My 73 240 is in need of rings, right away! The only ones we can find are cast iron and there is no way I'm putting that in there! Datsun/Nissan no longer makes the rings to fit this car and aftermarket can't get here til tuesday. Any suggestions?

Thanks,

TraeZ

What kind of rings are you wanting to put in if not cast iron? Chrome?

Yes, I was told that the cast iron ones would eventually cause me to blow a piston and have to redo the enitre overhaul! Is there different info?

I'm pretty certain that the car came with cast iron from the factory. Few engines come originally with chrome from the factory, the only one I can think of off hand is the old Pontiac 455. Chrome rings are harder than cast iron and will last longer but can be a bear to seat. I've heard of cases where chrome rings never seated.

I would go with the cast iron, that's probably what you would have gotten from the dealer if he still stocked them. Properly fitted they should give you good long service.

Lance, thanks for the info, we did go with the cast iron ones and it runs like a stallion! I left it in Tulsa for now since it has a new engine and needs that break in time at lower, slower speeds!

Can't wait to bring her home and pamper her here!!