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-   -   Angry elephant when initially accelerating on cold day (http://www.wranglerforum.com/f282/angry-elephant-when-initially-accelerating-on-cold-day-168462.html)

tj_scorpion 06-21-2012 06:44 PM

Angry elephant when initially accelerating on cold day
 
Hi guys and girls. Was wondering if someone could help me with a little mystery.
First up... bought my first wrangler about a couple months ago, so forgive the incompetencies you may find in this post....i havent got "the jeep thing" yet, so i "dont understand". :doh:

2001 jeep wrangler tj...stock as can be. No lift etc.
3 speed automatic shift.
Have changed a few things so far but nothing we would classify as mods.
Changed stock tyres to 30s....probably seems pathetic compared to your rides but as you probably know its about.the max i can go without rubbing at flex.

Its got the usual noise problems i read about on this forum. Eg. Squeaking dash, mild squealing from belt and rear wheels etc..... however a new sound has emerged quite recently. Now i have heard about angry sparrows, but this sounds like an angry elephant .

The noise happens when its cold (last week or so has been cold and.so its been happening consistently in the morning when going to work and evening coming back from work). When i move slowly (eg. Pull out of a parking space ) it doesnt happen. When i pull out onto the road and start to accelerate.....all of a sudden.....what sounds like an elephant blowing its trunk wildly. Its a grinding type of noise but not quite. The noise will continue for as long as i hold the acceleration/revs. After that first time it kinda stops. Im guessing something either warms up or loosens up during that time.

The only things i can think of that may have contributed are:
-loosened all the bolts to take off the grille...but i think messed up the thread on 2 of them under the passenger side fender.
-spray painted my rims black, masked the car and tires off, but like a n idiot forgot to mask off behind the rims (brakes etc).

Ive recorded the event. Sorry about the shocking camera work. I was trying to steer, shift, use my turn signals and record using my phone. T
Im initially pulling out of the parking space....waiting at the side of the road and then pulling out onto the road.
https://www.youtube.com/watch?v=uZRj...e_gdata_player

s14sh3r 06-21-2012 06:45 PM

The video is set to private.

tj_scorpion 06-21-2012 07:34 PM

yep sorry about that, youtube was setting it to private automatically.
I've fixed it now. But the forum doesn't seem to be able to play it....and the 'Continue to external link' doesn't seem to be clickable.

Right click...and click 'Copy video url' and paste in the browser. Thanks

SeVeReDiStOrTiOn 06-21-2012 08:39 PM

Man that doesn't sound good lol. I'd pull the belt and check all the accessories by hand for any seizing.

tj_scorpion 06-21-2012 09:13 PM

Yeah it's weird right?
I first thought that it might be a transmission thing (as it seems to occur around the same time it would change from 1st to 2nd...it's an automatic so not sure) and maybe it's low on trans oil/fluid hence it's grinding metal-on-metal when making the change....

...but it can't be that, because the changes don't feel rough or jerky.

Then I figured it might be due to (as it started around about the same time) my dumbass forgetfullness and not masking off behind the rims when spray painting. Perhaps there's paint clogging up between the brake pads and rotor? (damn I don't even know if i have disc brakes or drums...i should look at that)....... but I would assume that would only happen the first few days and then disappear after using the brakes a few times.

I'm scratching my head.
PS: my hand brake/emergency brake doesn't work either..... I don't suppose that could be malfunctioning and engaging when it's not supposed to? But that would probably make the wrangler fishtail all over the road....

SeVeReDiStOrTiOn 06-21-2012 11:28 PM

If you have drums in the rear pull the rotors and take a look...especially since your e-brake doesn't work. You could've broke a spring and have a pad dancing around in there or dragging...doubt it but you never know. Paint on the rotor surface wouldn't sound like that and you'd have braking distance issues.

tj_scorpion 06-22-2012 12:36 AM

Quote:

Originally Posted by SeVeReDiStOrTiOn (Post 2501168)
If you have drums in the rear pull the rotors and take a look...especially since your e-brake doesn't work. You could've broke a spring and have a pad dancing around in there or dragging...doubt it but you never know. Paint on the rotor surface wouldn't sound like that and you'd have braking distance issues.

