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Model specific boards => Golf mk2 => Topic started by: scottishpedro on 16 August 2012, 21:11

Title: Grinding/knocking when accelerating
Post by: scottishpedro on 16 August 2012, 21:11
Hi all

I have an 1990 8v GTI

Over the past few weeks I have noticed a bit of a knocking sound when I floor it/come on and off the throttle and sometimes when driving over bumps and potholes.  It is coming from near the passenger footwell and I initially thought it might be engine mounts going and causing the exhaust to knock however they were renewed only a few thousand miles ago.  I also wondered if it could be the gearbox mounts?  Tonight I floored it in 2nd and 3rd and in the high rev range there was a lot of knocking/grinding, not very loud but noticeable.

Any suggestions?

Thanks in advance

Pedro
Title: Re: Grinding/knocking when accelerating
Post by: Mr Blue on 17 August 2012, 01:15
Handbrake on, 1st gear, clutch up and does it knock?
Title: Re: Grinding/knocking when accelerating
Post by: scottishpedro on 17 August 2012, 08:54
Quote from: Mr Blue on 17 August 2012, 01:15
Handbrake on, 1st gear, clutch up and does it knock?

Hi mate

Tried this, brought the clutch to biting point and no knock.... It seems to happen more often when the car is accelerating and going over potholes etc.
Title: Re: Grinding/knocking when accelerating
Post by: Gambit on 17 August 2012, 11:35
check your droplinks & top mounts
Title: Re: Grinding/knocking when accelerating
Post by: scottishpedro on 17 August 2012, 13:37
Quote from: Gambit on 17 August 2012, 11:35
check your droplinks & top mounts

Will do cheers
Title: Re: Grinding/knocking when accelerating
Post by: JamesS on 17 August 2012, 16:43
Likely to be worn lower ball joint or wishbone bushes, they knock when you coast over bumps or under soft accelerating/braking. Tie rods are more of a popping sound with vague steering. Top mounts creak as well as knock.

Hope you get it sorted!
Title: Re: Grinding/knocking when accelerating
Post by: scottishpedro on 17 August 2012, 17:24
Quote from: JamesS on 17 August 2012, 16:43
Likely to be worn lower ball joint or wishbone bushes, they knock when you coast over bumps or under soft accelerating/braking. Tie rods are more of a popping sound with vague steering. Top mounts creak as well as knock.

Hope you get it sorted!

It seems only to happen when the car is accelerating, ie not when coasting and going over bumps/pot holes.  If I floor the accelerator on a bumpy surface it gets significantly worse which makes me think engine/gearbox mounts?

Thanks
Title: Re: Grinding/knocking when accelerating
Post by: weazgti on 17 August 2012, 20:04
What downpipe/manifold?
Is this the same noise you posted about a while ago?
Title: Re: Grinding/knocking when accelerating
Post by: scottishpedro on 25 August 2012, 01:48
Quote from: weazgti on 17 August 2012, 20:04
What downpipe/manifold?
Is this the same noise you posted about a while ago?

Just standard down pipe and manifold. Got exhaust hangers replaced and seems to be better.  The original sound I posted about is still present but very quiet, I had it looked over and there is nothing obvious just now.