mossy
Member
Registered: 22nd Jan 04
Location: Manchester Drives: GSi
User status: Offline
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dunno what it is but its on icemans old corsa
looks like his exhaust manifold? 4 branch thingy at front bottom of engine...ne way looks like this is wrapped in summat?
just wondered why this was,what its wrapped in and benefits/reasons?
 
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Twiggy
Member
Registered: 15th Oct 04
User status: Offline
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somethink to do with getting rid of the heat... so engine bay temp is lower??? 
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white_sri
Member
Registered: 24th Jan 05
Location: Swadlincote, Derbyshire
User status: Offline
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you use it on your exhaust manifold to insulate the heat so it doesnt escape into the engine bay, this helps especially if you dont have a sealed induction kit.
i wouldnt recommend doing it though as it can sometimes cause the manifolds to crack.
i would recommend you use a heat shield of somekind instead
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iceman
Member
Registered: 22nd Jul 00
Location: Berkshire
User status: Offline
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its exhaust wrap matey it helps disperse the exhaust heat down through the pipes more efficiently give a cool engine bay
http://www.proven-products.co.uk/products/cooltek.htm
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jr
Member
Registered: 20th May 02
Location: Kent
User status: Offline
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i personaly wouldnt use it
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SetH
Member
Registered: 15th Jul 01
User status: Offline
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quote:
Originally posted by white_sri
you use it on your exhaust manifold to insulate the heat so it doesnt escape into the engine bay, this helps especially if you dont have a sealed induction kit.
i wouldnt recommend doing it though as it can sometimes cause the manifolds to crack.
i would recommend you use a heat shield of somekind instead
Please elaborate on why heat wrapping a manifold may cause it to crack?
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white_sri
Member
Registered: 24th Jan 05
Location: Swadlincote, Derbyshire
User status: Offline
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quote:
Originally posted by SetH
quote:
Originally posted by white_sri
you use it on your exhaust manifold to insulate the heat so it doesnt escape into the engine bay, this helps especially if you dont have a sealed induction kit.
i wouldnt recommend doing it though as it can sometimes cause the manifolds to crack.
i would recommend you use a heat shield of somekind instead
Please elaborate on why heat wrapping a manifold may cause it to crack?
i dont know why it does it but ive heard of people using the exhaust wrap stuff and then it causes the manifold to crack
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broster
Premium Member
Registered: 6th Dec 02
Location: Drives: E39
User status: Offline
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it does because it keeps the heat in and small movements in the exhaust system are then able to crack the heat weakened welds....
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SetH
Member
Registered: 15th Jul 01
User status: Offline
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i see.
100`s of scooby owners have aftermarket wrapped manifolds, not heard of that happening before.
must just happen to shitty corsa ones then.
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Ian
Site Administrator
Registered: 28th Aug 99
Location: Liverpool
User status: Offline
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I've seen it happen to all types of car, the metal doesn't know what its getting bolted to 
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langey
Member
Registered: 7th Sep 03
Location: Wigan
User status: Offline
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quote:
Originally posted by SetH
i see.
100`s of scooby owners have aftermarket wrapped manifolds, not heard of that happening before.
must just happen to shitty corsa ones then.
well it wouldnt be the shitty corsa as the mainfold wasnt off a corsa was it?
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James R
Member
Registered: 4th Feb 03
Location: 205GTi16/306GTi16
User status: Offline
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quote:
Originally posted by SetH
100`s of scooby owners have aftermarket wrapped manifolds, not heard of that happening before.
Pics if you have them.
The wrap causes the metal to get baked, as it can't dump the heat out of it.
I'll put it like this, Ahely exhausts have cars running their manifodl and race system, and they are 13years old, and only ever needed new centre sections because the sound deadening gets cooked, but the manifolds are still as factory.
They've had ppl send them back after one weekends rally event due to bits of them melting from the heat, and it's because they're been wrapped.
Infact the best trreatment for the exhaust is an aliminised finished to help disipate heat faster, then shield the bits of the car you don't want to get hot from the exhaust.
Ring ashely and chat to Brian about if you want to find out.
James
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SVM 286
Member
Registered: 13th Feb 05
Location: pain
User status: Offline
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quote:
Originally posted by SetH
quote:
Originally posted by white_sri
you use it on your exhaust manifold to insulate the heat so it doesnt escape into the engine bay, this helps especially if you dont have a sealed induction kit.
i wouldnt recommend doing it though as it can sometimes cause the manifolds to crack.
i would recommend you use a heat shield of somekind instead
Please elaborate on why heat wrapping a manifold may cause it to crack?
The wrapping causes the inside of the area that is covered to become super-heated because there is no longer the external surface area to dissipate heat.
The effect of superheating the steel changes the structure of the material at a molecular level by concentrating the carbon content and making the metal brittle, and therefore, far more vulnerable to cracking from stress, vibration or impact. 
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