Exhaust gasket

[dswiscrazy]

Which is the best exhaust gasket

[pmessling]

I used wurths rtv for my exhausts. It's good stuff and can be used on pretty much anything. Diff's, gearbox etc

http://item.mobileweb.ebay.co.uk/viewitem?itemId=2...

[scotty_d]

Is this for the manifolds? I was going to ask this as well.

[pmessling]

I used it on the manifolds.

[crypto]

If I'm correct there is no "gasket". Last time I used Loctite 5920 (this allows up to 400 degC, which is probably not enough)
http://www.ebay.co.uk/itm/LOCTITE-5920-Silicone-Co...

[ukkid35]

If you don't use the recommended Loctite compound you risk trashing the Lambdas.

[Chuggaboom]

ukkid35 said:

If you don't use the recommended Loctite compound you risk trashing the Lambdas.

Which is why I spent over an hour at a motor factor's in Bristol going through their stock looking for a metal gasket for the racer as I'm running a standard AJP and ECU.

Found one in the end from an Alfa Romeao that fitted with a slight fettle.

Only downside was they're not a "pair" like those for the rover V8, so they flop round while trying to install, but its doable.

[Tanguero]

It's a lot simpler and more reliable to just use the correct sealant. The joint is not designed to be gasketed.

[Jhonno]

Tanguero said:

It's a lot simpler and more reliable to just use the correct sealant. The joint is not designed to be gasketed.

Which is...?

[Tanguero]

Loctite High Temp 5920 as mentioned above.

[Jhonno]

Tanguero said:

Loctite High Temp 5920 as mentioned above.

Ah! Oops.. Thought that was just an "I used this.."

[Tanguero]

There are several similar products, the Wurth version is probably OK too. You just need to check that the manufacturer specifically says that it is "sensor safe" and that it is for high temperature use. I think the official figure on the Loctite is around 700F which has proved adequately durable on my car. It looked just as good after 5 years as when I first put it on.

[gruffalo]

I think ACT now make a prober gasket for the manifold on a AJP8.

[Tanguero]

All the gaskets on the ACT site are for Rover engines. The AJP manifold is not designed to use a gasket.

[Chuggaboom]

Tanguero said:

It's a lot simpler and more reliable to just use the correct sealant. The joint is not designed to be gasketed.

Hmn...two flat metal surfaces that meet and are held together with a pair of bolts....design ???

More like TVR just saved on having a gasket made....and also passed on the time/cost to the customer when his exhaust needs refitting by a dealer !

The gaskets I found are the double skinned metal type so I can remove/refit as many times as I like.

And no waiting time for the sealant to go off !!!

[Tanguero]

Chuggaboom said:

mn...two flat metal surfaces that meet and are held together with a pair of bolts....design ???

Flat??? You must have got one of the good ones then. Lack of flatness on the manifold is why you should use sealant rather than a gasket, but if it works for you...

[scotty_d]

Tanguero said:

Chuggaboom said:

mn...two flat metal surfaces that meet and are held together with a pair of bolts....design ???

Flat??? You must have got one of the good ones then. Lack of flatness on the manifold is why you should use sealant rather than a gasket, but if it works for you...

And to add to that you never hear about them blowing on the sealing faces like the Chims and griffs. Just via the cracks on the manifolds them selfs.

[ukkid35]

The AJP has no gaskets anywhere (AFAIA) that was a design feature.

Sadly mine does have rocker cover gaskets due to an overly aggressive head skim.

[gruffalo]

Tanguero said:

All the gaskets on the ACT site are for Rover engines. The AJP manifold is not designed to use a gasket.

I understand that but I believe that ACT have developoed them, I have them fitted on my car and they made it much easier to get a good reliable seal between th ehead and manifold with no risk of damage to the Lambdas.

[ridds]

Loctite 5910 or 5920 is fine.

You could use any silicone sealant, the important thing letting it cure properly first. 24hrs is fine.

Used Loctite for ages with no issues. Same goes for sealing the engine make sure it's cured before you expose it to any oil as the silicone wrecks the oil by making it very prone to aeration.