Hydraulic Valve Lifter Assembly

Lifters are serviced as assemblies only and parts are not interchangeable. Always check rocker arm-to-valve stem clearance before concluding a noisy lifter is defective. After cleaning and reassembling lifters, they should be tested for leak down rate. Use lifter tester according to directions of manufacturer. Leak down rate is 5-50 seconds measured at 1/16" plunger travel under a 50 pound load.