300SEL (126.025) L6-3.0L (103.981) (1988)
Lifter / Lash Adjuster: Service and Repair
Checking and replacing hydraulic valve clearance compensating elements
Preceding work:
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Warm engine up to operating temperature (80 °C)
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Cylinder head cover removed.
Checking (compensating element installed)
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Rotate crankshaft and position cam of compensating element (58) to be checked to base circle.
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Apply load to hydraulic compensating element (58) with handle of hammer or similar for approx. 5 - 10 seconds (arrow).
Caution! Do not press valves against piston when testing pressure. If compensating element (58) drops, there is a leak on the inside and it must
be replaced. Remove relevant camshaft bearing cap.
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If compensating element (58) does not drop, check play between compensating element (58) and rocker arm (51) by hand.
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If play exists between hard compensating element (58) and rocker arm (51), check basic position of compensating element.
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Remove camshaft bearing cap.
Checking (compensating element removed)