940: Turbo Gaskets

[zdriver123]

Hey all,

It's been a while since I've played with a Volvo, and never with a Turbo. I'm just swapping a bad 13C with a good 13C and have a couple questions. I'm trying to find a manifold to Turbo gasket, and I would assume a downpipe gasket? I'm doing this for a friend, and am wanting everything to go smoothly. I tried looking on IPD and came up with nothing.

I'm guessing that's on me, Can anyone lend a hand?

[quillc]

The Volvo manifolds have that funky step in it. They don't use a gasket. Same thing on the outlet, it is just flanged.

[oldschoolvolvo]

You can use 8642450 for the turbo to manifold gasket.

No gasket is used on the conical turbo to downpipe connection.

[VB242]

My machinist recommended engine paint between the turbo and manifold, it seems to have helped.

[PhysSDK2]

Originally Posted by VB242

My machinist recommended engine paint between the turbo and manifold, it seems to have helped.

Hmm I’d be concerned about the O2 sensor depending on the paint. I think ceramic paint there would foul the sensor. I guess you could run a bad one for some break in then put a good one back in.

[thismachine13]

Went to Hobby Lobby and bought a small piece of copper (4”x6”?) for $7 and made my own.

[VB242]

Originally Posted by PhysSDK2

Hmm I’d be concerned about the O2 sensor depending on the paint. I think ceramic paint there would foul the sensor. I guess you could run a bad one for some break in then put a good one back in.

I waited for it to dry, did not affect my wideband.

[woodenpudden]

Originally Posted by quillc

The Volvo manifolds have that funky step in it. They don't use a gasket. Same thing on the outlet, it is just flanged.

Correct.

Originally Posted by oldschoolvolvo

You can use 8642450 for the turbo to manifold gasket.

No gasket is used on the conical turbo to downpipe connection.

Adding a gasket between turbo and stepped manifold outlet can cause a wee exhaust leak.

Originally Posted by VB242

My machinist recommended engine paint between the turbo and manifold, it seems to have helped.

Helped with what? Stock turbo + stock/unaltered manifold + tight nutz should result in an adequate seal.

[oldschoolvolvo]

Originally Posted by woodenpudden

Adding a gasket between turbo and stepped manifold outlet can cause a wee exhaust leak.

I haven't had issues using the 8642450 gasket with a 13C and a 16T on a 90+ manifold. FWIW, it is spec'd for the 5cyl manifolds with the step.
https://www.fcpeuro.com/products/vol...642450#fitment

[woodenpudden]

Originally Posted by oldschoolvolvo

I haven't had issues using the 8642450 gasket with a 13C and a 16T on a 90+ manifold. FWIW, it is spec'd for the 5cyl manifolds with the step.
https://www.fcpeuro.com/products/vol...642450#fitment

I can dig it, didn't look up the part number before to see

[Jack]

Originally Posted by oldschoolvolvo

I haven't had issues using the 8642450 gasket with a 13C and a 16T on a 90+ manifold. FWIW, it is spec'd for the 5cyl manifolds with the step.
https://www.fcpeuro.com/products/vol...642450#fitment

Thats what I run on 5 and 4 cylinders

[VB242]

Originally Posted by woodenpudden

Correct.



Adding a gasket between turbo and stepped manifold outlet can cause a wee exhaust leak.



Helped with what? Stock turbo + stock/unaltered manifold + tight nutz should result in an adequate seal.

Mine is machined flat for Chinese turbo with a metal gasket in between, it helped with minor weep/leak.