MINI2

Richard Crofts · Jun 20th, 2007, 01:15 PM

Guys

Anyone know the sorts of temps the exhaust on an S has to cope with. Want to know wether I can use a silcone sealant on it bu the various ones have diofferent heat ranges...what sort of max temp do I have to ensure the sealant can deal with?

Ta

Richard

Richard Crofts · Jun 20th, 2007, 02:07 PM

ball parks will do..we talking under 250 or under 500 or under 100 degrees or what.

MiniPetrolHead · Jun 20th, 2007, 02:37 PM

On my mates Mini cooperS after a good thrashing the break discs, manifold and cat were glowing orange, it will have to cope with ver high temperatures even with normal driving.

Easyest thing to do is get the sealant with the highest temperature rating

Alex

ScottyBoy · Jun 20th, 2007, 02:45 PM

Im sure when i got a snapped bolt replaced on my Cat he said something like the manifold reaches tempretures of 430 Degreees, or i may be just thining that i heard that. lol.

Richard Crofts · Jun 20th, 2007, 03:01 PM

So something that can deal with 500 should be alright then I guess. Shes only running around 220 brake and its just to seal the gasket joints and the centre pipe on my milly. Exhaust assembly paste seems to be a load of *****

ScottyBoy · Jun 20th, 2007, 04:26 PM

I would imagine so.... i was wondering why you wer not using exhaust paste but if youve tried it this may be a better option.

roland2003 · Jun 20th, 2007, 05:51 PM

Hi silicon sealants will murder the 02 sensors, even cat to catback flange is a bit risky,further back still should be ok.
Best Regards Roland GTT

Richard Crofts · Jun 21st, 2007, 10:36 AM

Whats suggested as the best way to seal the joints on the milly manifold/exhaust system then...exhaust paste, silcone and a gasket, just a gasket or exhaust paste with a gasket? Thoughts guys as I need to try and do something before sunday if I can manage it.

Richard Crofts · Jun 21st, 2007, 12:58 PM

How is the joint at the cat an issue roland as the o2 sensor is upstream by quite a bit. Is it a situation of vacuum sucking bit onto the sensor as gas flow from the engine drops on overrun or something?

roland2003 · Jun 21st, 2007, 04:18 PM

Hi Richard, it may be fine but the second sensor is pretty close to that flange although as you say downstream. The Miltek gaskets are pretty good, see if they will supply you a couple of new ones. Also check both flanges for flatness with a straight edge.
As a second choice 'used' Miltek gaskets with a thin smear of exhaust sealant paste on both sides .
Best Regards Roland GTT

Richard Crofts · Jun 22nd, 2007, 11:24 AM

Top man...hopefully its a short term measure as i fancy a GTT mani and a borla agressive system all brand new soon. My second hand milly might go up for sale as its agressive but I want larey!

Bhozar · Jun 22nd, 2007, 03:18 PM

Quote: Originally Posted by Richard Crofts (original)

Top man...hopefully its a short term measure as i fancy a GTT mani and a borla agressive system all brand new soon. My second hand milly might go up for sale as its agressive but I want larey!

Crofty, the Larey thug! I just cant see it somehow

Jun 20th, 2007, 01:15 PM	#1
Richard Crofts THE STICK Join Date: Feb 2003 Location: Worcestershire WR15 Local Time: 11:57 PM Posts: 3,064 Offline	Exhaust Tempretures?? Guys Anyone know the sorts of temps the exhaust on an S has to cope with. Want to know wether I can use a silcone sealant on it bu the various ones have diofferent heat ranges...what sort of max temp do I have to ensure the sealant can deal with? Ta Richard

Jun 20th, 2007, 05:51 PM	#7 (permalink)
roland2003 MINI 2 Sponsor GT Tuning Join Date: Jan 2004 Local Time: 11:57 PM Posts: 2,736 Offline	Hi silicon sealants will murder the 02 sensors, even cat to catback flange is a bit risky,further back still should be ok. Best Regards Roland GTT www.gttuning.com

