ryanlockie
Member
Registered: 25th May 10
User status: Offline
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Hi there I have a really bad tin-like rattle when I rev the engine slightly comes in at about 1200 rpm. On idle the rattle fades so its not really audible. I've been under the car and knocked the exhuast and it seem to be coming from my silence decat.
I don't think I had a very good manifold to cat gasket (The metal wire mesh ring) could this cause a tinny rattle?
Also could the noise be any blowing?
Cheers!
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shaunmods
Premium Member
Registered: 12th Mar 07
Location: Glascote, Staffordshire
User status: Offline
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Yep sounds like a blow from manifold to decat join  Mine did this and it was a proper loud screeching and rattling sound.
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AlexW
Member
Registered: 25th Oct 08
Location: Essex
User status: Offline
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Have it running and hold your hand around it, see if you can feel it blowing
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ryanlockie
Member
Registered: 25th May 10
User status: Offline
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Yeah will do, can anything come loose inside the decat? Or will it just blow out?
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AlexW
Member
Registered: 25th Oct 08
Location: Essex
User status: Offline
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Only thing it can do is blow, Other than make noise lol
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Fro
Member
Registered: 20th Jun 06
Location: Rainham, Essex Drives: A3 2.0TDi Sport
User status: Offline
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No heat shield?
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ryanlockie
Member
Registered: 25th May 10
User status: Offline
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I dont think there is a heatshield as the rattle come from the decat.
Also it rattles if its knocked when not idleing therefore surely it's not blowing?
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alan-g-w
Member
Registered: 9th Nov 07
Location: Glasgow
User status: Offline
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Whip it off and have a look?
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Mertin
Member
Registered: 12th Oct 05
Location: Scotland
User status: Offline
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I used to get a rattle often on my mk3 astra. Replaced the centre section which included the silencer and rattle stopped. Mustve been loose parts in the silencer.
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