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the_bandit87
July 6th, 2006, 00:45
So just recently I finally replaced the serpantine belt that was on the Jeep when I got it with a new one. It squeels quite a bit, at first it was only a little then a lot, then a whole lot. I have noticed that the Pully that couples the water pump to the fan has the belt slipping off of it on the inboard side of the pully (the side towards the engine). It almost looks like the pully is at an angle and this is why it is slipping off. I have the power steering pump tightened up pretty good and the the belt has the proper deflection, only about 1/2" between the idler and the PS pump on the pump side IIRC. I was wondering if thus could be caused by a bad bearing on the water pump. The pump is currently not leaking.

philip_g
July 6th, 2006, 07:13
How does the crank pully look? Is it walking forward?

the_bandit87
July 6th, 2006, 11:48
truthfully I haven't really had a chance to look at the crank pully, but when I installed the belt it was fine. When we first started it up the belt had pronounced "whistle" that then got worse and turned into a squeeal. I can see that it is almost backing off the end of the waterpump/fan pully. I put a bit of WD on the belt just to quiet it down. The funny thing is that it used to squeal with the old belt but usually it would only squeal on cold days. At one point I roughed up the idler and some of the pullys with a bit of sand paper and that seemed to help too (they were all polished pretty good).

KarlVP
July 6th, 2006, 11:59
Is something starting to seize up. Like maybe your alternator?

cklaus
July 6th, 2006, 12:08
i don't know about the accuracy of your deflection test (I have heard of it and am not discrediting you) but it may just not be tight enough. My 2000 XJ squeeled right after i put on a fresh belt. I turned it off, tightened it more, ane the squeeling went away. I need to get a Krikit II to measure it accuratly but you may be in the same boat.

the_bandit87
July 6th, 2006, 15:00
yeah its funny you should mention that because I tightened up the Powersteering pump as much as I could, and the squeal still never went away. The belt will not stop squealing. I will try to see if I can get it any tighter.

lawsoncl
July 6th, 2006, 22:46
yeah its funny you should mention that because I tightened up the Powersteering pump as much as I could, and the squeal still never went away. The belt will not stop squealing. I will try to see if I can get it any tighter.

Don't go too tight, as that will just start killing the bearings. Check the crank pulley (aka harmonic damper) and make sure it's not seperating. Look for any of the rubber sticking out.

corbinafly
July 6th, 2006, 23:05
Which pulley are you talking about. On our xjs there is no pulley that couples the water pump to the fan. The water pump has a pulley on it, but that's it. The fan is on its own seperate pulley/bearing assembly.

Kyung

Dr. Dyno
July 7th, 2006, 04:31
If the water pump shaft is worn, the pulley will wobble and throw off the belt. The water pump will only start leaking from the weep hole when the shaft seal breaks. Seems to me that you're gonna need a new water pump.

Saudade
July 7th, 2006, 09:37
Squealing could come from any of the pulleys. Do you have A/C? Does it get worse when you turn it on?

Make sure the belt is centered over the grooved pulleys correctly.

http://img428.imageshack.us/img428/3946/serpbelt4et.th.jpg (http://img428.imageshack.us/my.php?image=serpbelt4et.jpg)

the_bandit87
July 7th, 2006, 17:49
Dr. Dyno I am thinking you are probably right, the belt is coming off of the water pump (improper alignment as shown above) but the belt has not been thrown off, its just about the last 1/4-1/3 is coming off the inboard end of the pully. When we realign the belt onto that pully for the water pump it hops off the back and starts squealing again. The only thing I find odd is that the old one wasn't squaling (it would when cold but this is CONSTANT). Currently there is no leakage from the waterpump but I suspect that the bearing is probably bad and the old belt was just stretched and warn so it was not squealing. I am just worried that I am killing my Serpantine belt, and by the way, no I just have an idler, no AC.

EDIT: By the way the harmonic balencer is fine from what I can see, doesn't look to be sepperating

the_bandit87
July 7th, 2006, 20:06
I'm sorry, but I'm stupid and it was dark. Its not the waterpump pully that it is working its way off of, it is the pully for the FAN. I have to check it again since I adjusted the belt a bit (loosened it off, lined it up with the pullys, and tightened it back on. I will let u guys know what happenes.

Dr. Dyno
July 8th, 2006, 07:01
Remove the belt altogether and check each pulley one by one for wobbles or squeaks. Then you'll know which is the culprit. What you're doing now is like pissing into the wind and you won't find the problem that way.

langer1
July 8th, 2006, 07:07
The old belt was glazed and hard is why it did not squeal.

92westshady
July 15th, 2006, 09:27
Hi, I don't want to hijack your thread but I am having a similar squealing, except mine only squeals when I first start the Jeep and turn on the A/C. It is horribly loud and as I press on the accelerator it gets louder. If I turn off the A/C it goes away and once the Jeep warms up it goes away as well. What do you think is causing my squeak? Do you think it could be the idle squealing as the A/C compressor kicks on and puts more tension on the idler because it seems like the squeal is coming more from the driver side not A/C or passenger side of the engine compartment.

langer1
July 15th, 2006, 09:31
93westshady loose belt.

Dr. Dyno
July 15th, 2006, 09:57
Hi, I don't want to hijack your thread but I am having a similar squealing, except mine only squeals when I first start the Jeep and turn on the A/C. It is horribly loud and as I press on the accelerator it gets louder. If I turn off the A/C it goes away and once the Jeep warms up it goes away as well. What do you think is causing my squeak? Do you think it could be the idle squealing as the A/C compressor kicks on and puts more tension on the idler because it seems like the squeal is coming more from the driver side not A/C or passenger side of the engine compartment.

In your case the belt's probably not tight enough so when you add extra load to it by switching on the A/C, it slips on the water pump and idler pulleys because they don't have grooves.
To find out if that's the case, there's two things you can do to check the belt tension. Firstly, check the deflection along its longest free length (usually idler pulley to PS pump). It should be not more than 1/2". Secondly, grab the belt in the same place and see how much you can twist it. It should go no more than 90 degrees if it's tight enough.

lawsoncl
July 15th, 2006, 10:07
Hi, I don't want to hijack your thread but I am having a similar squealing, except mine only squeals when I first start the Jeep and turn on the A/C. It is horribly loud and as I press on the accelerator it gets louder. If I turn off the A/C it goes away and once the Jeep warms up it goes away as well. What do you think is causing my squeak? Do you think it could be the idle squealing as the A/C compressor kicks on and puts more tension on the idler because it seems like the squeal is coming more from the driver side not A/C or passenger side of the engine compartment.

Which hijacked thread should we respond to?
http://www.naxja.org/forum/showthread.php?t=27233
http://www.naxja.org/forum/showthread.php?t=79361
or http://www.naxja.org/forum/showthread.php?t=90350 ?

And yeah it's probably just a loose belt.