Valve Spring: Testing and Inspection

TOOL REQUIRED
- J 26900-5 Dial Caliper
- J 26900-2 Outside Micrometer
- J 22738-2 Valve Spring Tester

MEASURE




1. Each valve spring free length using a J 26900-5 and J 26900-2. Standard free length is 49.0 mm (1.9409 inches) with a minimum free length of 48.1 (1.8937 inches).





2. Using a J 22738-2, measure preload. Standard preload is 24.8 to 29.2 kg at 41.5 mm (54.7 to 64.3 lbs. at 1.63 inches), with a limit of 22.8 kg at 41.5 mm (54.7 to 64.3 lbs. at 1.63 inches).





3. 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 clearance larger than 2.0 mm (0.079 inch) must be replaced.