New cam break in?

[nuhmizer]

When you install a new cam and lifters, is there a break in period where you have to run the engine for a certin amount of time? If so, what happens if you dont do it?

 

[CorkyE]

Rollers don't really require a break in. Flat's are supposed to have a 20 min break in. The supposed consequences of not doing a proper break in is wiping the lobes or ruining lifters. I'm sure some have gotten away without a proper break in, but I prefer to follow the "rules" on flat tappets. This issue has been hashed and thrashed, do a search and you'll find some pretty good reading.

 

[Ztoy]

I would find out what the manufacturer says.

 

[hhott71]

I would find out what the manufacturer says.

When all else fails,,,,,read the instructions.

 

[Ztoy]

When all else fails,,,,,read the instructions.

fur sure

 

[nuhmizer]

When all else fails,,,,,read the instructions.

I bought the engine from someone else. I didn't ask him if he had broke in the cam.

 

[brick_haus]

20 min. at 2000rpm, in nuetral, when you first start the engine after installation of new cam.

 

[78LT383]

Make sure you get the GM oil additive or use Rotella oil (if you're working with a flat tappet cam/lifters) since they no longer put the zinc or other useful additives in standard oil. It's a good idea to use the Rotella after break-in, but these days it's just about critical.