Valve Spring: Testing and Inspection
INSPECTION AND REPAIRValve Spring
CAUTION: Visually inspect the valve springs and replace them if damage or abnormal wear is evident.
1. Measure the free height of the springs. The springs must be replaced if the free height is below the specified limit.
Standard: 44.6 mm (1.756 inch)
Limit: 43.6 mm (1.717 inch)
2. Measure the valve spring squareness with a steel square and replace the valve springs if the measured value exceeds the specified limit.
Limit: 2 mm (0.079 inch)
3. Using a spring tester to compress the springs to the installed height, measure the compressed spring tension, and replace the springs if the measured tension is below the specified limit.
At installed height: 35.0 mm (1.38 inch)
Standard: 196 N (44 lbs.)
Limit: Less than 181 N (41 lbs.)