A/C belt squeaking - tension problem?

[Tree Line]

3 liter Misubishi engine, "3" as it's identified
Plymouth Voyager Minivan, 1994.

The mechanic replaced the A/C even though it was
only 9 months old. That was somewhat curious.

Then he put the wrong belt on it so it squeaked a lot.

So the garage put yet another belt which made it much better.
But it squeak about once or twice each time I use it.
Just for a short second or less.

This is pretty good compared to before.

I noticed I can push the belt down about a thumb's length,
maybe 3/4 to 1"

What is the correct tension? 1/2" ??


Can I tighten this myself? I gather I would need a long
socket and extensions and some sort of rod to use
as a lever?

I can go back to the garage to ask them to tighten,
maybe next time they won't replace a belt that
really did not need to be replaced in the first
place.

Thoughts?

 

[BACKNCARDR]

Subject: A/C belt squeaking - tension problem?

From: [email protected] (Tree Line)
Date: 6/3/2004 7:15 PM Pacific Daylight Time
Message-id: <[email protected]>

3 liter Misubishi engine, "3" as it's identified
Plymouth Voyager Minivan, 1994.

The mechanic replaced the A/C even though it was
only 9 months old. That was somewhat curious.

Then he put the wrong belt on it so it squeaked a lot.

So the garage put yet another belt which made it much better.
But it squeak about once or twice each time I use it.
Just for a short second or less.

This is pretty good compared to before.

I noticed I can push the belt down about a thumb's length,
maybe 3/4 to 1"

What is the correct tension? 1/2" ??


Can I tighten this myself? I gather I would need a long
socket and extensions and some sort of rod to use
as a lever?

I can go back to the garage to ask them to tighten,
maybe next time they won't replace a belt that
really did not need to be replaced in the first
place.

Thoughts?

Got one just like u describe in the shop late tonight-each time the A/C
cycles=screech for a short bit. Looked at belt tension 1/2" deflection but it
appears glazed. Will put a Gates belt on it in the morning with 1/2" deflection
and test drive. I asked owner if anyone has filled/topped A/C freon (in case
some bonehead overcharged)-nope no one has touched the A/C. The is a 1997 model
and no noise from the compressor. Wheelc what happens in the AM.


Respectfully submitted,

Loren Knighton
Woodland, CA.

Under the hood since 1964
Member TRNI IATN
http://www.lubegard.com/automotive/trans_atf.html
http://www.longmfg.com/web/longwebframework.nsf/home/web.trucool

 

[Geoff]

So the garage put yet another belt which made it much better.

But it squeak about once or twice each time I use it.
Just for a short second or less.

I noticed I can push the belt down about a thumb's length,
maybe 3/4 to 1"

What is the correct tension? 1/2" ??

Find somebody who has a tool called a 'belt tension gauge' and knows how to
use it. (Example: http://tinyurl.com/33ufo) This 'measuring 3/4" or 1/2"'
with your thumb stuff is a Mickey Mouse approach -- there is a more precise
way to check the tension and make sure it is correct. Have them check the
new belt for glazing, I'm betting it already is glazed and needs to be
replaced. Have them also check the pulley alignment.

--Geoff

 

[Steve B.]

So the garage put yet another belt which made it much better.
But it squeak about once or twice each time I use it.
Just for a short second or less.

After is squeaks for a while the belt can get glazed and the squek
gets worse and worse. Make sure they are using a quality belt (not
the cheapest one the discount place has) and tightened properly.
Sounds like, as you suspected, this belt was a little loose. I would
have them tighten it and check for glazing.

Steve B.