Hydraulic Valve Lifter Assembly
NOTE:
Hydraulic valve lifters installed in this engine are not the same as used in gasoline engines.
If hydraulic valve lifters are being removed, mark or identify lifters to ensure that they are installed in original position. Lifters are serviced as complete assemblies only. Parts are not interchangeable between lifters. If lifter is damaged or worn, check cam mating surface for wear and if present, replace camshaft and lifters. Inspect lifter roller for missing or broken needle bearings. Roller should rotate freely, without excessive drag and should be free of pits and/or roughness.
NOTE:
A new hydraulic roller lifter is being used in which a guide fits over top of lifter to keep lifter from rotating, and a spring steel retainer fastened inside cylinder block holds guide in place.