Hey guys,

I'm putting together an old '82 Camaro that I bought 2 years ago for extremely cheap. I had to remove the exhaust to replace/fix much of the engine. Now I'm reinstalling the exhaust onto the engine, and I've found a leak on the passenger-side exhaust manifold to pipe area.

Can anyone tell me the sequence this needs to be in? I have it going:

Exhaust manifold -> steel donut (beveled to fit into either the manifold or the exhaust pipe) -> really weird piece attached to a canister (the steel donut goes on top of it to protect a little round piece, also, a tube runs from this canister) -> exhaust pipe

I'm not the most car literate; does anyone have a diagram or a sequence in which I need to change? I'm also getting a leak between the pipe and manifold, and I want to rule out that the sequence is the problem. Can anyone help?

Thanks.

G

 

FYI, the donut is the EFE valve (also known as a heat riser). With a vehicle as old as yours, the butterfly inside is probably frozen open. As a consequence, you'd lose nothing by simply eliminating it.

JamesC

 

+1

 

As said above is it a vacuum operated heat riser. Probably siezed. Weld the butterfly in the open position. Sequence is manifold..flat gasket..heat riser..donut..Y pipe.

 

Well, I took the majority of it apart yesterday. The inside of the manifold is bevelled. I want to assume that the bevelled section of the butterfly valve slots into the bevelled area of the manifold. Next comes the donut which has its widest end protecting the butterfly, then the y pipe.

Sequence then being:

Exhaust Manifold -> Heat Riser (with butterfly partially inside the the donut, with bevelled area of heat riser inside the exhaust manifold) -> donut (protecting the butterfly) -> Y Pipe.

 

No....the manifold is bevelled because they use it on other applications. Install the flat side of the heatriser towards the manifold. MAKE SURE you install a flat, paper type of exhaust gasket between the two as the surfaces are now weathered and pitted. The bevelled part of the heat riser fits right into the y pipe....no gasket. Use some high heat rtv silicone on both sides of the flat gasket and on the flare of the y pipe to seal any imperfections in those surfaces.

 

There is a giant gap should I not use the donut. The donut IS large enough to cover most of the bevelled area of the heat riser. And yes, I am using high heat silicone for all necessary applications.

G

 

Oh yea...headers are verry cheap should problems persist.