Jetta L4-2.0L (AEG) (2000)
Lifter / Lash Adjuster: Testing and Inspection
Hydraulic Lifters, Checking
Special tools
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Feeler gauge
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Wooden or plastic wedge
Note:
- Replace faulty lifter complete (cannot be adjusted or repaired).
- Irregular valve sounds during engine starting are normal.
Test sequence
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Start engine and run until radiator fan has switched on once.
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Increase engine speed to about 2500 rpm for approx. 2 min.
If lifter(s) are still noisy, locate faulty lifter(s) as follows:
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Remove intake manifold upper part:
Note:
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Seal the open portions of the lower intake manifold against dirt etc. with clean shop rags.
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Remove valve cover.
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Rotate crankshaft clockwise, until cam lobe of lifter to be checked is pointing upward.
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Push hydraulic lifter down lightly with a wooden or plastic wedge. If, when pushed down, a 0.2 mm thick feeler gauge can be pushed between the
camshaft and lifter, replace that lifter.
Note:
- DO NOT start the engine for approx. 30 minutes after installing new lifters. Hydraulic compensation elements in the lifters must settle, otherwise the
valves will strike the pistons.