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Is this normal - metallic contraction noises when cooling down?

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Old 23 September 2003 | 05:00 PM
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Purchased my first Scoob a week ago (a MY01 UK300 with PPP) so don't know if this is normal or not. I get metallic contaction "creaking" noises from the wheel arches as the car is cooling down. With the engine off these seem to go on for minutes before settling down. This occurs after journeys of just a few miles, not just the longer runs. No problem with the temperature gauge - seems to settle properly below half way throughout all journeys. I've never noticed cooling noises to this extent in any other car I've had. Is it a Scooby thing or do I have a problem somewhere?

Old 23 September 2003 | 05:08 PM
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Maybe brakes cooling down, there quite heavy cars.
Old 23 September 2003 | 05:29 PM
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You may also find the heatsheilds on the exhaust systems do creak very loud when they cool down.
Old 23 September 2003 | 05:29 PM
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Wouldn't bother me if it was just over long journeys but I get it when I go just a few miles which is worrying me a bit as I'm not someone who is particularly heavy on the brakes the majority of the time. I hope you are right however and that it turns out to be a minor issue to do with the brakes.

Any other suggestions?
Old 23 September 2003 | 05:37 PM
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things like exhausts will get very hot, even after only a few miles, check out how quickly your water temp rises. Only takes about 2 miles. The creaking noises you are hearing are just metal part contracting. Very normal, and evident on most cars I have owned.
Old 23 September 2003 | 10:44 PM
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Its definatly a scooby thing,its usually the heat sheilds cooling down,also sometimes on older scoobs they can get an annoying rattle on them.
Old 23 September 2003 | 11:11 PM
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mine does it
i kinda like it
turbo's get things very hot very quickly
you'll get used to it and maybe even grow to like
Old 24 September 2003 | 10:43 AM
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Emissions regulations apply from the moment the ignition key is turned, so an important factor in meeting emissions tests (regulatory tests, not MOT) is to get the catalysts up to working temperatures as soon as possible. So this is what engineers design exhausts systems to do, it doesn't take long, just a few miles.

I think SAAB (maybe Volvo ?) have a different system on one of their cars, they actually store exhaust fumes in a storage tank near the boot and only vent it to atmosphere, passing through the catalytic covertors a second time, once they are up to temperature.

Compare it with other scoobs of same year/model, if it's the same then just call it a design feature !
Old 24 September 2003 | 04:58 PM
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Mine pings and creaks a lot more than any other car I've had, but it seems to be perfectly normal, wouldn't worry about it.
Old 24 September 2003 | 05:31 PM
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Mine does it too.

I would say it is more of a ticking noise though rather than creaking.

Shouldn't worry about it.
Old 24 September 2003 | 09:55 PM
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Maybe its the fact the Sub has got an Aluminium block.
All my bikes did the same (pinging and creaking even after a couple of miles)
Old 24 September 2003 | 09:59 PM
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Many thanks to all of you for putting my mind at rest. I can get on with enjoying the car now!
Old 24 September 2003 | 10:24 PM
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it takes longer than 2 minutes to get the temps to a point you can start to drive hard. Water temp takes a few minutes, oil temp takes 12-15 minutes to get to a safe temperature to start driving it hard.
Old 25 September 2003 | 01:59 AM
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Talking

In the good old days, a car that was "pinging" and being rather accoustic was a sign of a car that had been driven enthusiastically, officer!!!!

Now my scoob does it all the time, even when just popping out for a short journey!

No worries!

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