Question about 2002 Dodge Caravan

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A high pitched whining noise in the engine.

I noticed this high pitched whining noise a few weeks ago. The mini van runs good. But the noise is a concern. When accelerating the whining pitch gets higher. I will be grateful for any help. Thanks!!

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  • Sue Warfle Jan 14, 2009

    Thanks for the answers guys! I'll check out all of these things. I appreciate your help!

  • Graciegrl Apr 10, 2009

    i have a 1999 Plymouth mini van , we have replaced belt 4 times alternator ,water pump,tentioner pulley and every thing thats related we put belt grease , soap on belt every 20 min. and it still does this horrible noise ! please any boby help me solve this problem , i can't get a new one yet.

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6 Answers

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  • Master
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This Noise Description sounds Indicative of the Sounds that come from the Serpentine Belt Or Related parts such as Belt Idler Pulley or Belt Tentioner witch also has a Pulley, but if Tensioner itself is Literally BROKE I've replaced a number like this it will cause a Whining noise . Best case scenario its just the Belt, and if any of the other Problems turn out to be the Culprit the Belt MUST be Replaced Anyhow as Damage is Being caused By the Very Whining you hear.
PLEASE Spend the Extras $ for the BEST BELT as this Drives your Water pump, Alternator, A/C Compressor, Power Steering Pump All Crucial to Control of, easy Steering ,All Electrical-Power Distribution, The COOLING of Engine << VERY CRITICAL Component
The Pulleys usually have a more Hum type Whining. So I would say at Best The BELT , And WORST Belt Tentioner is Broke

Posted on Jan 14, 2009

  • teresa Oct 30, 2011

    thanks i have a place to start !!!

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  • Dodge Master
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Some questions:
- Does it happen when standing if you raise the RPMs up to 2-3,000? If yes, listen closely to the alternator.
- Is it related to road speed?  If so, then you should put it on a chassis lift, wheels free, then cause it to happen by putting it in gear and raising RPMs to road speed.
I suspect it isn't the acceleration that causes the pitch to change but rather engine RPMs.
You could check this while on the road by starting in a lower gear and noting when the whine is very noticeable, then slip into the next higher gear to see if the whine changes or remains the same. If it remains, it probably isn't related to the engine but to some rotating part(s) outside it (for example, wheel bearings.) If it changes, then the noise is coming from some engine component and alternators can do this when the amperage load is high; it's also a part that turns at a fairly high speed and will 'whine' rather than 'growl.'        

Posted on Jan 14, 2009

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  • Contributor
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If the problem is in the am startup, and goes away in a few min`s then there is a revised P/S fill contaner to fix the problem from the dealer about 22 bucks. . If it makes noise most of the time, even after warm up . Then they make an idler & pulley and belt on the aftermarket , that has ribs on both sides of belt and on the idler. This will correct the noise problem and jumping belt problem. Hope this will help.

Posted on Feb 03, 2009

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Our 2007 caravan makes a whining noise. Someone told us to replace idler pulley, we did. Still made noise so we replaced the tensioner pulley. It still makes the noise, but oddly enough only when temp is lower than 65f. Any ideas?

Posted on Oct 04, 2016

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  • Contributor
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Belt tensioner pulley. Easiest fix youll ever have. Ignoring will leave you roadside and with a chewed up belt.that may need to be replaced too. Inspect it.

Posted on Nov 15, 2014

  • maqui4240 Nov 15, 2014

    you can sometimes.check it by relaxing the belt off, and playing with the pully...pulll on it....loose or wobbly? does it make the noise if yuilu give it a spin with finger?

  • maqui4240 Nov 15, 2014

    they eventually.come apart

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Same problem. Look up 2001 oldsmobile alero post of mine. What finally helped was getting all the pulleys cleaned and checked ( make sure they get cleaned) then I put brand new belt. It has been 3 days so far so good! Please try this as I had almost exact same problem as yours. Good luck

Posted on Mar 01, 2013

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Posted on Jan 02, 2017

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