Thermal insulator under trumpets - question

[jazzdude]

I have just removed the plenum and what look like carbon trumpets to get my fuel rail and injectors off for cleaning and checking.

Under the trumpets is what looks like a thick red rubber gasket and I cannot see any sign of sealant used by the previous owner.

When I bolt back the trumpet base, do I need to seal the joint between this rubber mat and the underside of the trumpet base?

Also, the plenum seemed to have a trace of some kind of sealant between the plenum lip and the top of the trumpet base. Should I smear a thin line of blue Hylomar to the top of the trumpet base before lowering the plenum back on to it?

[sapper]

When I put an insulator on mine I used a bit of hylomor blue sealant to be on the safe side

[jazzdude]

Was that just on the plenum rim or also on the thermal insulation as well?

[carsy]

The trumpet base thermal gasket you can get from ACT doesnt need anything on it as it is slightly soft so seals well when compressed. If yours is rubbery i doubt it needs anything else.

Plenum top to trumpet base i just use a bead of hylomer blue. Although any hi temp rtv sealant will do the job.

A lot of motors and mine was like this when i acquired it dont have any gasket underneath the trumpet base. Again just some hylomer blue can be used. Must admitt i havent noticed any difference after fitting an act thermal gasket.

Edited by carsy on Saturday 24th February 22:47

[jazzdude]

Thanks

Any tips in getting the hylomar onto the plenum without it going everywhere as you try to wrestle with the plenum in trying to get it back on?

I thought to just run a bead around the trumpet base and then lower the plenum onto it once I have successfully got it past the trumpets. Will that work?

[carsy]

Thats what i do.

This is where a blendid base makes things so much easier.

[jazzdude]