AFM DELETE THE RIGHT WAY When performing a performance camshaft upgrade on a LS engine that is originally equipped with the Active Fuel Management system (AKA: AFM or DOD) it is advised to remove the AFM solenoid assembly from the engine and convert the engine to a...

ROD TO CAM CLEARANCE GAUGE Using a plastic banding strap as a feeler gauge works great to check for clearance. The straps are generally .035-.045” thick, so you might want to double them up to check for the minimal .050-.060” clearance recommended. They work great as...

MAKING THE SEAL ON WET HEADBOLTS & STUDS 40 to 50% of our business is hi-performance boat engines, and the head bolt/stud sealing is critical on these engines. Jet boats use “waste” water from the jet pump to cool the engine and the pressure applied to the water...

The Importance of Timing Sprocket Alignment When assembling an engine, one of the most overlooked items is the timing chain sprocket alignment. The upper and lower gears should be installed and alignment checked with a straight edge. I have seen them as far as .020 ̋...

GM LS-Series Double-Roller Chain Oil Pump Spacer Warning If you are using a spacer to reposition the oil pump forward in a Chevy LS engine so that a double-roller chain can be installed to drive the camshaft, use caution to make sure the pump has sufficient end play...

Easy Oil Pump Screen Install I just clamp the screen in my brass jaw vise and use a plastic dead-blow hammer to drive the pump onto the screen, being careful to keep them in alignment. This method started when I did not have a driver for an oddball engine. Now I do...