valvetrain · FF-0398

Can ARDUN push rods be installed after the rocker stands are on?

No. The cup on the push rod is about 145 thousandths deep and the push rods are made only 100 thousandths short, so the cup cannot come out from under the adjusting ball. The push rods go in first, then the rocker stands are tightened down very carefully and slowly, because some valves are being pushed open against their springs as you go. Steve says a company called Smith Brothers in Bend, Oregon makes the push rods for Don Ferguson's engines.

Expert

Steve Coppock

Evidence

expert attributed

Component

push rod installation

Applicable scope

Ford Flathead V8 with Don Ferguson reproduction ARDUN heads