W2 heads I think they are ready

Duane said

Ok yellow rose can you clarify for me about pushrod length.
I have always followed the old Mopar engine book for optimal pushrod length. But I always thought it was for optimal geometry.
You guys are saying that it was to make sure that those oiling hole line up properly and Pittsburg racer is saying the banana grooves help with this alignment, correct?

Click to expand...

I’m saying that the adjuster length not only affects the geometry some, BUT...the big deal is the location of the pushrod cup relative to the oil feed hole in the rocker.

In theory, the oil squirting out of the rocker should hit the adjuster just above the ball, where the adjuster is undercut.

This allows the oil to run down the adjuster and fill the cup while there is lash in the system. If the pushrod is too short, the oil hits the threaded portion of the adjuster and never gets to the cup.

It looks like a very haphazard way to oil the adjusters and pushrods but when it is right, it oils everything and does it well. As I’ve said before, that’s one reason to run a HV oil pump and keep the idle oil pressure at 45ish or more. I want oil at the rocker and adjusters at idle. Believe it or not, that’s when most adjusters get smoked...at idle. At WOT or even at cruise, there is enough oil flowing up to the rockers that most anything will oil just due to the oil fog in the valve covers. The correct way to do it is outlined above.