Chasing Exhaust Leaks, This is maddening, so many issues. Options

[ctc911ctc]

All,

'74 914, 2L, original engine - about 20K miles

I started a new thread because the ones I could find did not address this issue. Perhaps it is me????

Last month I purchased new gaskets (thanks Mark @914R) and annealed them as per instructions. Used super glue to stick them in place. Mounted the heat exchanger/manifold and locked them in with around 20lbs of torque. Copper goo on the nuts, etc.

When I started the car it was the sound of my youth - smooth, strong,,,,,,ahh

After a few days the sound changed, using a rubber tube held to my ear I found exhaust leaks in the junction to the muffler (used new gaskets, alum sandwiched ones).

Here are the leaks

Copper Gasket Leaks



Seems as if the nuts were not tight enough. I made certain that the edge of the pipes were square and both on the same plane.

Questions as to the copper gaskets:

1. Seems that one was not seated concentrically with the pipe, that exhaust was leaking from day one - is there a method to square this or center it?

2. the other gasket it seems did not get seated at all, so it seems as if it was concentric just not tight enough?????

Now the aluminum Gaskets




I really tightened the bolts, I have ordered new gaskets and am brushing smooth the flanges which were both kind of cruddy, any advice as to installing these?


THANK YOU TEENERS!