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Robert Riese
Dodge Dakota
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9/17/2010
03:23:00
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 Subject: 2000 3.9L squeaking/grinding noise
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I have a 2000 3.9l with 87,000 mi. that has started having a squeaking,which I first thought was a belt problem. The squeaking is now only occasional with an continual grinding sound added. Now I suspect a failing bearing...somewhere! I have not yet been able to pin-point where the problem is.
I've been reading past posts, and I realize that there are many culprits, so I plan to investigate some more tomorrow after what I read in the posts.
Any opinions of what would be the most likely problem location between the A/C unit, alternator, or fan clutch? (there are no water leaks, so I assume the water pump is O.K.)?
Let me know. I will update whatever I discover tomorrow...Thanks!
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Robert Riese
Dodge Dakota
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9/17/2010
04:53:43
|  RE: 2000 3.9L squeaking/grinding noise
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Squealing...the word is squealing (like a pig), NOT squeaking!
'duh-oh'!!
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daddio
Dodge Dakota
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9/17/2010
06:52:33
| RE: 2000 3.9L squeaking/grinding noise
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Could be either the idler pulley or belt tensioner pulley. With the engine off, remove the serpentine belt and start turning pulleys. They should turn easily with no noise and no wobbling.
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Robert Riese
Dodge Dakota
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9/24/2010
02:14:19
|  Mystery solved, on to the repair!
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Bought myself a Chilton manual a few days ago so I can be 'informed' for current and future repairs. Pulled the serpentine and quickly determined that the water pump is indeed going out. There is minimal coolant leak, too...I just had not yet noticed it. The idler and tensioner pulleys are both fine (thank you, daddio).
Now the plan to purchase the new/rebuilt unit so I can do the R+R next week. I plan to buy online rather than through Chrysler.
Suggestions please?
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daddio
Dodge Dakota
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9/24/2010
09:10:35
| RE: 2000 3.9L squeaking/grinding noise
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Make sure you change the tsat and the bypass hose while you're in there. It's cheap insurance.
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oldskooloutla
Dodge Dakota
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10/06/2010
20:16:13
| RE: 2000 3.9L squeaking/grinding noise
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I had the same problem with my 97 Dakota 3.9. it turned out it was the tensioner pulley bearing which is easily replaceable, just tale the pulley off and the bearing will tap out very easy, I don't remember if it had a circlip but the whole deal took 20 minutes at Oreily parts store for less than $15 bucks the pulley will set you back about $45-$50. Hope this helps
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Brian319
Dodge Dakota
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10/09/2010
14:09:02
| RE: 2000 3.9L squeaking/grinding noise
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I did my water pump at 109,000 miles exactly. It went out so fast jus broke and water everwhere. Got it home with out overheating but scared me. That truck means everthing to me. LOL baught her brand new.
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Vince
Dodge Dakota
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7/17/2011
13:53:07
| RE: 2000 3.9L squeaking/grinding noise
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I have this same sound and it turned out to be my
water pump. i replaced that and my thermostat and
the noise came back, but it stops when i turn on the
heat. when i turn off the heat the noise starts back
up. can anybody help me with this problem?
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Robert Riese
Dodge Dakota
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7/17/2011
15:47:56
| RE: 2000 3.9L squeaking/grinding noise
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Vince,
I occasionaly still get similar sounds also, but it is always after a rain (moisture in the air), and it always is only for a short time.
If your sounds are only occasional and short-lived (and there is no noticeable 'leakage'), then you are probably O.K.
If there is no leakage, but the sound(s) are constant, check out the other culprits (like the tensioner wheel and/or the idler).
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Vince
Dodge Dakota
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7/17/2011
15:54:09
| RE: 2000 3.9L squeaking/grinding noise
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I took off the belt and moved all the pulleys by
hand and found that the a/c compressor bearings are
shot. and now my engine cooling system works fine,
no leaks
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Vince
Dodge Dakota
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7/17/2011
15:55:12
| RE: 2000 3.9L squeaking/grinding noise
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Thanks for the help!
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