Posted By Ed B

In the last week, I finally discovered the reason that my serpentine belt on my Taurus would squeal embarrassingly, even tough it was a relatively new belt.

I say relatively new, because it was a couple years old and had been replaced by a new belt with the head gaskets.

A week or more ago, I pulled both the old belt (a Gates) and the new (USA, brand illegible) alongside each other and found that the newer belt was longer than the older Gates belt.

I did this because when I tried to apply more tension on it, nothing tightened.

So I put the Gates back on (after cleaning it thoroughly) and it stopped squealing, for a few days.

Then it started again.

With the engine running, I put a wrench on the tensioner and put more tension on the belt.

(Note: I am an idiot. Kids don't try this at home.)

Putting more tension on the belt only caused it to squeal more!

Taking tension off quieted it and as it got quieter I observed that it ran "truer".

So I did what anyone would do.

I removed the tensioner, put it on a steel plate and measured the difference in height from the table of four positions (compass points) on the pulley.

So it was forty thousandths of an inch out of alignment!

I found that hard to believe, but I went out to get a Gates tensioner ($55!) and when I measured it, it had five thousandths.
So I installed it, and the squeal is gone.

Today, my air compressor threw a belt.

Of all things, the motor has twisted over the years to be out of line with the pump.

Nothing a torch and a hammer couldn't fix.
Cheaper than the car.

2 Comment(s):
Ed said...
It sure was the easy way.
January 28, 2012 09:48:46
Mark said...
Re: torch and a hammer Sometimes it's the only way.
January 27, 2012 08:37:22
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Ed B
Ypsilanti, MI


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