Feuling’s Twin Cam Rocker Shafts Installed

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Feuling Parts’ Twin Cam Rocker Shafts were designed with strength in mind. With over double the strength of the factory shafts, the Feuling rocker shafts are precision ground from 4140HT steel, gas nitrited and final surface treated. The Feuling race crew learned the hard way that the factory rocker shafts weren’t cutting it for their bagger racing efforts. The Feuling crew decided to source the best possible material and heat treat process available to create the best rocker shaft on the market. They recommended the upgrade for all Twin Cam engines and (Milwaukee-Eight engines too) especially for engines running higher lift camshafts and heavier valve spring pressures. Take a step-by-step look at how to swap out the factory rocker shafts for a much more stout set from Feuling Parts. 

 

Feuling recommends using ARP rocker support bolts, P/N 1236 and P/N 1237.

First thing’s first. Refer to your factory service manual for your model’s specific engine type. Then, wash, clean and inspect all new Feuling hardware.

 

Start the installation with fully pumped up lifters, see oil squirt can (P/N 9005). Check the rocker arm to support side clearance.

 

Rocker arm to support side clearance: Feuling recommends an ideal side clearance of 0.0025”-0.0055”. Factory calls out 0.003”-0.013”. NOTE: Larger clearances produce lower oil pressure and more noise.

 

Rotate the working cylinder to TDCC. Install the pushrods and pump up with an oil squirt can. Also generously lube valve tips and pushrod tips.

 

Install rocker arms into rocker arm supports. Slide shafts through support and rocker arms. Apply red Loctite to support bolt threads and moly lube to the underhead flanges. Then pump up the rocker arms. NOTE: Warped rocker supports will cause difficulty installing shafts. Excessively warped supports should be replaced.

 

Tighten and torque the rocker shafts’ support bolts–Final torque to 18-22 ft/lbs.





Source : Hotbikeweb