Hydraulic Lifters, Checking: Procedure

WARNING: This page is about a different variant/trim than selected.

-- Start the engine and let it run until the radiator fan switches on once.

-- Increase engine speed for about 2 minutes to approximately 2500 RPM, perform road test if necessary.

NOTE:

If irregular valve noises disappear but return during short drives, replace the oil check valve. The oil check valve is installed inside the oil filter housing -item 9) OVERVIEW - OIL FILTER HOUSING/OIL PRESSURE SWITCH -.

-- If the hydraulic lifters are still loud, determine which lifter is faulty as follows:

-- Remove the cylinder head cover. Refer to CYLINDER HEAD COVER, REMOVING AND INSTALLING .

-- Turn the crankshaft by the toothed belt sprocket bolt until the cam lobes on the lifter that must be checked are at the top.

-- To determine the play between cam lobes and roller rocker lever, press the lever downward in direction of -arrow-.

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- If a 0.20 mm feeler gauge can slide between the cam lobes and roller rocker lever, replace the hydraulic lifter. Refer to CAMSHAFT HOUSING, REMOVING AND INSTALLING .

Final Procedures

-- Install the cylinder head cover. Refer to CYLINDER HEAD COVER, REMOVING AND INSTALLING .