: 0
i found a belt that was a bit loose, tightened it up a bit and it was great, had it over 3.5k today and was running like a dream. thanks for your help and advice
Drifting
Joined: Oct 2010
Posts: 1,873
Likes: 134
From: Bushkill Twp. PA
St. Jude Donor '17
Where do I get a "good" belt from?
Instructor
Joined: Jun 2010
Posts: 131
Likes: 0
From: Shreveport Louisiana
It would do you well to invest in a Goodyear Gatorback belt. I don't know if they make them for our cars(they should though), but they are one of the best belts you can get at local auto part stores.
Race Director
Joined: Sep 2001
Posts: 10,560
Likes: 439
From: Wellington, FL
St. Jude Donor '11 thru '25
I have the same problem on my car. Car was stored for 10 years, so I changed the belt and tires. I bought a cheap-o belt from autozone and it squeeled no matter how much I tighten it. Assuming it was a junk belt, I got another new one from Napa. This belt also squeels. Its a different squeel (more of a chirp) than the AZ belt. The Napa belt is tightened over halfway across the adjustment arc for the alternator.
Where do I get a "good" belt from?
Where do I get a "good" belt from?
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Pro
Joined: Jul 2008
Posts: 699
Likes: 3
From: Millersville, MD
Burning Brakes
Joined: Aug 2008
Posts: 878
Likes: 55
From: Deep South Denmark
If so it's probably not the alternator making the noise, it's the waterpump pulley because the radiator fan is attached to it.
You may need two belts between the crank and waterpump pulleys.
I don't know your belt configuration but mine had one belt "crank-waterpump-alternator" and one belt "crank-waterpump-A/C". When I removed the one going to the A/C I had to add one going from the crank to the waterpump.
Last edited by Danish Shark; Sep 7, 2011 at 06:09 AM.
Le Mans Master
Joined: Oct 2000
Posts: 8,897
Likes: 1,356
From: Santa Ana CA
I was getting belt screath regardless of how tight it was or how well it was lined up. I use a header mount and as the engine revs up, it snatches the belt physically bending the J-bar as it pulls forward and toward the centerline. This temporary loosens the belt in the process.
I had "stiffners" welded to the header bracket, changed the belt system out to a 1-1/2" Gilmer belt, use two J-bars with spacers/stiffners, and added a header brace. After all of that, I can still see some flex, but I've not heard the screaching.
I had "stiffners" welded to the header bracket, changed the belt system out to a 1-1/2" Gilmer belt, use two J-bars with spacers/stiffners, and added a header brace. After all of that, I can still see some flex, but I've not heard the screaching.
Pro
Joined: Jul 2008
Posts: 699
Likes: 3
From: Millersville, MD
Is it at high RPM only?
If so it's probably not the alternator making the noise, it's the waterpump pulley because the radiator fan is attached to it.
You may need two belts between the crank and waterpump pulleys.
I don't know your belt configuration but mine had one belt "crank-waterpump-alternator" and one belt "crank-waterpump-A/C". When I removed the one going to the A/C I had to add one going from the crank to the waterpump.
If so it's probably not the alternator making the noise, it's the waterpump pulley because the radiator fan is attached to it.
You may need two belts between the crank and waterpump pulleys.
I don't know your belt configuration but mine had one belt "crank-waterpump-alternator" and one belt "crank-waterpump-A/C". When I removed the one going to the A/C I had to add one going from the crank to the waterpump.
Burning Brakes
Joined: Aug 2008
Posts: 878
Likes: 55
From: Deep South Denmark
I don't have any number or link. I measured the approximate length and went to the local lawn mower repair shop and borrowed three belts with different lengths close to the measured length and went with the one that fits.
Le Mans Master
Joined: Oct 2000
Posts: 8,897
Likes: 1,356
From: Santa Ana CA
Mine used to do this before I put the Gilmer belt on.
I found that as the engine revs up from idle, it "snatches" the belt pulling the alternator forward and toward the centerline of the engine. This takes tension off the belt and you get the squeal.
Perhaps, your A/C belt was putting tension of the other side of the "system" to keep the alternator belt from "snatching" so its removal resulted in this problem.
What I did when I put on the Gilmer belt:
Double J-bar with solid spacers (fairly cheap and easy), and a brace from the back of the alternator to a header bolt.
Also strengthened the header bracket which was the primary source of the problem (which you may not use).
Last edited by toddalin; Sep 13, 2011 at 01:31 PM.
Burning Brakes
Joined: Oct 2003
Posts: 1,090
Likes: 74
From: New Carlisle IN
I have the same problem on my car. Car was stored for 10 years, so I changed the belt and tires. I bought a cheap-o belt from autozone and it squeeled no matter how much I tighten it. Assuming it was a junk belt, I got another new one from Napa. This belt also squeels. Its a different squeel (more of a chirp) than the AZ belt. The Napa belt is tightened over halfway across the adjustment arc for the alternator.
Where do I get a "good" belt from?
Where do I get a "good" belt from?
