Thread: Breaking in rebuilt 454?

Tweet

I don't know the details of your cam and valve springs and don't have time to look them up, but if they are double or triple springs/dampers then running softer valve springs for the first start-up is commonly done, and is in fact a smart play. Typically the cam lobes and lifter faces are also lubed with moly lube for this purpose.

The main thing though is the prime before the intial start-up. Be sure to do that. While doing it turn the engine over a couple revolutions by hand, not the starter, while the drill is running.

Regards, Kitz

I just broke my cam in on my engine stand. See other post. It makes it so much easier. I primed mine as well with an old distributor housing machined down. I also had an oil press. gauge hooked up while I was priming it as well. The most imortant I feel is getting it to fire and keep it going for 20min at 2000 or so. Mine fired on the 1st revolution.
T.J.