Jun 21st, 2007, 04:18 PM	#10 (permalink)
roland2003 MINI 2 Sponsor GT Tuning Join Date: Jan 2004 Local Time: 11:57 PM Posts: 2,736 Offline	Hi Richard, it may be fine but the second sensor is pretty close to that flange although as you say downstream. The Miltek gaskets are pretty good, see if they will supply you a couple of new ones. Also check both flanges for flatness with a straight edge. As a second choice 'used' Miltek gaskets with a thin smear of exhaust sealant paste on both sides . Best Regards Roland GTT www.gttuning.com

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Jun 20th, 2007, 02:07 PM	#2 (permalink)
Richard Crofts THE STICK Join Date: Feb 2003 Location: Worcestershire WR15 Local Time: 11:57 PM Posts: 3,064 Offline	ball parks will do..we talking under 250 or under 500 or under 100 degrees or what.

Jun 20th, 2007, 02:37 PM	#3 (permalink)
MiniPetrolHead 263bhp / 284.55Nm Torque My Classifieds Join Date: Oct 2006 Location: Eastbourne E.Sussex Local Time: 11:57 PM Posts: 678 Offline	On my mates Mini cooperS after a good thrashing the break discs, manifold and cat were glowing orange, it will have to cope with ver high temperatures even with normal driving. Easyest thing to do is get the sealant with the highest temperature rating Alex

Jun 20th, 2007, 02:45 PM	#4 (permalink)
ScottyBoy Obsessive Car Cleaner OCC My Classifieds Join Date: Jul 2006 Location: Thornaby NE Local Time: 11:57 PM Posts: 2,874 Offline	Im sure when i got a snapped bolt replaced on my Cat he said something like the manifold reaches tempretures of 430 Degreees, or i may be just thining that i heard that. lol.

Jun 20th, 2007, 03:01 PM	#5 (permalink)
Richard Crofts THE STICK Join Date: Feb 2003 Location: Worcestershire WR15 Local Time: 11:57 PM Posts: 3,064 Offline	So something that can deal with 500 should be alright then I guess. Shes only running around 220 brake and its just to seal the gasket joints and the centre pipe on my milly. Exhaust assembly paste seems to be a load of *****

Jun 20th, 2007, 04:26 PM	#6 (permalink)
ScottyBoy Obsessive Car Cleaner OCC My Classifieds Join Date: Jul 2006 Location: Thornaby NE Local Time: 11:57 PM Posts: 2,874 Offline	I would imagine so.... i was wondering why you wer not using exhaust paste but if youve tried it this may be a better option.

Jun 21st, 2007, 10:36 AM	#8 (permalink)
Richard Crofts THE STICK Join Date: Feb 2003 Location: Worcestershire WR15 Local Time: 11:57 PM Posts: 3,064 Offline	Whats suggested as the best way to seal the joints on the milly manifold/exhaust system then...exhaust paste, silcone and a gasket, just a gasket or exhaust paste with a gasket? Thoughts guys as I need to try and do something before sunday if I can manage it.

Jun 21st, 2007, 12:58 PM	#9 (permalink)
Richard Crofts THE STICK Join Date: Feb 2003 Location: Worcestershire WR15 Local Time: 11:57 PM Posts: 3,064 Offline	How is the joint at the cat an issue roland as the o2 sensor is upstream by quite a bit. Is it a situation of vacuum sucking bit onto the sensor as gas flow from the engine drops on overrun or something?

Jun 22nd, 2007, 11:24 AM	#11 (permalink)
Richard Crofts THE STICK Join Date: Feb 2003 Location: Worcestershire WR15 Local Time: 11:57 PM Posts: 3,064 Offline	Top man...hopefully its a short term measure as i fancy a GTT mani and a borla agressive system all brand new soon. My second hand milly might go up for sale as its agressive but I want larey!

Jun 22nd, 2007, 03:18 PM	#12 (permalink)
Bhozar Overly excited!! My Classifieds Join Date: Aug 2006 Location: Worcestershire Local Time: 11:57 PM Posts: 1,232 Offline	Quote: Originally Posted by Richard Crofts (original) Top man...hopefully its a short term measure as i fancy a GTT mani and a borla agressive system all brand new soon. My second hand milly might go up for sale as its agressive but I want larey! Crofty, the Larey thug! I just cant see it somehow

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