New Beetle L4-2.0L (BEV) (2004)
Lifter / Lash Adjuster: Testing and Inspection
Hydraulic lifters, checking
Special tools, equipment, testers, measuring instruments and auxiliary items required
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Feeler gauge
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Wooden or plastic wedge
Note:
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Replace faulty hydraulic lifters complete only (can not be adjusted or serviced).
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Irregular valve noises when starting engine are normal.
Work sequence
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Start engine and run until coolant fan has switched on once.
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Increase engine speed to about 2500 rpm for approximately 2 minutes.
If the hydraulic lifters are still noisy, locate faulty lifters as follows:
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Remove intake manifold upper part.
Note: Seal the intake ports in the intake manifold lower section with clean cloths.
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Remove cylinder head cover.
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Rotate crankshaft clockwise, until cam of lifter to be checked is pointing upward.
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Determine clearance between cam lobe and hydraulic lifter.
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If clearance is greater than 0.2 mm, replace hydraulic lifter. If clearance is less than 0.1 mm or no clearance exists, then proceed with check as
follows:
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Push hydraulic lifter down lightly with a wooden or plastic wedge. If when hydraulic lifter is pushed down a 0.2 mm thick feeler gauge can be
inserted between camshaft and hydraulic lifter, lifter is to be replaced.
Note: When new lifters have been installed the engine must not be started for about 30 minutes. The hydraulic compensation elements must settle
(otherwise valves will strike pistons).