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Quote: Originally posted by Toypop on 17 December 2004
Hurry up and take a pic of your mount now before it starts knocking! That way we will know what to make ours look like.My knock started after 600 miles.
everybody else seems to have done their own without problems, why dont you just try it?
Quote: Originally posted by FiXX on 13 December 2004
This is DEFINATELY the problem, (on mine anyway) but i dont see why anyone elses will be different. I used an old exhaust rubber and wrapped it round the mount temporarily and the noise was gone, just going to adjust it myself tomorrow morning. Nice one Faz182, nice one indeed, the noise has been doing my head in!
Agree, good post! Good detail in the cause by the diagrams also!Nice one Faz182.
Black 182 + Recaros
172beast -
" Boot it in 1st, 2nd, 3rd through the gears, knocks when it grips and continues to knock throughout all 3 gears for me, bang bang bang bang then smaller less consistent knock in 3rd "
Isnt this thread referring to the knocking that occurrs at low speed, whilst driving through traffic, on and off the accelerator ?
Your knocking sounds like traction control to me.
1
172beast
mk1 172 doesnt have traction control and Im not reffering the banging under wheelspin, I only get knocking when booting it, even if Im doing 30mph in 2nd and gun it, itll knock, is this not a cure for this form of knocking? Only knocking I get?
Black 182 + Recaros
No, this fixes the low speed "on / off" accelerator knocking. Well it did on my car. Perhaps Faz182 can confirm this as well.
We should give names to all these different knocking noises, so we know which is which.
Black 182 + Recaros
I have not heard anyone mention knocking on the 172 MK1. I owned the MK1 and it never knocked. Only after purchasing the 172 MK2 did all the problems start.
1
172beast
Lol so many knocks, its all very confusing!
Black 182 + Recaros
I drive a "Clio Knock-Knock" what do you drive ?
Black 182 + Recaros
Oh yes, a Clio Knock-Knock MK1
Just been out and played with my mount. I had a 1mm gap in between the surround and the rubber block closest to the front of the car.
I pulled the surround the other way so that when I tightened up the four bolts the 1mm gap was in between the surround and the rubber block closest to the driver. This drastically reduced the knocking on lift-off but created a little "tap" noise everytime I dabbed the throttle!
So I pulled the mount the other way and wedged it with a screwdriver so the gap was about 2mm on the front of the car side of the mount. I stuck a piece of cut-off innertube in the gap then released the wedge which completely sealed the gap and tightened up the four bolts. This seems to have cured the knock. If I really deliberately try to make it knock by doing stupid stuff it can make a slight noise but that is hardly surprising.
It would knock real bad before if I was accelerating in second but then changed up to third whilst at the same time completely lifting off. This appears to be cured. Will take it out later for a longer run to double check.
I dare say my rubber blocks will compress further so that I have a 5mm gap either side like other owners. Will cross that bridge when I come to it!
Well hats off to your man for coming up with this fix.
This knocking has been doing my tits in for a couple of weeks now, car has been in at reno 4 times now in 9 weeks ownership for other stuff, so this has saved me a further visit.
slackened the four bolts today and moved the black frame till it was more square on with the rubbers. wedged the engine forwards a little and jammed a piece of flat rubber about 1mm thick closest to the window rubber. tightened the bolts took it for a test drive and problem solved,
So cheers ma man for coming up with this fix, saved me any hassles with reno, as we all know how good they are at spotting and fixing faults.
Keevster
Faz does it fix the knock-knock-knock when starting the engine?
no, as far as I am aware this is the traction control kicking in to try and stop the wheels spinning, it just sounds like the engine is trying to jump out of the bay because it is cutting power to the front wheels and they sound like they are jumping.
This is not a fault but how the traction control system works to stop wheelspin.
Nope mate, tration control doesnt do that. My knocking noise is definately something to do with the mount,traction doesnt make a noise at all.My knocking noice happens as soon as the wheels loose grip before the traction control has anytime to kickin.So back to the original question,is it just a simple case of loosening the bolts,centering the mount and tightening???
i think you are mistaking traction control with ESP but I am no expert. The loud noise when booting it in first is the traction and is not what this thread is about.
what we are all talking about here happens at very low speeds and has nothing to do with losing grip, it is purely an engine moving problem when you lift off the accelerator when in traffic, there is a quiet single knock noise from the engine bay which is what this fix is for.
So does anyone know what is knocking on what ?
Ive adjusted as above - this has cured the knocking when lifting off the accelerator, etc in traffic, but still get a light knocking when going over cobbles or over a drop-kerb into drive way.
Ive varied the position of the surround and found that the knock occurs under different circumstances depending upon the position of the black bracket (eg: re-position it and cure the knocking when lifting off, but get a knock when changing gear).
Its frustrating not knowing exactly what is happening to make the knock..........any thoughts ??
its the mount! modified one being fitted tomorrow will try n post pics of the new one!
yeah, I know its the mount, but is it part of the component itself thats knocking or is the mount fouling on something else ?
Its the rubber bungs hitting against the surround as far as I could tell. If you read my post you will see I cut off a bit of old bike inner tube and used it to fill the gap. That stopped it altogether.
I had a very small gap, if you have a bigger gap you will need a bigger chunk of rubber.
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