Author Topic: Rattle. Rattle. Clunk.  (Read 4254 times)

sgould

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Rattle. Rattle. Clunk.
« on: 09 April 2015, 09:55:31 PM »
I have a noise that comes from the rear nearside when I drive over slightly rough road surfaces.  A bit like the noise when the front drop links go.

I've been trying to pin it down for ages, with no success.  So today I had a more determined go as the weather was good.  And I still failed.  :(

I have remover the dog guard.  Removed the parcel shelf.  Cleared out the boot completely, including the spare wheel.  I have discounted the wooden floor, because the rattle still occurred when I got my wife to drive the car with me sitting on the floor.  So it's unlikely to make a noise with my 15 stone on it.  Break? Yes.  Rattle? No!

I can hear the noise when the rear wheel climbs a small step in the concrete as I drive very slowly away from the parking space, and on uneven "rumbly" surfaces.

It only happenes when driving over a bump.  I can't get the noise if I bounce the rear end of the car.

Today I checked the exhaust.  It has to be hit really hard before it touches anything and then it makes the wrong sort of noise.

I also checkred the short drop links to the rear anti-roll bar and the bushes look fine.  Even and centred.

I thought that I had found the fault.  The Hirsch springs at 100,000 miles were not seated at the bottom on anything resilient.  If there was a rubber or plastic spring seat, it's gone.  When I pressed on the spring it moved in the seat and gave a metal to metal sound that felt about right.  So I oiled and greased the seat and I can now move the spring silently.  I hoped that I had found it, even though it didn't make a noise when I bounced the car.

Then I went for a drive, and the noise is still there!!  :'( :'( :'(
« Last Edit: 09 April 2015, 09:58:04 PM by sgould »
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Audax

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Re: Rattle. Rattle. Clunk.
« Reply #1 on: 10 April 2015, 07:24:25 AM »
The Hirsch springs at 100,000 miles were not seated at the bottom on anything resilient.  If there was a rubber or plastic spring seat, it's gone. 

I think that the spring seats are made from zinc, it's not uncommon for there to be nothing left.

jmblack

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Re: Rattle. Rattle. Clunk.
« Reply #2 on: 10 April 2015, 08:29:59 PM »
Sounds like what we've had on both cars. Rear trailing arm bushes. They looked fine but when replaced clunk gone! It sounded like something in the boot, not unlike a slightly loose dog guard.

sgould

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Re: Rattle. Rattle. Clunk.
« Reply #3 on: 11 April 2015, 07:04:46 AM »
I think I need to take it back to the dealer. They replaced all the rear bushes last summer.
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