Random Squeel Sound?

[noely1]

hey guys just got a quick question..

im not too sure how to explain the noise but ill try my best...

when idling just below and a smidge about 1000rpm my car makes some sort of a noise and it sounds like sort of a diff whining (if anyone can picture that sound) or maybe the sound when u have brand new tyres on and ur cruising and u get that noise from ur wheels because they're brand new... i really dont know how to explain it..

it happens just idling as i said around 800rpm i slowly creep the revs up to about 1000rpm and it slowly fades away as i get higher and when the revs drop it comes back into action...

recent things done to the car: i have just got the car back today after having all new belts replaced including timing belt... wondering if it could be just a belt??? opened up the hood and it seems to be coming from the front of the engine exactly where the belts are but i thought i'd check on here as im not the brightest light bulb when it comes to engines..

hopefully someone can picture the sound its really hard to explain

cheers

[BASHO]

Just had my timing belt water pump etc et al done, had the same squeely moany problem , it could be one of your auxilary/accessory belts--(aircon, power steer, aternator.) not tensioned correctly or it could be your timing belt overtightened.

I had a Gates Racing belt fitted which are nortorious for howling thier tits of if they are overtightened, mine had to go back and have the timing belt re-adjusted as it started performing horribly after 250ks.

Did you have new idler bearings fitted ?- if you didn't these can develop noise very shortly after a new timing belt is fitted also.

[noely1]

ahhh as far as im aware i didnt hav new idler bearings fitted you wouldnt happen to kno how much they cost would you?

also i shouldnt be charged to get my belts re-tensioned or looked at again by the same mechanic that did it should i?

cause i dont really have the money after that to pay any more labour

but thanks mate you've put my mind at ease knowing that it is just one of them belts

[{Oo{34}oO}]

my 34 used 2 do that aye, is it coming from the front corner near where ur charcoal canister n air con thingi r, but on the motor block???

cuz i just lived with it wasnt loud tho

[AYW550]

i just recently got my timing belt replaced and the tensioner bearings too and right away i noticed the belt noise, although mine was not a "squealing" noise but much more of a "whirlling" noise, the two sounds being very different, the latter almost sounding like a super-charger, which i quite liked! and it was also in the same rev range you mention

now however ive driven the car a couple of thousand kms since the change and the whirlling noise is almost gone, mine too was fitted with a gates belt

i trusted the shop and the mechanic who worked on my car so i nvr took it back

perhaps the noise is more noticable on these rb motors cos i had another car fitted with a new gates belt (by the same mechanic) and i didnt hear any whirlling noise...although it was also a much smaller motor

[noely1]

hmm so what your saying is maybe do a few more k's in it and see if it sorta wears itself in??

and yeah i couldnt come up with the right word.. but u guys have come up with the word its this "whirling" sounddddddd

and 34 yes it seems to be coming from that region mate..

[{Oo{34}oO}]

lol i thought it was from the alternator or what eva tis down that side on my one

[hr32gts]

Whirring / howling (supercharger) sound is an over tightened timing belt

a squeel noise could be a tensioner or idler bearing on it's way out or an accesory belt not adjusted properly ...

I would be checking these things out as an over tight belt drastically reduces timing belt life ... and causes undue strain on the idler and tensioner bearings and also increases rotational friction

[sh@un]

may sound silly- but make sure none of the heat-sheilds are lightly touching the back of the brake rotors

[AYW550]

really it just depends on how loud it is, mine i could only hear mostly when i started it up inside my garage and the sound was trapped by the walls, but i never heard it while i was actually out driving the car and never got weird looks from ppl in town, lol.

but if you can hear yours while your in the cabin as you described it sounding like new tires then maybe it is too tight?

[BASHO]

ahhh as far as im aware i didnt hav new idler bearings fitted you wouldnt happen to kno how much they cost would you?

also i shouldnt be charged to get my belts re-tensioned or looked at again by the same mechanic that did it should i?

cause i dont really have the money after that to pay any more labour

but thanks mate you've put my mind at ease knowing that it is just one of them belts

The bearings are not to much money I think I payed about $100.00 maybe $120.00 for a pair of newby's,maybe put a post in "parts wanted" see what turns up.

I have no idea how much it would cost to fit, a couple of hours I'm guessin , if they are going to adjust the belts they'd be most of the way to fitting them anyway.

I took mine back to the workshop that fitted them in the first place and they readjusted everything and so far it's all good but mine didn't start noising up till it had done 250ks and I've only done 200 since they were readjusted.There was no charge.

They did however say that they that they didn't tighten the belt (Gates Racing Blue belt) as much as they normaly would with an OE one when they re-adjusted it.

Belts should not make noise if they do they are not adjusted properly.

One other cause of noise can be mis-aligned pulleys-(I phoned Gates for that one)

[Samon]

I had a full rebuild almost a year back and have had a noise like what you're describing since day one. The workshop who did the rebuild said it was just the gates belt needing to stretch, and that it'd go away after a few thousand kms... 10,000km later and it's still there and just as loud as ever... gonna take it back soon while it's still under warranty and get them to look at it... drives me mad!

[BASHO]

I had a full rebuild almost a year back and have had a noise like what you're describing since day one. The workshop who did the rebuild said it was just the gates belt needing to stretch, and that it'd go away after a few thousand kms... 10,000km later and it's still there and just as loud as ever... gonna take it back soon while it's still under warranty and get them to look at it... drives me mad!

I phoned Gates Technical --(03) 9797 9666 spoke to a very helpfull guy--Brian-- who told me the prime reasons for timing belt noise are--- not in any order---

Pulley alignment

Tension

Idler bearings

Also that Gates Belts dont stretch-------------atall.

We may therefore postulate that if a Gates racing belt is set to the same tension as an OE belt (which may have some slight give) and when the motor is fully warmed up and expansion takes place the Gates Racing belt will become overtensioned causing bearing stress and that whiring grating noises will ensue.

Or like that ?

[noely1]

Samon - yeah man it drives me crazy too!!!

Basho - cheers for the info on a rough price mate!

AYW550 - yeah it can be heard from outside and inside the cabin whilst out of the garage... i do get looks... just this arvo i had her idling out the front and a sales person for energex was walking up and down my streeet ended up stoping and asking if that was my car etc etc its nice bla bla bla.. then he's like i can hear that noise wat is it? im like oh i think its bla bla bla what u guys have said and he's like nahh i think its the carbie not getting enough fuel.. im like oh yeah nice carbie in my skyline aye and he jus wlaked off i was like HAAHAH FAIL!!

anyway im going to definatley get it taken back and just get the timing belt re-tensioned and the others looked at and see if that fixes it.. if not than i spose its my idler bearings?