GolfGTIforum.co.uk
Model specific boards => Golf mk2 => Topic started by: Mew on 09 March 2010, 23:26
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I have a noise that's annoying me. It's only really apparent on the motorway when doing approx 60mph+. This probably isn't the best explanation, but it's quite a deep whirring noise: whir whir whir whir whir whir........ hopefully you get the idea
I have found the following (all at motorway speeds)
If i turn left the noise goes (even just changing lane)
If i come off the throttle the noise goes
If i dip the clutch or go into neutral and let the revs drop the noise goes
When under load the noise is more apparent (eg going up a hill)
If i dip the clutch or go into neutral and keep the revs between 3-4k the noise isn't as loud, but is still there
Any ideas as to what could be causing it?
edit: 16v kr, 9a gearbox
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It sounds like it could be a dodgy tyre, try swapping front to rears for a starter
Thom
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It sounds like it could be a dodgy tyre, try swapping front to rears for a starter
Thom
I had thought about that, but surely the noise would be constant and there regardless of engine load?
When i had a dodgy tyre on my first golf i thought a rear wheel bearing had gone. This doesn't sound like that though, the noise isn't continuous. :undecided:
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Jack the offending side up and I would check the bearing, disc/pads maybe the CV joint?
Hope you find it! :wink:
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quite possobly a wheel bareing
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The fact that it isn't there whilst rolling along at 70 in neutral made me think that its unlikely to be a wheel bearing. Also the noise isn't continuous like a wheel bearing
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Sounds clutch/g.box related to me.. Could also be an auxilary belt maybe..
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If i turn left the noise goes (even just changing lane)
If i come off the throttle the noise goes
If i dip the clutch or go into neutral and let the revs drop the noise goes
Wheel bearing
Exhaust
Clutch release bearing
:rolleyes:
Its probably a few separate issues, I find it hard to believe they are all related.
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wanna buy a skoda :grin:
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flocky knocky valve?
(I have no idea on the 9a 'box by the way, I assume that it has a normal style flywheel/clutch, rather than the arse about face the 020 uses?)
Sounds like a clutch release bearing, but it shouldn't be so noisey you can hear it at motorway speeds.
With the car at tick over parked up, depress the clutch pedal, see if any noise goes, if it does, then I suggest the bearing.
i agree with you on all the counts of if it's there when your rolling, but not when your foot is on the clutch/netural then it has to be transmission noise, poss diff bearings, as when they are not under load, they can grumble.
Cheers
kram
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Unfortunately the diff was one of my original suspicions, but i didn't want to put it up here incase someone just agreed. I wanted to see if someone said it without me saying it. I haven't looked into it any further though.
I also discovered yesterday that it doesn't do it in 4th gear, only 5th, so an oil change is probably a good idea, even if only to ensure the box has the correct amount in there.
As for the release bearing, there's no noise at all at idle.
The 9a is an 020 box btw, same ratios as the 2y except for a slightly taller 5th
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pray for no twinkley bits of metal in the oil then... Dunno if you are aware, but the 020 box evolved slightly over time, read somewhere that the box was orignally designed to be used level, but it leans back by 30' in the golf. The result is a lot of cars get run with too little oil in them, they should be filled to the bottom of the filler hole, then put the bung in, then take out the speedo drive and pour in a futher 500ml. I know you said yours is a 9A box, so this is probably irevelent, but maybe not.
Also whilst you're down there, grab a hold of your flange and give it a damn good wiggle, there should be very little play in the diff bearings, or...
Jack it up, both front wheels free, make sure it is as secure as possible, lots of axel stands, chocks etc, fire her up in 5th gear.
Gingerly get under the car with either a stehoscope or long screwdriver and have a listen to the diff bearings, then with a gloved hand, providing no LSD, slow 1 of the wheels to a stop (be very fu****g careful, that put extra load on the diff bearings and they should reveal their wear to you, then repeat on the other side)
Also the diffs are held together with rivots, which are renowned for being poo, bolts are muche better.
kraM
(bringing you happy thoughts of taking gearbox's out.)
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I also discovered yesterday that it doesn't do it in 4th gear, only 5th
That was a lie. It does do it in 4th.
I've had a thought, although i'm not sure it explains the lack of noise when not under load:
What's the verdict on a dodgy PS pump causing the noise?
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Try driving the car with the PAS belt taken off...
Did you try the car with the wheels swapped front to rear?
Thom
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Can't say i have. I'm struggling to see the logic though?
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Any uneven tyre wear, flat spots, damaged side walls, even the thrown out grease from a split CV boot, will at certain speeds set up a drumming noise that resonates through the car, as the front suspension has more linkages and joints etc, then the sound gets amplified,
swapping front to rear, will tell you straight away, whether its the tyres or not, rather than guessing at everything else..
Thom
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Well i'll give it a go on Wednesday, but i would have thought that if a tyre were to blame then the noise would be there regardless of the engine being at 3.5k or 1k at 70mph
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Your O/P describes perfectly the symptoms of uneven tyre wear, right down to the noise changing / disappearing under load, and coasting...
Thom
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Oh.
When i got my first gti i thought it had a dodgy wheel bearing, but that turned out to be the tyres (kwikfit own-brand, didn't even know they did them!). That was a constant drone though rather than more of an oscillating noise like this.
Anyway, i'll swap them over on wednesday and see what happens.
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At least you'll know either way....
Thom
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:shocked:
Guess what...............
Still there
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surprised you can hear it over the rattle from the engine :lipsrsealed: :grin: