Abstract: A self-adjusting pushrod length checking tool for use in an internal combustion engine between the camshaft lifter and valve rocker arm, that determines the optimum pushrod length using a telescoping spring-loaded body upper rod and a lower rod assembly. The spring-loaded telescoping assembly self-adjusts and determines the optimum pushrod length when compressed and inserted between the camshaft and valve rocker arm, when the rocker arm pivot bolt is fully tightened down to the cylinder head. The telescoping assembly sections are then locked by a captive set screw, the assembly is removed from the engine, and accurate measurements of the assembly length are taken.

Abstract: A self-adjusting pushrod length checking tool for use in an internal combustion engine between the camshaft lifter and valve rocker arm, that determines the optimum pushrod length using a telescoping spring-loaded body upper rod and a lower rod assembly. The spring-loaded telescoping assembly self-adjusts and determines the optimum pushrod length when compressed and inserted between the camshaft and valve rocker arm, when the rocker arm pivot bolt is fully tightened down to the cylinder head. The telescoping assembly sections are then locked by a captive set screw, the assembly is removed from the engine, and accurate measurements of the assembly length are taken.

Abstract: A camshaft variable timing unlocking device for mounting to a camshaft variable timing mechanism which has internal passages in which compressed air is introduced to unlock a spring loaded lock pin. The camshaft variable timing device is than rotated counterclockwise/retard by mechanical means to any position relative to the crankshaft centerline. Accurate piston to valve clearance of both intake and exhaust valves can be checked and verified for racing and/or other high performance applications. The camshaft variable timing mechanism can be unlocked without any damage to the internal spring loaded lock pin mechanism allowing it to be reused.