Well, after 32 years on the original engine, the head gasket blew between cylinders 3 and 4 causing loud knocking under load. I nursed it home using high rpm/low torque to not put any stress on the engine, which worked well.
You know, this truck has NEVER, not one single time, left me stranded in all those years. This was no exception. It got me home.
Anyway, time to finally change the gasket. This engine was NEVER overheated or ran hot. So it's probably fine. Yes, I may have been remiss on re-tightening the head bolts lately.
I did look but can't find the discussion on what head gasket to get for my Z24. I "think" it was mentioned to only use Nissan original but I wanted to float the question again regardless.
Also..... while I have a wedge in there and the head off, would it make any sense to put in head studs instead? And does anyone make them?