How Do I Increase My Fuel Economy/Performance??

[threedogs]

Good thread dig but
Dom I think its a RTV exhaust type sealant very good for its chosen job

[dom14]

Good thread dig but
Dom I think its a RTV exhaust type sealant very good for its chosen job

Ok, cool. I didn't know we can use silicon type sealant on exhaust. I thought it would simply burn and cook itself in no time.
The orange colour of the sealant is probably not the original colour??!! May be it turned orange from heat?!

The reason is that I'm interested in a sealant that can hold the seal of exhaust pipe flange to flange or manifold to head(at least for few days), in
a situations the gasket fails due to a leak or wear/tear.
Thanx mate.

P.S. My apologies for

[pat in a troll]

"muffler cement" in it's various forms can patch exhaust leaks, but isn't really a long-term solution. it'd definitely stop exhaust gases from exiting where they shouldn't but if an exhaust is already leaking at a flange gasket, the flange gasket would cost as much as a repair product. here are some forms of it (that supercheap carry)
http://www.supercheapauto.com.au/onl...63#Description
http://www.supercheapauto.com.au/onl...ecommendations
http://www.supercheapauto.com.au/onl...32#Description
http://www.supercheapauto.com.au/onl...ecommendations

[dom14]

"muffler cement" in it's various forms can patch exhaust leaks, but isn't really a long-term solution. it'd definitely stop exhaust gases from exiting where they shouldn't but if an exhaust is already leaking at a flange gasket, the flange gasket would cost as much as a repair product. here are some forms of it (that supercheap carry)
http://www.supercheapauto.com.au/onl...63#Description
http://www.supercheapauto.com.au/onl...ecommendations
http://www.supercheapauto.com.au/onl...32#Description
http://www.supercheapauto.com.au/onl...ecommendations

Hi mate,
I've tried all of them in the past except number 3. I still got Maniseal and Permatex putty.
What I was referring to was something you apply on the flange gasket.
Lets say the flange surface is either pitted or warped and regardless of putting a new flange gasket
it would leak and cause more damage to the gasket and the flange.
I was wondering whether there's a semi-permanent(or permanent) sealant that I can paste on the flange gasket and flange face
before I fit the gasket.

[Robo]

Hi mate,
What is the sealant between the gasket and the extractors in the second photo?

Hi temp exhaust silicon.
the extractors leaked a bit previously.
Also very carefully surface ground and straight edged the extractors flange to help flatten them, to seal old leak and it worked well.

[threedogs]

Old school was to wipe the gasket with oil , but not those silver perforated type.
There is a hi temp Sikaflex thats blue and may help.
Go down to a speed shop and have a talk with them

[dom14]

Old school was to wipe the gasket with oil , but not those silver perforated type.
There is a hi temp Sikaflex thats blue and may help.
Go down to a speed shop and have a talk with them

I went to Burson and got Permatex exhaust sealant. Stuff really works. I only applied a very thin layer.
I think it's high temperature silicon with very fine copper dust in it. That's probably what gives them the high temperature resilience as well as orange colour. Sales rep said ideally we are not suppose to use silicone sealant in exhausts(of course)
I reckon the idea of using silver perforated multilayer gaskets is to gasket to fail in case of excessive pressure build up in the exhaust?! If that's the case, makes me wonder whether the two flange gaskets that failed in mine might have something to do with excess muffler pressure build up.
I'll have to do the vacuum test to confirm that obviously.