SL 500 (129.067) V8-5.0L (119.982) (1996)
Valve Spring: Testing and Inspection
Preparation
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Valve springs removed (05-2500)
Overview
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Clean valve springs.
CAUTION: Replace valve springs which are not to dimensional tolerance, are corroded, have surface rust, mechanical damage or worn at the ends.
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Check, match color coding on valve springs, see table below.
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Measure spring force at pretensioned length.
If the valve springs do not achieve the specified spring force, they cause a loss of frictional connection at high engine speeds and should be
replaced.
Valve Spring Dimensions