Valve Spring Inspection and Measurement

/ 9-4x / 2011 / 2. Engine / Basic engine, V6 / Adjustment/replacement / 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 valve spring tension with tester EN 22738-B . See Mechanical specifications, engine (LF1) Mechanical specifications, engine (LAU or LBW) .

2.	If low valve spring load is found, replace the valve springs. DO NOT use shims to increase spring load. The use of shims can cause the valve spring to bottom out before the camshaft lobe is at peak lift.

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