Thread: adjusting rockers

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Originally Posted by Sinister

Here's some ideas,

First: there are little clips you can buy at the autoparts that will clip on the rocker arms and plug the oil hole, allowing you to adj. rocker arms without spraying oil everywhere.

Second: The way I have always adj. hydraulic lifters is ; bring the cylinder to TDC on compression stroke,{both lifters should now be on the base circle of the cam}, tighten down the rocker while turning the pushrod between thumb and forefinger until you start to feel drag. Then go 1/2 turn past that and you're done. Move to the next cylinder and repeat.

I've only built a few engines, but it has always worked fine for me.

Just my 2 cents

If you go another half a turn past feeling drag then you have exceeded the .020 to .060 pre-load.

Hey Erik, let me get your thoughts on this.

I have read in the Crane cams catalog that if you soak your hyd. lifters in oil, the way a lot of people do, they will act like a solid lifter while trying to adj. them,thus not getting the preload you should. That's why I do the extra half turn.I'm not saying this is the only way it should be done, just my theory on it,

Keep in mind I only have a few builds under my belt.

I would appreciate if you or anyone else would get back to me on this!

Originally Posted by Sinister

Hey Erik, let me get your thoughts on this.

I have read in the Crane cams catalog that if you soak your hyd. lifters in oil, the way a lot of people do, they will act like a solid lifter while trying to adj. them,thus not getting the preload you should. That's why I do the extra half turn.I'm not saying this is the only way it should be done, just my theory on it,

Keep in mind I only have a few builds under my belt.

I would appreciate if you or anyone else would get back to me on this!

I guess it also depends on what you call "drag".
The main thing is not make sure you have .020 to .060 pre-load.
I.M.O. it is much better to have it a little on the loose side than tight side.