#1: Can't find where knocking sound is coming from Author: Tolkienfan001, Location: SpaldingPosted: Mon Feb 11, 2013 9:14 am ---- Right I will try to explain the problem.
It sounds like a hollow knocking sound somewhere behind the dash around the steering wheel / instrument panel area.
In terms of suspension issues. I am waiting to replace both track rod ends as the garage has checked all bearings suspension etc and these were the only faults found. Ns has play in it and os rubber has cracked and collapsed.
I have checked the comms unit and it is secure. I have checked under the dash the mfd surround the fuse box cover the pollen filter. It is not any of these things rattling or knocking.
The noise usually happens going over small pot holes in the road. But not every time?!?! Could I be hearing the track rod end echoing through the steering?
I am at a loss. Has any one got any ideas please?
Thanks
#2: Re: Can't find where knocking sound is coming from Author: Tolkienfan001, Location: SpaldingPosted: Mon Feb 11, 2013 9:50 am ---- Ok just been out in the car. Had to nip into town. Didn't make the sound once! What is going on!!
Could it be my bonnet. When it is closed and I press it there is a similar sound and a small amount of play. Should the bonnet fit tight??
#3: Re: Can't find where knocking sound is coming from Author: 206gti_chris, Location: SussexPosted: Mon Feb 11, 2013 9:55 am ---- example of most french cars i think
#4: Re: Can't find where knocking sound is coming from Author: Tolkienfan001, Location: SpaldingPosted: Mon Feb 11, 2013 9:58 am ----
206gti_chris wrote:
example of most french cars i think
Not had a French car before. Should I just turn my music up?
#5: Re: Can't find where knocking sound is coming from Author: kandlbarrett, Location: SwindonPosted: Mon Feb 11, 2013 12:28 pm ---- Buy an Alfa 147 or 156 and learn what suspension clunks, thumps, rattles and squeaks can really be like.
#6: Re: Can't find where knocking sound is coming from Author: Tolkienfan001, Location: SpaldingPosted: Mon Feb 11, 2013 12:29 pm ----
kandlbarrett wrote:
Buy an Alfa 147 or 156 and learn what suspension clunks, thumps, rattles and squeaks can really be like.
Ok starting to get the impression I am being too picky.
#7: Re: Can't find where knocking sound is coming from Author: kandlbarrett, Location: SwindonPosted: Mon Feb 11, 2013 12:38 pm ---- No you aren't. A knock shouldn't be there but they can be buggers to trace. Keep trying!
The big problem is that they are often easier to diagnose when you hear it yourself and the noise is usually tricky to describe accurately.
147 / 156
Front bottom wish bones knock.
Front top wishbones squeak.
Front anti roll bar knocks and is felt under your feet.
Front drop links knock but are quieter than bottom wishbione and easy to diagnose.
Rear transverse arms (4 off) fall apart and easy to see.
Rear drop links knock and easy to see.
Rear antiroll bars knock.
Almost no suspension component on these lasts more than 50k and most are 25 - 40k
Knocks drive you nuts - you will find it eventually.
#8: Re: Can't find where knocking sound is coming from Author: Tolkienfan001, Location: SpaldingPosted: Mon Feb 11, 2013 12:42 pm ----
kandlbarrett wrote:
No you aren't. A knock shouldn't be there but they can be buggers to trace. Keep trying!
The big problem is that they are often easier to diagnose when you hear it yourself and the noise is usually tricky to describe accurately.
147 / 156
Front bottom wish bones knock.
Front top wishbones squeak.
Front anti roll bar knocks and is felt under your feet.
Front drop links knock but are quieter than bottom wishbione and easy to diagnose.
Rear transverse arms (4 off) fall apart and easy to see.
Rear drop links knock and easy to see.
Rear antiroll bars knock.
Almost no suspension component on these lasts more than 50k and most are 25 - 40k
Knocks drive you nuts - you will find it eventually.
The most annoying part is it is intermittent. When it does happen, it only happens on light bumps on the road. Steering does not replicate it. Bouncing the car does not replicate it. The garage have checked all suspension and wheel parts.......
#9: Re: Can't find where knocking sound is coming from Author: kandlbarrett, Location: SwindonPosted: Tue Feb 12, 2013 1:31 pm ---- Exhaust?
Spare wheel?
Battery?
Engine mounting?
Wheel bearing?
#10: Re: Can't find where knocking sound is coming from Author: Tolkienfan001, Location: SpaldingPosted: Tue Feb 12, 2013 1:39 pm ----
Wheel bearings have been checked and are not the issue.
The spare wheel has been checked and is not loose.
The exhaust has only been on since oct. it has been checked and is still ok.
Battery??
Unsure how to check engine mountings?
#11: Re: Can't find where knocking sound is coming from Author: gaffa786, Location: 2 Places at oncePosted: Tue Feb 12, 2013 9:42 pm ---- Top mounts? I took my car to a garage. They jacked up the car and tried to check the mounts but seemed ok. But when they put the car back to the ground you could hear the clunk again. So they jacked it up again and pushed the wheel up so there was upwards force on the strut and only then could you see that the top mount had play in it. Sounds like the wrong way to check but got the job done
#12: Re: Can't find where knocking sound is coming from Author: Tolkienfan001, Location: SpaldingPosted: Wed Feb 13, 2013 1:03 am ----
gaffa786 wrote:
Top mounts? I took my car to a garage. They jacked up the car and tried to check the mounts but seemed ok. But when they put the car back to the ground you could hear the clunk again. So they jacked it up again and pushed the wheel up so there was upwards force on the strut and only then could you see that the top mount had play in it. Sounds like the wrong way to check but got the job done
I could be this?
