Valve Spring: Testing and Inspection

NOTE: Inspect the valve springs for evidence of weakness or distortion. Replace as necessary.

^ Tools Required:
- J 26900-5 Vernier Caliper
- J 22738-2 Valve Spring Tester
- Or Equivalents





FREE LENGTH
Each valve spring free length using a vernier caliper. Standard free length is 36.83 mm (1.4500 inch). If valve spring free length is less than 35.67 mm (1.4043 inch), replace the valve spring.

VALVE SPRING PRELOAD
Using a J 22738-2, measure valve spring preload. Standard preload is 10.7 to 12.5 kg at 31.5 mm (23.6 to 27.5 lbs. at 1.24 inch).





VALVE SPRING SQUARENESS
Valve spring squareness, using a square and surface plate, to check each valve spring for squareness in terms of clearance between end of valve spring and square. Valve springs with a side clearance larger than 2.0 mm (0.079 inch) must be replaced.