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RAJO head gasket questions

Posted: Sat Sep 27, 2025 1:19 pm
by Reno Speedster
I am preparing to install my original RAJO BB head. I had planned to use a copper head gasket and I ordered one from a supplier. But what came was a copper composite gasket rather than a sold copper one. My questions are:

1) are solid copper Rajo head gaskets available and from whom?
2) if they are, is it worth getting one, or is the composite one good?

Let me know your experience.

Re: RAJO head gasket questions

Posted: Sat Sep 27, 2025 1:24 pm
by RajoRacer
No solid copper for a RAJO O.H. that I'm aware of - I'm running the copper composite on my BB. I did have stock T solid copper head gaskets made for my '19 Centerdoor with rather large intake valves - off the shelf coppers had interference issues !

Re: RAJO head gasket questions

Posted: Sat Sep 27, 2025 2:08 pm
by Dan McEachern
Run the composite gasket- sealing a solid copper head gasket on a T motor is problematic due to the lack of sufficient head bolts to develop sufficient clamp pressure. The composite gaskets are pretty much trouble free. Coating them with white grease before installation works well. Spraying them with Copper Coat works well also, but you will destroy the gasket upon removal. %0 ft-lbs is enough torque. Retorque and reset valve lash after getting it hot for the 1st time.