The strange thing is I have not heard it at all for the last couple of days?
#13: Re: Can't find where knocking sound is coming from Author: richb, Location: SelbyPosted: Thu Feb 14, 2013 8:44 am ---- Had the same on mine. About 20k after doing the timing belt started to get a knock.
Just done timing belt again after 45k and top engine mount had unscrewed slightly.
It sounded exactly as though it was where you say your noise is and did the same disappearing routine.
As you leave actual rubber mount alone doing timing belt I never checked it first time around. Locktited in place now!
#14: Re: Can't find where knocking sound is coming from Author: Tolkienfan001, Location: SpaldingPosted: Thu Feb 14, 2013 8:48 am ---- Where do I find this please?
#15: Re: Can't find where knocking sound is coming from Author: richb, Location: SelbyPosted: Thu Feb 14, 2013 8:55 am ---- Mines a hdi but I suspect it to be similar
Look at left hand side of engine and you will see a piece of ally sticking out and meeting the inner wing. It's a pain as you have to remove the alloy part of the mount to get at the rubber. Which looks like an old British Leyland gearbox mount on steroids!
#16: Re: Can't find where knocking sound is coming from Author: Tolkienfan001, Location: SpaldingPosted: Thu Feb 14, 2013 10:00 am ----
richb wrote:
Mines a hdi but I suspect it to be similar
Look at left hand side of engine and you will see a piece of ally sticking out and meeting the inner wing. It's a pain as you have to remove the alloy part of the mount to get at the rubber. Which looks like an old British Leyland gearbox mount on steroids!
Ok found it. Anyway to test it?
#17: Re: Can't find where knocking sound is coming from Author: richb, Location: SelbyPosted: Thu Feb 14, 2013 10:14 am ---- I tried rocking it in situ when I got the noise but it didn't locate it then.
Only quick way I can think is to take ecu out of the way, remove the top bump stop and the buffer ( if they are fitted!)
Then you should see a torx head at the top thread. I'd slacken the nut on the mount, carefully jack up the engine, just enough to take the weight and then try and tighten the torx screw on the bobbin. If it moves its come loose. Mine wasn't even half a turn loose but that was enough to annoy the hell out of me at times, plus change suspension bits that were probably ok.
Here's a pic with the ecu removed, bear in mind it's a 2.0 hdi and may be slightly different. The black strap is the top anti bump bracket and the buffer is under it
Ps car isn't rusty, I wax oiled it when it was a month old so it's just muck!!
.
#18: Re: Can't find where knocking sound is coming from Author: Tolkienfan001, Location: SpaldingPosted: Thu Feb 14, 2013 10:24 am ---- Thank you!
#19: Re: Can't find where knocking sound is coming from Author: richb, Location: SelbyPosted: Thu Feb 14, 2013 10:38 am ---- No probs. cars in bits anyway!
Just remember to jack engine up enough to be clear of the bobbin top, not the top of the threads. This should allow it turn.
#20: Re: Can't find where knocking sound is coming from Author: Jammie_1989, Location: ManchesterPosted: Tue Feb 19, 2013 8:27 am ---- Make sure all bonnet fixings are tight also not sure if the bonnet has a pin connection like the doors and boot. If so it could be worn. Been looking for a rattle on mine for nearly a year and turned out to be worn door pins. Wrap some tape around if you find one to see if the noise stops. If so then its probably that. Also found that its hard to pinpoint a noise it might sound like its in the dash but be at the front of the car.
#21: Re: Can't find where knocking sound is coming from Author: Tolkienfan001, Location: SpaldingPosted: Tue Feb 19, 2013 8:38 am ---- I think my drivers door pin is knocking!
#22: Re: Can't find where knocking sound is coming from Author: Tolkienfan001, Location: SpaldingPosted: Thu Feb 21, 2013 5:47 am ---- So, I am still working on this!
I have found the ecu box was making a lot of noise and had a lot of movement. This is now sorted.
The coolant bottle was rattling and loose. This is now sorted.
My next item on the list is the cylindrical rod that runs behind the dash for the brake pedal. There is some play in this and it knocks if I move it from left to right. Is there anyway to tighten this? There are some bolts on the passenger side. Not sure if I should mess with it.
Thanks
#23: Re: Can't find where knocking sound is coming from Author: AX-Rated, Location: Swansea, WalesPosted: Thu Feb 21, 2013 7:41 am ---- I'm sure the brake spindle has play in it so you can put the brake lights on without braking to get annoying pricks off your ass.
#24: Re: Can't find where knocking sound is coming from Author: Tolkienfan001, Location: SpaldingPosted: Thu Feb 21, 2013 8:10 am ----
AX-Rated wrote:
I'm sure the brake spindle has play in it so you can put the brake lights on without braking to get annoying pricks off your ass.
Ok thanks for that. The knocking seems to have stopped now I have sorted the bits under the bonnet.
We are not responsible for comments posted by our users, as they are the property of the poster
Interactive software released under GNU GPL,
Code Credits,
Privacy Policy
Membership:
Latest: 
New Today: 0
New Yesterday: 0
Overall: 17125
Online Now [111]:
Visitors: 110
Members: 0
Staff Online Now:
Page Views:
General
