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Author Topic: Noisy rattling at certain rpm  (Read 1241 times)

Offline maxp

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Noisy rattling at certain rpm
« on: 25 March 2009, 22:42 »
There's a severe tinny rattling noise that seems to come on from about 3200rpm to 3350 rpm. Its definately not coming from the bonnet.

Trying to consider all the things it can be without putting it on slits.

The obvious (to me anyway  :huh:) would be the exhaust pipe. But could it be something else like the heat shield?
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Offline Benrevs

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Re: Noisy rattling at certain rpm
« Reply #1 on: 25 March 2009, 23:09 »
If your heat shield is still on there I would say its almost certain! They are bastards to get off mind. Ben
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Offline danny_p

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Re: Noisy rattling at certain rpm
« Reply #2 on: 25 March 2009, 23:43 »
my money is on heat sheild as well,  be warned it will draw blood
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all the VW's have gone bar 1.

Offline Whaleshark

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Re: Noisy rattling at certain rpm
« Reply #3 on: 26 March 2009, 14:01 »
There is a bolt that runs between the two downpipes above where they merge and the heat shield.  These can get loose and rattle.
Prepare to loose your knuckles!!  A quick fix(but won't last for ever) is to put some fire gum either end of the bolt.  Think I got away with about 1000 rattle free miles by doing this.

Cheers 
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Offline maxp

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Re: Noisy rattling at certain rpm
« Reply #4 on: 26 March 2009, 20:27 »
Thanks for all the replies!
Sounds like its coming from just infront of the passenger seat.
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Offline Mk2George

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Re: Noisy rattling at certain rpm
« Reply #5 on: 26 March 2009, 20:43 »
Heat shield attached to the downpipe for sure, Ive had to remove 2 of the buggers before!
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Offline Ben Lessani

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Re: Noisy rattling at certain rpm
« Reply #6 on: 28 March 2009, 08:04 »
If it is the heat shield, keep your patience - stupid piece of crap!. Its pretty awkward to get to because it sits just above the subframe. I managed to loosen mine up a little more by using a 4' stake and whacking it from above. Then I got under and cut a section off it.

It was a right arse though because my grinder *only just* fit in the gap to cut it and I was literally half an inch from chopping the PAS lines to bits.




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Offline maxp

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Re: Noisy rattling at certain rpm
« Reply #7 on: 28 March 2009, 15:50 »
Loving the collective amount of venom people have for these things.
Ben: Did you bother putting a new one back on afterwards?
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Offline twistedblack69

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Re: Noisy rattling at certain rpm
« Reply #8 on: 28 March 2009, 16:23 »
I've got the same problem at about 2k and sussed that it was the heat shield. Not looking forward to getting it off now, thanx guys haha
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Offline Ben Lessani

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Re: Noisy rattling at certain rpm
« Reply #9 on: 28 March 2009, 23:49 »
I didn't bother replacing it - not really worth the effort in my eyes.

I guess in the real world it *might* stop my PAS fluid from heating up but only to a marginal degree. Most garages that come across rotten heat shields just bin them off and don't bother replacing them.
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