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The mkiv Supra Owners Club

Help! Rear Knocking noise


Paul Laing

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anyone know why i'm getting a knocking noise on the rear suspension? It's only on the drivers side and only happens when i go over a bump or dip in the road.

 

Anyone know why this is happening or what it is?

 

It's not bad, just if it's the suspension it needs sorting!!!!

 

Cheers,

 

Paul

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i had a bad one when i booted it or over bumps, turned out the tyres were sticking outside the arches and when you bboted it it droped doen and scored the rubber on the tyres.it had to big spacers on put small ones on and it cured it,

it was the wheels that were on the car when i got so not a good set up

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plus it's only started happening for a month or so. Toyota said i needed to be booked in for them to just look at it. The one near me is crap!!!

 

£240 to change timing belt aswell!!!!!!! having a laugh or what?

 

Is there a way of checking to see if it's shocks? will they be leaking??

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Ive spent about £2000 sorting out a few rear end noises in 6 months, this is not a fun area.

 

The best thing to do is the cheap things first.

 

1. Remove everthing out of the rear of the car that could move. Tyre, jacks etc.

 

Go for a drive. Try and alienate the speed and type of bump that shows the noise up. Whether it happens going round corners and if it happens from cold or after a few miles or only after high speed runs when things get really warmend up. Is it a knocking noise or a rotational grind.

 

2. If its still there after that see if the wheels have made contact with any part of the car. Check the exhaust is secure and free from too much movement.

 

3. if its knocking have a look under the shock absorbed rubbers to see if the bump stop has fallen to pieces and found its way down the S/A. i think Midlife had this happen to him.

 

4. if you have had any aftermarket springs or s/a work done some mechanics have occaisonally fitted the bump stop upside down which can also make a knocking sound.

 

5. If possible check the condition of the rubbers on the upper suspension arm and control arms.

 

6. If these yeild no results then it could be your shocks, but at least their pretty cheap and will only be about 3 hours labour for both sides.

 

7. if its more of a grind thats a different matter.

 

Are your tyres wearing evenly BTW? And are you near any of the usual specialist CW/Leon etc A trip down one of these will save you quite abit of time.

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