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Old 09-14-2013, 11:24 AM   #1
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Can someone identify this noise?

2000 Jeep TJ engine whistling - YouTube

I'm thinking it might be my water pump. I just wanted to ask here real quick before i start dismantling my front end. Anyone run into this noise before?

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Old 09-14-2013, 05:19 PM   #2
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Are you leaking anything? Could be belt or pulley throw some wd40 on it first to see if

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Old 09-14-2013, 05:21 PM   #3
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That sounds like either the idler pulley or water pump.
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Old 09-14-2013, 05:28 PM   #4
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My guess would be the idler pulley.
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Old 09-14-2013, 05:36 PM   #5
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Pulley!
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Old 09-14-2013, 06:11 PM   #6
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Yep that's what I was going with pulleys are the things your belt is attached to.
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Old 09-14-2013, 09:24 PM   #7
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Thanks guys! No I'm not leaking anything that I can see. I'll spray some WD-40 on my idler pulley tomorrow and see if that helps. I noticed today that it's very intermittent and it quiets down when I accelerate. Drove my jeep about 40 miles today and it only happened once for about 10 minutes.
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Old 09-14-2013, 10:13 PM   #8
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Take the belt off and spin the idler/tensioner pulley and accessories by hand.
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Old 09-17-2013, 11:05 AM   #9
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-bump-
Can someone tell me exactly which pulley is the idler? I can't turn anything up online, and when i got the part from Advanced Auto, the pulley they gave me isn't comparable to any of the tension pulleys on my engine in terms of size. If you don't have an AC unit, does a bracket and separate pulley take it's place? If so, that might be what they sold me. As i do have an AC unit.
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Old 09-17-2013, 11:21 AM   #10
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Its directly under the power steering pump.
15mm bolt to loosen/remove and another 15mm bolt for adjusting

There is another pulley to the left of the thermostat housing (you see it in your vid), I believe part wise its the same pulley and sometimes it gets squeaky as well.

if you need a pic i can run outside real quick and get you one.

*edit* can anyone confirm, it doesn't look the same as mine in the vid, did that get moved in '00?
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Old 09-17-2013, 03:03 PM   #11
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get a stethoscope with a stick probe and touch to center bolt on any suspect pulley and listen to id source

harbor freight sells a cheep one

No disasembly required but if you are careless around spinning belts and pulleys you can injure or kill yourself
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Old 09-17-2013, 03:10 PM   #12
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PS WD40 should be banned from any shop except as a solvent or as a cutting fluid when machining aluminum

It was never designed to be a lubricant and will gum up anything you spray it on not to mention dissolving any any decent lubricant that was already there.

You can also use the aerosol can as a flame thrower for wasp nests
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Old 09-17-2013, 03:24 PM   #13
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Quote:
Originally Posted by Digger84 View Post
PS WD40 should be banned from any shop except as a solvent or as a cutting fluid when machining aluminum

It was never designed to be a lubricant and will gum up anything you spray it on not to mention dissolving any any decent lubricant that was already there.

You can also use the aerosol can as a flame thrower for wasp nests
PBLaster is amazing but like WD40 its not a permanent lubricant, just penetrating oil and cleaner. Always use an actual lubricant and to prevent belt breakdown use some belt conditioner.

**Im totally going to try that on the wasp nest by my house tonight
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Old 09-17-2013, 07:13 PM   #14
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If you are careful, you can take a 4' piece of heater hose or garden hose and put one end to your ear and pinpoint for the source of the noise with the other end.

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