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09-09-2016, 09:24 AM | #1 |
Junior Member
Join Date: Sep 2016
Location: San Antonio, Texas
Posts: 5
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Squealing fan belt driving me CRAZY
Three weeks ago, my brother became the proud owner of a 1930 Model A for the first time. So everything on this old car is new to us.
It's a beautiful car, but we have a problem: fan belt squeal. In fact, the problem is so bad that he asked me for help. The mystery began when we tried a new belt. The noise stopped, but the alternator stopped charging, too. In fact, it started discharging! After 4 days of fiddling, we found that: 1) A new 1/2" belt stopped the noise, but the alternator no longer charged. 2) A new 5/8" belt charged the alternator, but the squealing was unbearable. If we thought the noise was bad at idle, when we turned on the lights and the a/c, the noise became 100 times worse. We have tried everything: 1) New belts 2) New alternators 3) Soap 4) WD-40 5) Dressing 6) Circuit tracing Now we are considering a mismatch of pulleys. Is that even a thing? The crankshaft pulley looks like it was made for a 1/2" fan belt. The alternator pulley looks like it was made for a wider belt, such as 5/8". We even made a clay/putty cast of the two pulleys to see if we could find a difference. We did. You can see it on this YouTube video: https://www.youtube.com/watch?v=wlhYWdAN0Ak We will appreciate any and all help about what to do next. We're running out of ideas. |
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