ISX CAM BEARING FAILURE ISX Cummins DOHC heads are often return with an injector cam bearing seized to the camshaft. The cause is twofold: 1) When the technician removed the camshaft on the head exchange, they stood the camshaft on end. Since the camshafts are hollow,...
COMBUSTION CHAMBER VOLUME SOLUTION Measuring combustion chamber volume is an important step when trying to achieve a specific compression ratio in a custom engine build. CNC machining the chambers or even sinking the valve job will increase the chamber size by a...
BIG D HEAD HANDLE Diesel cylinder heads are heavy and can be dangerous to move around. I use a rocker arm shaft and bolts from a Detroit to make a handle for carrying Detroit heads around the shop. It helps keep my fingers in working condition and keeps the head in...
MYSTERY OIL CONSUMPTION Sometimes we get engines in the shop that have unexplained oil consumption. The rings, valve guides and seals all appear to be just fine. Valve guide replacement, spring cup modifications, heavy porting and machining rocker arm bosses are just...
SIMPLE BUT EFFECTIVE If you have to bleed down bucket style lifters you can make a easy to use tool from an old junk valve. Just cut the stem off leaving an inch or so above the face of the valve. Dress the end up in the grinder and you have a free tool that takes...
BMW UNDER PRESSURE One of the most difficult heads to pressure test is the BMW DOHC 6 cylinder. It is nearly impossible to plug the water outlet on the side of the head, until now. A “T handle drain plug” from a boat is the perfect size, and easy to install and...