2001-Current 6.6L GM Duramax Rocker Arm Shafts
With the increasing number of people reporting lifter and camshaft issues, we felt it was time to find the culprit and fix it. We followed the oil supply chain and it pointed directly to the rocker arm shaft for being the source of these issues. Our Duramax shafts feature a new type of radial oil transfer passage which provides full time oiling to the roller lifters via the adjusting screw and pushrod. Without this new oiling feature, the stock oiling passage in the shaft is shut off as soon as the rocker arm starts to open the valve. This can be seen when the lifters are taken apart; The bushings will be discolored from excessive heat. In effect, any oil that reaches the bushing at this time is being overheated, contaminating the oil supply with damaged oil. All of our rocker arm shafts use a threaded plug to seal each end, eliminating any chance of an oil pressure loss from worn or poor fitted press plugs. With valve train stability being of additional concern, we manufacture our shafts to be very stiff to provide additional support to the aluminum head. Our choice of material is .250′ wall thickness 4130 chromoly steel tubing. Each pre-heat-treated shaft is CNC machined in a four-axis milling center before being hard chromed and ground. We leave a hard chromed surface providing excellent wear protection in any application, including use in your daily driven Duramax. All in all, this shaft was engineered to provide a cost-effective solution for increasing service life and performance of the valve train system. Includes : (2) .250 Wall thickness Rocker arm Shaft.
If you require additional assistance, please call (951)245-6565