Manifold to exhaust pipe

[enaberif]

Do our trucks use any gaskets where the manifold connects to the exhaust pipe?

I checked LMC but don't see anything.

[Prong]

They use an exhaust donut. You should be able to find 'em at your local parts store.

[enaberif]

Ok so I took at a look at the manifold has a rounded edge where it goes into the pipe and the pipe is flared where it sits against this round piece.

Do you still need a gasket.

[JohnC]

Yeah just like Prong said. It's a donut style gasket. It fits right where the circles are that you are looking at. It's not flat like other gaskets.

[enaberif]

So I need a gasket that fits over the rounded part on this manifold?

[JohnC]

Yeah where the manifold and exhaust pipe meet. Your local parts store will have them. Tell them what you need, and they'll fix you up.

[enaberif]

Originally Posted by JohnC

Yeah where the manifold and exhaust pipe meet. Your local parts store will have them. Tell them what you need, and they'll fix you up.

Yah I did and the donut fits fine into the pipe leading to the mufflers but not the manifold hrm.

[JohnC]

Hmmm. Mine have always fit pretty good. Maybe someone else will pop in and help out. Other than that I would say put it on the exhaust pipe where it fits, and then try and tighten it up. Sorry I can't help any more than that.

[enaberif]

Originally Posted by JohnC

Hmmm. Mine have always fit pretty good. Maybe someone else will pop in and help out. Other than that I would say put it on the exhaust pipe where it fits, and then try and tighten it up. Sorry I can't help any more than that.

Yah I figured it wouldn't be this difficult.. but then again.. I've had to fight with a few things.

I'll wait for other opinions.

thanks.

[westie 666]

Is your manifold a smaller size than your exhaust?

IE: 2 inch manifold and 3 inch exhaust pipe.

[enaberif]

Originally Posted by westie 666

Is your manifold a smaller size than your exhaust?

IE: 2 inch manifold and 3 inch exhaust pipe.

Other way around. The manifold is larger than the pipe.

Exhaust pipe is FLARED to fit over that rounded part. Which to me makes the seal but what happens when the truck is warm? And the pipe heats up? Would that not cause a air leak?

[westie 666]

OK now I'm confused, the donut type gasket fits inside the manifold and the exhaust pipe, you state the you have it over the manifold???

Unless your manifold is not the same as most of our trucks.

I think a pic or two may help.

[enaberif]

Originally Posted by westie 666

OK now I'm confused, the donut type gasket fits inside the manifold and the exhaust pipe, you state the you have it over the manifold???

Unless your manifold is not the same as most of our trucks.

I think a pic or two may help.

Best I can do without actually using a camera:

Manifold has a flange that is curved. This flange fits into the exhaust pipe which is flared. They are joined together by a 3 bolt bracket.

[westie 666]

With what you are trying to do, the external diameter of the manifold should match the internal diameter of the exhaust pipe so it fits inside and creates a seal. It's been so long since I have seen this type of set up I may have it wrong, your best bet is to take the truck to an exhaust shop, it may be a simple fix like a bigger or smaller donut.