New Beetle Turbo S L4-1.8L Turbo (AWP) (2002)
Lifter / Lash Adjuster: Testing and Inspection
Hydraulic valve lifters, checking
Special tools and equipment
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Feeler gauge
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Wooden or plastic wedge
Notes:
Replace complete valve lifters only (cannot be adjusted or repaired).
Irregular valve noise when starting engine is normal.
Test sequence
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Start engine and let run until radiator fan has switched on once.
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Increase engine speed to approximately 2500 RPM for 2 minutes.
If hydraulic valve lifters are still noisy, locate faulty valve lifter(s) as follows:
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Remove cylinder head cover.
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Turn crankshaft clockwise until camshaft lobe for valve lifter to be tested is pointing upwards.
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Measure play between camshaft lobe and valve lifter.
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If play is greater than 0.2 mm replace valve lifter. If minimal play of 0.1 mm or no play is measured, continue test as follows:
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Lightly press valve lifter downward with a wood or plastic wedge. If 0.20 mm thick feeler gauge can be inserted between camshaft and valve lifter,
replace valve lifter.
Note:
After installing new valve lifters, the engine may not be started for approx. 30 minutes. The hydraulic equalization elements must seat
themselves (otherwise the valves will crash into the pistons).