924Board.org

[-nick]

Can anyone tell me the gasket setup for the exhaust and turbo parts?

PET shows a metal ring gasket between the front and rear exhaust halves. I have a large flat square gasket here that was stock. It also shows a large metal gasket between the turbo and the exhaust pipe.

It seems to me that this is backwards- the exhaust halves get the flat metal gasket and the turbo-to-exhaust gets the ring.

This is for the latest configuration per the tech bulletin: http://www.924.org/techsection/931_turbo.htm

FYI- I bought a replacement wastegate metal ring that goes between the cat and the pipe out to the wastegate. The ring is much too large but it is the correct part number. Barring a packaging error, this may be another instance of PET error.

thanks
-nick

[CMXXXI]

You will have to physically look at your system components. Use the rings and not the flat gaskets if your turbo has the "insets" you see in the below photo.
(Click on picture for larger image)

See the ridges on both the turbine side flanges? The sealing ring goes into the recesses machined/cast in the flanges. Same story with the mating surface on the exhast manifold-->J-tube. If there is this "recess" in the manifold where the J-tube mates up, use the ring. The only place I used flat gaskets was J-tube-->wastegate and wastegate-->exhaust pipe. (Still have the flat gaskets, anybody want to buy them??)

Although the tech section says what it does about model years, etc, I have a very early production '79 and it has the late style mating surfaces.
_________________
'79 Eurospec 931