T made a couple of pics of the mounting of the valve push rods and rocker boxes on the 1973 Harley Sportster Ironhead engine. As part of our Sportster engine rebuilding project we replaced all nuts and bolts on the Harley engine. For this purpose we got ourselves one of the very convenient complete sets that are made by Colony Machine.
First the refurbished cylinder heads were fixed to our Ironhead engine.
Here L is tightening the rear cylinder head bolts using a torque wrench which was set at the prescribed 65 ft-lbs torque. We got the Colony cap style bolts. Colony carry different styles as well, like acorn and pike for example.
Here L&T have installed the valve push rods and new oil lines onto the engine casing. We installed new push rod covers by Colony Machine.
Here the rear cylinder rocker arm cover box has been installed, with the valve push rods and oil lines connected.
Here L again handles the torque wrench to tighten the bolts on top of the rear rocker arm cover of our 1973 Ironhead engine. Recommended torque for these bolts is 20 ft-lbs.
And here she is. Push rods, oil lines and valve rocker arm covers in place, lookin' good!
This is how our 1973 Harley Sportster Ironhead motor looked like in May 2008, before overhauling. CLICK HERE for a closer view of this rustbucket.