Engine sounds sounds like a sander when cold?

jorgelrod

jorgelrod

Hooked
I've noticed that my engine is sounding like it's sanding or something along those lines when it's cold, after it warms up I no longer hear it, I don't think it has to do with the Temps as it's been 60-70s this week and I've still noticed it. I've wondered if it might be the belts but Its been a year and a half maybe since the serpentine belts were replaced because one broke.

Any ideas what this might be? I took some video to help you guys help figure it out.

https://youtu.be/yXu0tKfcVsA
 
jkrichard

jkrichard

New member
Are you low on power steering fluid? My idler pulley also made a higher pitch noise for a while after startup when the bearing was shot.

Get under the hood for a better idea of where it's coming from and go from there.

If it's coming from that area in the video I believe that's an AC pump. I'm not 100% on what sounds it makes if it's having trouble because I don't have AC.

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jorgelrod

jorgelrod

Hooked
Still trying to figure it out, I'll open it tomorrow morning and try record around to see if I can pinpoint or at least find a general direction.
 
Maineiac

Maineiac

New member
Take a really long screwdriver to your ear and carefully put it on the housings near all your components. If it's a bearing, you'll be able to pinpoint it.

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jorgelrod

jorgelrod

Hooked
Well, as I was driving from Orlando to Jacksonville the belt broke and left me without power steering or water pump. What the hell could be going on, this is the third time a belt breaks in the engine's lifetime and the first two were covered under warranty but something has to be wrong
 
WJCO

WJCO

Meme King
jorgelrod said:
Well, as I was driving from Orlando to Jacksonville the belt broke and left me without power steering or water pump. What the hell could be going on, this is the third time a belt breaks in the engine's lifetime and the first two were covered under warranty but something has to be wrong
Click to expand...

Spin the pullies and see if any are rough. Also grab them and rock them seeing if one is loose. You can also use a small vacuum hose as a stethoscope and touch it to each pulley while engine is running to see if one is abnormally loud.
 
jeeeep

jeeeep

Hooked
jorgelrod said:
Well, as I was driving from Orlando to Jacksonville the belt broke and left me without power steering or water pump. What the hell could be going on, this is the third time a belt breaks in the engine's lifetime and the first two were covered under warranty but something has to be wrong
Click to expand...

seems like a bad pulley, idler tensioner or the belts you replaced it with was a little too large.

On my 2010, I found out the idler pulley has a slight outward slope so if it got wet enough it would slip off. Belts aren't breaking, it's a result of it getting hung up on something else when if fell off and then breaking.

When buying the replacement belts, even though they were all tagged as the correct belt there was up to a 1/2" +/- difference in the actual length of the belts.

If you're not getting a Mopar belt, I suggest Continental Elite belts, they're quiet and their fit is better than Gates, Dayco and AC Delco I tried. I carry a spare with me now.

You could have a bad pulley or a pulley that's out of alignment from the others causing the belt to "walk".
 
jorgelrod

jorgelrod

Hooked
I was on the highway, roadside assistance took the jeep to a mechanic shop and I'm staying at the motel in front. I'll know more tomorrow
 
jorgelrod

jorgelrod

Hooked
Looks like an idler pulley locked up and the friction burned the belt. New Idler pulleys and a new belt and I was on the road again. On the plus side, the sander sound is gone :D
 
jknikos

jknikos

Member
Nice to have your jeep back again. In how many miles do you expect an idler pulley to go bad? Or it was a faulty pulley from the beginning? I am asking because i am afraid this happening to me when i am in the middle of nowhere!

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