displaying posts 1 to 16 of 16

Author Subject: 1 clunk when accelerating, and 1 when braking
jammapic

Senior User

Location: Manchester

Registered: 11 Jun 2010

Posts: 778

Status: Offline

Post #1
Hi all,

I've fitted my A048R semi slicks back on today, and with all the extra grip they give, I've run into a bit of an irritating issue, that said, I did have it once or twice on the other wheels.

If I launch pretty hard, I get a clunk from underneath my feet - 1 knock.. that's it. If I then brake really hard, I get 1 knock. If I set of gently, no knock. It's like something is moving forwards and backwards.

Also, if I launch hard, I get a knock, then brake gently with no knock and launch hard again I still have no knock.

I have vibratechnics pbushes, and powerflex front bushes in the wishbones along with nearly new top mounts, vibratechnics engine mounts and a welded up (and substantially stronger!) top engine mount along with brand new track rod ends and rose jointed drop links.

I'll get underneath and have a poke about tomorrow, but what do you reckon? A balljoint starting to go?

JP

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Posted 6th Mar 2013 at 18:33
swiftyboi006

Seasoned Pro

Location: Maidenhead

Registered: 12 Apr 2010

Posts: 2,110

Status: Offline

Post #2
Check the top mount for movement i had this on my p1

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Posted 6th Mar 2013 at 18:56
rikky 🦔

Location: cheshire

Registered: 28 Feb 2004

Posts: 26,791

Status: Offline

Post #3
my track car was like that, was nearside balljoint. thought it was wheelbearing at first. could also jam a chock behind the engine mounting and wedge inbetween the cradle, see if it's moving a bit, but i doubt it's that

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Posted 6th Mar 2013 at 19:06
jammapic

Senior User

Location: Manchester

Registered: 11 Jun 2010

Posts: 778

Status: Offline

Post #4
I have had the top mounts loose before, but yes checked that and not the problem.

JP

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306 GTi-6 Track Car - 200+ hp all N/A!
306 DTurbo Track beasty - 209.9hp - RIP
Posted 6th Mar 2013 at 19:07
rikky 🦔

Location: cheshire

Registered: 28 Feb 2004

Posts: 26,791

Status: Offline

Post #5
any play in wheel? mine felt like wheelbearing at first but turned out to be balljoint

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306 rallye reproduction decals (full sets/individual decals) | 306 b-pillar textured vinyl weatherstrips
306 slam panel esso stickers | 306 yellow / orange / pension fund red side door badges
gti6 inlet manifold badges | 306 rear boot badges (p2/p3)
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Posted 6th Mar 2013 at 19:24
jammapic

Senior User

Location: Manchester

Registered: 11 Jun 2010

Posts: 778

Status: Offline

Post #6
No play that I can notice... I suspect I'm not strong enough to make it do it's 1 clunk as I have to set off pretty hard or brake like a loon....

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306 GTi-6 Track Car - 200+ hp all N/A!
306 DTurbo Track beasty - 209.9hp - RIP
Posted 6th Mar 2013 at 20:30
coskev

Seasoned Pro

Location: Oswestry

Registered: 01 Nov 2009

Posts: 3,132

Status: Offline

Post #7
Check subframe bolts are tightThumbs up

Also do a tightness check on everything thats been replaced.

Check ARB is central too, mine was not and wishbone used to touch it as it moved up/downWink

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Posted 6th Mar 2013 at 20:55
dendle89

Senior User

Location: Cardiff

Registered: 29 Sep 2009

Posts: 827

Status: Offline

Post #8
swiftyboi006 wrote:
Check the top mount for movement i had this on my p1


Also happened to me ! bloody annoying it was

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Posted 6th Mar 2013 at 21:01
JWP EFi

Turbo Legend!

Location: edinburgh

Registered: 07 Mar 2010

Posts: 2,163

Status: Offline

Post #9
i had exact same problem when i fitted my hard poly wishbone bushes, only did it at very low speed

and going from reverse to forward or when very lightly braking. i put my car up on a 4 post ramp

and got someone to drive it - couldnt see anything at all. after a couple of weeks the noise got worse

turned out to be a loose subframe!
Posted 6th Mar 2013 at 21:14
footah212

Senior User

Location: Paisley

Registered: 16 Sep 2010

Posts: 859

Status: Offline

Post #10
I had something similar , it turned out the nut at the top of the strut needed tightened by about 1/8 of a turn

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Posted 19th Mar 2013 at 22:07
aaron6

Seasoned Pro

Location: On the sofa in maidstone

Registered: 16 May 2006

Posts: 5,840

Status: Offline

Post #11
Check the exhaust isnt just catching the subframe. Mine did this. Looked like it should clear but when the engine moved it hit. Worth a look for sure.

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Posted 20th Mar 2013 at 11:19
iplay

Seasoned Pro

Location: Number Wang

Registered: 18 May 2006

Posts: 3,268

Status: Offline

Post #12
snapped spring, brake mounting bolts?
Posted 20th Mar 2013 at 21:18
gti6girl

Seasoned Pro

Location: Dartford

Registered: 19 Feb 2007

Posts: 2,692

Status: Offline

Post #13
Another vote for down pipe on the subframe.
Posted 20th Mar 2013 at 21:29
craig-gti6

Regular

Location: kidderminster

Registered: 01 Jul 2012

Posts: 205

Status: Offline

Post #14
Another vote for down pipe hitting subframe. I had the exact same problem, it sounded like the noise was coming from the drivers side and I was thinking it was probably the top mount. Anyway the other day I was sorting my exhaust out as it was on the p**s and I noticed the down pipe was quite close to the subframe. Since I sorted my exhaust I haven't had any more of those horrible clunking noises. Thank god, it was doing my head in
Posted 21st Mar 2013 at 02:50
jammapic

Senior User

Location: Manchester

Registered: 11 Jun 2010

Posts: 778

Status: Offline

Post #15
It was the lower arm front bolt needed nipping up

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306 GTi-6 Track Car - 200+ hp all N/A!
306 DTurbo Track beasty - 209.9hp - RIP
Posted 21st Mar 2013 at 17:51
jimmyhackers

Seasoned Pro

Location: birmingham

Registered: 14 Jun 2011

Posts: 1,090

Status: Offline

Post #16
just had this exact issue for the past while. was the lower arm front bolt that needed tightening like OP's problem.

its was quite strange as the noise sounded like it was coming from the driver side near my feet but the loose bolt was the passenger side.

also it seemed tight already but a little more elbow grease and she tightend about a half turn.
the drivers side was tight and didnt move.

noise is gone. happy days

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Posted 6th Jan 2024 at 15:48

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