Well, if you celebrate your successes you have to acknowledge your losses, too.
My XJ40 with the used replacement engine is back in, and you can see from my post yesterday that she started right up. That’s the success.
The loss. I have an oil leak. Emanating from the head gasket, at the back of the block. I’d hoped it was only the valve cover gasket which also had a leak, but after solving that issue, there is still a significant leak there. It’s not the half moons, it’s not the cover plate. It’s the head gasket.
The cause? I don’t know.
I used acetone to clean up the both surfaces before mating. I used spare blank bolts to line up the gasket. I cleaned and blew out the holes. I cleaned the bolt threads. I torqued to 45# plus 90 degrees.
I still have a oil leak and now it looks like I have to do the whole thing AGAIN?
I’m tempted to try to tighten an extra 90 degrees and see if that works but there is pretty much no chance it won’t keep leaking, is there?