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Harley Rocker Boxes and Push Rods

Life's a bitch...   Thank God there's Harleys...

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.

Photo of Colony Machine Show Bike Kit - Cap Style (Stock no. 8502 Sportster 1971-1973) for our 1973 Ironhead engine - by Harley Oldschool Bobber. For your easy reference, the set that we got is: Complete Motor Kit - Show Bike Kit - Cap Style - Stock no. 8502 Sportster 1971-1973



Ironhead Cylinder Heads

First the refurbished cylinder heads were fixed to our Ironhead engine.

Photo of mounting of cast iron cylinder head on our 1973 Ironhead engine using a torque wrench - by Harley Oldschool Bobber. 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.


Photo of our 1973 Ironhead engine - by Harley Oldschool Bobber. Both cast iron cylinder heads mounted on top of the cylinders. If you push your eyes to almost closed, and use a bit of imagination, this looks a little bit like a Harley Flathead engine...



Ironhead Engine Push Rods and Oil Lines

Photo of valve push rods and new oil lines mounted onto the engine casing of our 1973 Ironhead engine - by Harley Oldschool Bobber. 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.

Colony parts used:



Ironhead Engine Rocker Arm Covers

Photo of ear cylinder rocker arm cover box on our 1973 Ironhead engine - by Harley Oldschool Bobber. Here the rear cylinder rocker arm cover box has been installed, with the valve push rods and oil lines connected.


Photo of tightening of the bolts on top of rear rocker arm cover of our 1973 Ironhead engine - by Harley Oldschool Bobber. 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.


Photo of our 1973 Ironhead engine with push rods, oil lines and valve rocker arm covers in place - by Harley Oldschool Bobber. And here she is. Push rods, oil lines and valve rocker arm covers in place, lookin' good!


Just for reference, this is how she looked one year ago:

BEFORE Cleaning and Rebuilding (May 2008)

Photo of 1973 Ironhead engine before cleaning and rebuilding - by Harley Oldschool Bobber. 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.



May 2009