Rocker arm/lifter break in?

[Harlow]

Is there any kind of break in procedure for lifters and/or rocker arms?

[Musicman]

Assuming that you have replaced the cam, you would run the engine for about 10 minutes at a varied rate of 1500 - 3000 rpm's. This is done to encourage the lifters to spin in their respective bores. There is a slight taper ground into the cam lobe and the lifter bottom to make the lifter spin during operation, thus preventing them from wearing in one specific area. If they do not spin, they will fail. Varying the rpm during break-in gives the lifter a greater chance of spinning. Obviously, none of this applies to roller cams.

Of course... firefighter3931 may have something to add here... he knows a lot more about this subject than most of us.

Mike

[firefighter3931]

  That's pretty much it allthough i like to run them in longer....20 minutes at 2000 rpm. Use a good oil like Rotella 15-40 with a bottle of GM EOS and lube the lifter faces with moly paste.


Ron