exhaust sealant and o2 sensor

[Monster26]

hi all,
I am trying find a product I can use to seal my turbo elbow to the downpipe with an o2 sensor downstream.

I have read about not using products no safe for sensors but can not found a product that can live so close to a turbo and not cure rock solid. can anyone help with product? thanks mark

[wildoliver]

Can't you use a gasket?

[Pumaracing]

A properly linished and flat flange face should seal well enough anyway. A thin smear of Geocel Fire Block sealant rated up to 1500c might be your best option if it still leaks.

[Monster26]

thanks pumaracing, will look up that brand.
The mating surfaces are good, but I thought go belt and braces to be on the save side.
cheers, mark

[Monster26]

Monster26 said:

thanks pumaracing, will look up that brand.
The mating surfaces are good, but I thought go belt and braces to be on the save side.
cheers, mark

pumaracing is this stuff sensor safe as it looks to be a building product?
m

[stevieturbo]

Monster26 said:

hi all,
I am trying find a product I can use to seal my turbo elbow to the downpipe with an o2 sensor downstream.

I have read about not using products no safe for sensors but can not found a product that can live so close to a turbo and not cure rock solid. can anyone help with product? thanks mark

Loctite do a copper based silicone sealer.

Although I think your concerns over sealants that are not o2 sensor safe are a little too cautious.

Unless like some people you intend to empty the entire contents of the tube or tub into the engine or exhaust

[MGJohn]

Consider this.

Remove the sensor and replace with a bolt or an old U/S sensor to fill the hole.

Use the stuff on the Turbo-elbow-downpipe interface and run until sealant has cured. Then refit good O2 sensor.

[Monster26]

thanks chaps. I have taken the decision to fit without sealant and make sure the exhaust is held inplace with bracers to the gearbox.
thanks Mark.