Hi-
When I had the engine rebuilt on my TR6, the mechanic used these brass
colored nuts to fasten the manifold. I actually dont know their composition
but they have the property of not seizing on the studs which is pretty cool.
What is not cool is I cannot keep them tight. The problem seems to be that
no matter what kind of lock washer I use, the heat seems to fatigue the
metal where the lock washer looses all of its spring and just becomes
flat.
I am about to replace the manifold gasket one again and this time I want
to remedy this. Does the manifold actually depend on the nut seizing to some
degree or is my problem really different coefficients of thermal expansion
between the different materials? Does anyone know if a lock washer I can get
that will hold up or should I just go back to a steel nut. Oh, has anyone
tried stainless nuts?
Thanks for any advice. Here is a picture of my car if you are interested.
Regards,
Steve
74 TR6
http://www.veroquest.com/TR6/images/DSCF0009.JPG
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