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Old 10-30-2013, 03:33 PM   #1
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Idler Pulley

I have a 2000 TJ 4.0 w/o AC

I am 99% sure the idler pulley is what is causing my squeaking and whining in this colder weather. The noise seems to go away when the Jeep warms up, but with the hood up, it's still there, just greatly reduced.

My question is do I have to remove the serpentine belt to install the pulley or can I can install it without doing that?

I have the FSM but there is nothing in there that covers this or even the tension pulley. Any help is greatly appreciated. Thanks.

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Old 10-30-2013, 03:46 PM   #2
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Yes, remove the serpentine belt. A ratchet will fit in the hole and just turn it and the belt will loosen. No other way of changing the idler pulley.

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Old 10-30-2013, 05:14 PM   #3
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There is a square hole on the idler pulley bracket that a 3/8 ratchet will fit in.

The bracket is spring loaded.

Just put the ratchet in the hole and take the tension off of the serpentine belt enough to be able to remove it.

Then remove and replace the idler pulley.
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Old 11-03-2013, 04:37 PM   #4
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Thanks for the help. Another quick question. I have a new pulley coming tomorrow and my serpentine belt is 2 years old, but looks to be in perfect condition and only about 15k miles on it. Do you think it would be a good idea to change the belt now and save the old one for just in case. I was also thinking about trying a Goodyear V belt. Anyone have any experience with this as to how well they hold up?
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Old 11-03-2013, 05:06 PM   #5
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Quote:
Originally Posted by harley jones View Post
There is a square hole on the idler pulley bracket that a 3/8 ratchet will fit in.

The bracket is spring loaded.
Some are like this, and some aren't. My "99" 4.0L has a tensioner bolt on the power steering bracket, I'm not sure what year they went to the spring loaded idler pulley.
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Old 11-03-2013, 06:28 PM   #6
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My 2000 TJ Sport has a tension pulley.

Quote:
Originally Posted by Water Dog View Post
Some are like this, and some aren't. My "99" 4.0L has a tensioner bolt on the power steering bracket, I'm not sure what year they went to the spring loaded idler pulley.
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Old 11-03-2013, 06:39 PM   #7
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Quote:
Originally Posted by GGA1759 View Post
Thanks for the help. Another quick question. I have a new pulley coming tomorrow and my serpentine belt is 2 years old, but looks to be in perfect condition and only about 15k miles on it. Do you think it would be a good idea to change the belt now and save the old one for just in case. I was also thinking about trying a Goodyear V belt. Anyone have any experience with this as to how well they hold up?
At only 2 years and 15000 miles I'd say save your Money !

BTW a Goodyear V-Belt doesn't work in place of Serpentine Belt. Maybe you mean a Goodyear Gator.
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Old 11-03-2013, 06:55 PM   #8
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My first choice is Gates. Good quality belt!
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Old 11-03-2013, 07:28 PM   #9
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Originally Posted by GGA1759 View Post
My 2000 TJ Sport has a tension pulley.
Then just release the Tension, move belt out of the way, replace Idler and reassemble in reverse, including adjusting the Tension.
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Old 11-03-2013, 09:03 PM   #10
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Sorry. Yes, Goodyear Gator.

Quote:
Originally Posted by CoyoteOn2 View Post
At only 2 years and 15000 miles I'd say save your Money !

BTW a Goodyear V-Belt doesn't work in place of Serpentine Belt. Maybe you mean a Goodyear Gator.

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