Prado noise while moving but not under accelaration
Submitted: Thursday, Jul 05, 2007 at 22:35
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Boony
Hi All.
I have a 2000 GXL 3.4 Petrol Prado with 105,000 kms on the clock and it has recently developed an annoying noise that is hard to describe but close to an intermittent whiny squeel.
The noise is only detectable when the vehicle is traveling at 60km/h and not under acceleration. Easiest way to replicate is when accelerating up to the speed limit and then coasting once that speed is reached.
The appearance of the noise is completely random with the only time it has never occurred is first thing in the morning. It has even completely vanished for periods of up to 4 days but then returns.
To date I have greased all greasable joints in the drive train as this was my initial suspicion. Have also removed and replaced the 3 belts under the bonnet and checked that the noise wasnt coming from air con, power steering, alternator or the idle tensioner pulley for the air con.
As I havent yet reached the 150k service, the timing belt is yet to be replaced but I am curious to know if it could be one of the pulley bearings that tension that belt?
Any other Ideas on this problem as it is driving me nuts!!!
Thanks all in advance.
Reply By: Member - eerfree(QLD) - Thursday, Jul 05, 2007 at 23:22
Thursday, Jul 05, 2007 at 23:22
Boony
May be time check the rear diff !! known problem!
eerfree
AnswerID:
250992
Reply By: fisho64 - Thursday, Jul 05, 2007 at 23:41
Thursday, Jul 05, 2007 at 23:41
auto or manual?
AnswerID:
250998
Follow Up By: Boony - Friday, Jul 06, 2007 at 09:57
Friday, Jul 06, 2007 at 09:57
It's an Auto
FollowupID:
512177
Reply By: Member - extfilm (NSW) - Friday, Jul 06, 2007 at 01:13
Friday, Jul 06, 2007 at 01:13
Mate, check your oils in the box and diffs
AnswerID:
251007
Reply By: Wizard1 - Friday, Jul 06, 2007 at 08:35
Friday, Jul 06, 2007 at 08:35
Which part of the vehicle does it seem to be coming from?
The engine bay,
suspension, inside the car...it will help to narrow it down.
AnswerID:
251020
Follow Up By: Boony - Friday, Jul 06, 2007 at 10:11
Friday, Jul 06, 2007 at 10:11
Hi Wizard.
Thats the difficult part as it has been hard to pinpoint exactly where the noise is coming from.
It's definately not inside the car but is somewhere forward of the drive and passenger
Im 99% sure its engine bay and was even confident it was at the front of the motor hence the reason I checked belts pulleys etc. Even gave it a good dose of Inox around the pulleys, alternator and air con to try and see if that would help (I think this was also suggested in someone else's reply)
It also doesn't appear to be
suspension related but I wouldn't rule anything out at this stage
I have never had a vehicle with CV joints before this one so was also wondering if it could be CV related?
Thanks
Andrew
FollowupID:
512180
Follow Up By: Wizard1 - Friday, Jul 06, 2007 at 10:38
Friday, Jul 06, 2007 at 10:38
Although I have a TD, it may be a Toyota thing. Had a sweek from the front that was only apparent when the car was cold. Seemed to be something with the pulley and fan belt or in that vicinity. So sprayed heaps of silicon and it went away.
Toyota tried to tell me it was a loose intercooler, yeh sure.
FollowupID:
512186
Follow Up By: jeffwa - Friday, Jul 06, 2007 at 14:21
Friday, Jul 06, 2007 at 14:21
You'll prob find on the TD it's the air con idler pully bearing. I've pulled
mine out, cleaned and regreased it a few times to stop a similar noise, now I just spray it with ballistol. ;-P
Sorry can't help with the V6, but I doubt it would be CV's. They normally make a clicking/grinding noise.
FollowupID:
512212
Follow Up By: Wizard1 - Friday, Jul 06, 2007 at 14:40
Friday, Jul 06, 2007 at 14:40
JeffWA,
Thanks, I was beginning to think it was just my car and so did Toyota. What is Ballistol?
FollowupID:
512213
Follow Up By: jeffwa - Friday, Jul 06, 2007 at 14:46
Friday, Jul 06, 2007 at 14:46
It's a CRC, WD40 type thing but it's an organic one. Bloody stinks like bleep but it's the best god damn lubricant I've ever used. :-))
I use it on my electrical connectors, battery terminals, bloody everything and anything. (and not I'm not affiliated with it, I just reckon it's tops).
Whenever I say "Hey I just fixed the so and so" to my wife she says "let me guess, you sprayed ballistol on it" in a sarcastic tone. LOL
You can also use it on your fishing gear and it doesn't scare the fish away like CRC and that does.
You should be able to get it from Bunnings or most auto shops.
If you want to, it's pretty easy to take the pully off and pop the bearings out, soak em in degreaser or kero/turps and then re grease and pack. It'll stop it for longer than the spray will, but it's just a PITA. I just gave up in the end. Prob need a new one, but meh.
FollowupID:
512217
Follow Up By: jeffwa - Friday, Jul 06, 2007 at 14:48
Friday, Jul 06, 2007 at 14:48
Hmmm, I posted a link to it but it didn't appear.... I'll try again: Site Link
FollowupID:
512218
Reply By: Member - Bucky (VIC) - Friday, Jul 06, 2007 at 08:40
Friday, Jul 06, 2007 at 08:40
My Navara, had this bad squeel/grinding sound
Got a lot of crud in the back of the Alternator bearing, and the belt tensioner, from Floods at Dalhousie, in 2005. Got the Inox and sprayed heaps into them, probably just flushed the crud out.
Dunno if those bearings are sealed or not, but the noise has stopped, and not been back since.
Thanks to those thin " tubes " nozzle extensions, supplied, you can get into a lot of real tight
places
Wish you luck
Cheers
Bucky
AnswerID:
251022
Reply By: Aandy(WA) - Friday, Jul 06, 2007 at 21:37
Friday, Jul 06, 2007 at 21:37
Boony, for starters try to establish whether it is engine or running gear. Does it alter with engine speed or vehicle speed. My tip is that it's the front disc pads getting low. They have a metal attached to the pad and when the pad is getting thin it touches the disc and makes a n oise similar to what you describe.
AnswerID:
251137
Follow Up By: Aandy(WA) - Friday, Jul 06, 2007 at 21:41
Friday, Jul 06, 2007 at 21:41
metal strip attached not just metal. Application of the b rakes sometimes either alters or changes it but it's easy enough to check the pad thickness.
FollowupID:
512295
Follow Up By: Boony - Friday, Jul 06, 2007 at 22:52
Friday, Jul 06, 2007 at 22:52
Hi Aandy.
Its not the front brake pads this time.. I have been caught out by "that" noise before.
I think you have helped me though because it is definitely determined by vehicle speed and not engine speed so am thinking back to the running gear scenario now.
FollowupID:
512302
Follow Up By: Aandy(WA) - Friday, Jul 06, 2007 at 23:17
Friday, Jul 06, 2007 at 23:17
If you can find a suitable spot try coasting with the engine off and see if steering or braking have any effect on it. Good rule of thumb too is to look for the simplest things first. Good luck and do let us know if you get to the bottom of it.
FollowupID:
512304