Manifold gasket blowing

[S6 Devil]

Just had an MOT an was told that the exhaust is blowing...only an advisory. The tester thought it was from both the manifild gasket and the cat flange and estimated that I would be losing about 30 bhp.

Am I right in thinking that the speed six doesn't have manifold gaskets but uses high temp rtv? Can I just unbolt the gaskets and use the rtv and fill the area round the flange to?

[-Jamie-]

Correct, its a high temp silicone on the manifold and clamps between manifold/cats. Just take off the clamps and clean off all the carbon ect.. and reseal.

[duff-man]

Good luck with this one! From what I've heard its a pig of job due to access...

[S6 Devil]

duff-man said:

Good luck with this one! From what I've heard its a pig of job due to access...

o

Just spoken to Andy at APM who also described it as a pig of a job. He's going to take a look next week.
Cheers guys!