disaster strikes?, valves too tight? Options

[mattp]

I did my initial start up of my new raby engine, two of the cylinders had valves that were too tight causeing blow back throught the carbs. Adjusted valves and cant seem to make them any looser? any ideas?
also major oil leak from somewhere where engine meets transmission, thinking rear main seal??

[Jake Raby]

Matt's rocker geometry was completed by us during his extensive prep. It is correct.

Why can't you "make the valve looser"?? What is stopping you from the adjustment?

It sounds like you are adjusting the valves at the wrong position,
or I'd bet that the pushrods are not seated in the lifters correctly. You must use a flashlight to verify that each pushrod is seated in the lifter "cup" and isn't seating around that cup taking away 1/4" of valve adjustment. If this occurs bent valves are the norm from colliding with the pistons.

Yes, if you have oil leaking at the tranny/engine then you either have made a goof installing the rear seal, or flywheel O ring or you have a galley plug leaking.

Welcome to the world of engine building. We guaranteed you that it would be a challenge! BUT you do have support, it may be July 4th and I may be at home, but you can still call me.