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PRE-RELEASE

Valve Spring Inspection and Measurement

Valve Spring Inspection and Measurement


Special Tools

EN 22738-B Valve Spring Tester

For equivalent regional tools, refer to Special Tools .

Inspection Procedure


1. Clean the valve springs in solvent.

2. Refer to Safety Glasses Warning .

Dry the valve springs with compressed air.

3. Inspect the valve springs for broken coils or coil ends.


Measurement Procedure


1. Measure the valve spring tension using the EN 22738-B tester. Refer to Engine Mechanical Specifications (LAU or LBW) .


2. If a low valve spring loading is observed, the valve springs must be replaced. Do not use a shim to increase the spring loading. The use of shims can cause the valve spring to bottom out before the camshaft lobe is at peak lift.


PRE-RELEASE