Squeaking Noise coming from under the hood when started up - JeepForum.com

 
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post #1 of 12 Old 10-24-2004, 10:32 PM Thread Starter
Squall280
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Squeaking Noise coming from under the hood when started up

As soon as I start my jeep I get an extemely loud squeaking noise from under the hood that won't go away until I lay on the gas. How do I get rid of this noise?

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post #2 of 12 Old 10-24-2004, 10:41 PM
jeepin_coug
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It's a loose belt. Jeeps only have a serpentine belt, tighten it or replace it and the noise should go away.
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post #3 of 12 Old 10-25-2004, 07:06 AM
Why J?
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my 90 2.5l doesn't have a serpentine belt.
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post #4 of 12 Old 10-25-2004, 10:15 AM
jeverett
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My 87 4.2 does, but it seems to be Vbelts or serpentines with no reason or ascertainable pattern as to which year/model had which.
However I do agree it it is a loose belt, tighten and it should be fine. However before you tighten look for signs or wear or cracking, it may be stretched out enough that you need to replace. Also don't tighten it to much or you could ruin the bearings in your acc. that drive off of it.

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post #5 of 12 Old 10-25-2004, 10:19 AM
farmboy1976
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Three Words for you.

Permatex belt dressing!!
It's the bomb. And cheaper the replacing your belts.
Hope this helps, here is a link.

http://www.permatex.com/heavy_duty/E...&item_no=80073

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3.5 inch 4wd Suspension lift, 33 x12.5 BF's
Replaces items since purchase: Tires, Top, Radiator, Starter, Slave Cylinder(twice), Clutch Master Cylinder, Lots of hoses, Ring Gear, Clutch, Rebuilt Starter, Water Temp Gauge, MC2150 carb, nutter bypass, Electric choke, TFI Distributor, replaced power steering box, Smittybilt front seats
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post #6 of 12 Old 10-25-2004, 10:58 AM
JJorda
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From what I read, 91 and up models all had a serpentine belt, as well as the earlier California models. The 87-90 non-California models had V-belts. But yeah, it's either a belt problem or something's up with whatever the belt is turning. Take the belt off, try turning each pulley by hand, see if anything feels funky. If the belt looks cracked or glazed, replace the belt. See if the problem goes away.

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post #7 of 12 Old 10-25-2004, 12:45 PM
Robbins
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Cheaper than permatex belt dressing: A bar of soap. Seriously....with the engine running, carefully hold a bar of soap against the moving belt (if you loose a finger I didn't tell you to do that) on the side that contacts the pullies of course (or both sides on a serpentine) Bingo, no squeaky.

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post #8 of 12 Old 10-25-2004, 12:47 PM
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Quote:
Originally Posted by Robbins
Cheaper than permatex belt dressing: A bar of soap. Seriously....with the engine running, carefully hold a bar of soap against the moving belt (if you loose a finger I didn't tell you to do that) on the side that contacts the pullies of course (or both sides on a serpentine) Bingo, no squeaky.
that would be somewhat safe if you removed the fan and got your engine to idle at about..say 60RPM lol...other than that i wouldnt attempt it while running...

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post #9 of 12 Old 10-25-2004, 12:53 PM
Robbins
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I guess you could do it with the engine off if you just rubbed it down with the soap and then turned the engine over to expose the parts of the belt you couldn't reach... but the point is it really works. I've done it successfully with the engine running without losing any body parts, but not on a jeep...might be hard to reach in certain vehicles.

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post #10 of 12 Old 10-25-2004, 02:28 PM
AFjeep
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a cheap can of STP belt dressing worked on my jeep and nissan. no squeaks since I used a couple of months ago.

95 YJ, 2.5L, flowmaster exhaust, pretty much stock. Future upgrades; 2.5" RE lift, 31" tires, Posi-Lock, cheap winch. Anyone wishing to donate funds, please PM me!
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post #11 of 12 Old 10-25-2004, 04:15 PM Thread Starter
Squall280
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for some reason t only does it when its cold out. any difference?
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post #12 of 12 Old 10-25-2004, 04:28 PM
Robbins
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Don't think so...only difference would be the expansion/contraction of the belt due to temp that would make it slightly tighter when it's cold...probably just enough to make it squeak when a little bit either way would make it stop... or it slides easier on cold pullies maybe? Whatever is causing it, from your description it's absolutely the belt and any of the above remedies should help.

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