920 heads - What Cam?
thanks for the info. does anyone have any specific brands/cams they suggest?
No matter the cam manufacturer, proper break in procedure is the critical component. Start with making sure the lifters rotate in there bore as you install them and then again when the heads are on and the pushrods installed with the rocker arms.
If there not rotating, STOP! Figure out why.
Then, with everything installed, grab a buddy and have him spin the drill with an oil pump priming shaft on it to send oil everywhere making sure there’s pressure everywhere. YOU will turn the engine over by hand to allow oil everywhere and up to the rockers. The oiling is timed so don’t panic when oil doesn’t instantly appear at the rockers. Turn the engine slowly.
Then line up the cam lobes, the bottom of the lifters, pushrod ends and rocker tips.
I like the “Isky” cam lube best because it sticks to the cam and stays there!