Thank you, Hopefully I can check that tomorrow morning. Hopefully that's the issue. It's not so much even the annoying aspect of it.....but each time it happens I think to myself "Damn that is probably causing some damage somewhere"... so I'm a little hesitant to drive it.

ALASKA99TJ 06-22-2012 12:59 AM

sounds like a bearing to me, alternator, water pump or maybe just the muffler bearing.

s3nt3nc3d 06-22-2012 02:32 AM

I agree...I'd check bearings and stuff. Does it do it in neutral while stopped? That can rule out a few things...also, I believe you can run the engine without the serpentine belt (VERY VERY BRIEFLY)...might be able to do that for just a moment and see if it still does it. If it does, it's not a bearing on the alternator, water pump, power steering pump...

DrewG 06-22-2012 04:27 AM

Ok, I'll throw a couple guesses at it:
-Maybe it's the thermostat sticking partially open and causing some kind of weird liquidy reverberaty noise (those ARE the technical terms)
-Fan clutch. That would be my more probable guess that hasn't already been talked about.

Good luck hunting it down! I'd certainly be interested to hear what it turns out to be. Hopefully it's just one of your friends that put a whistle tip on your exhaust:

The whistles go.... whoo whoo! - YouTube

jonwanner 06-22-2012 06:10 AM

I to was thinking fan clutch. Next time it makes the noise, let off the gas and see what happens. My fan clutch is starting to make a similar noise when it comes on in hot weather.

tj_scorpion 06-22-2012 06:14 AM

hey guys thanks for the responses so far. S3nt3nc3d...On the way home tonight i put it in neutral couple of minutes after i started it....pressed the gas....and to my surprise.....YES it makes that noise!! It goes away then after the first time. So i guess atleast that means it not coming from the wheel area.

I'll have a look in the daylight...get someone to rev it while cold in neutral...and see if i can see anything strange under the hood.

Ps: one more thing i forgot to mention... when i was loosening the grille....i bent several of the fins in the AC condenser. I know the AC can make noises when something is wrong.....but surely it wouldnt be that loud or related to the revs?

ALASKA99TJ 06-23-2012 12:17 PM

once again its the throw out bearing. disconnect drivelines drop cross member, drop transmission and transfer case in one piece. (they are light, use rolling floor jack) pull out throw out bearing reinstall in reverse order. that is all (its just me, but id do the clutch and pressure plate while your in there, maybe even have the flywheel turned then dont worry about it for another 70,000 miles.

bdavid 06-23-2012 12:34 PM

Quote:

Originally Posted by ALASKA99TJ (Post 2506412)
once again its the throw out bearing. disconnect drivelines drop cross member, drop transmission and transfer case in one piece. (they are light, use rolling floor jack) pull out throw out bearing reinstall in reverse order. that is all (its just me, but id do the clutch and pressure plate while your in there, maybe even have the flywheel turned then dont worry about it for another 70,000 miles.



It is a 3 speed auto...................... no clutch :doh:............ check your alternator I would think it is going bad...spray some lube in the alternator and see if it quiets down

C.L. 06-23-2012 09:53 PM

Your steering wheel's on the wrong side. Every time you turn the Jeep off your computer forgets that, and is surprised to realize it again shortly after starting again.

Sounds like bad bearings on one of your pulley wheels. Do you have A/C? That's a common one to stick.

SeVeReDiStOrTiOn 06-24-2012 09:35 PM

Quote:

Originally Posted by ALASKA99TJ (Post 2506412)
once again its the throw out bearing. disconnect drivelines drop cross member, drop transmission and transfer case in one piece. (they are light, use rolling floor jack) pull out throw out bearing reinstall in reverse order. that is all (its just me, but id do the clutch and pressure plate while your in there, maybe even have the flywheel turned then dont worry about it for another 70,000 miles.

Dude how can you give advice on a sound when you didn't even hear it...1 sec into the vid shows it's an automatic.


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