Expedition 4WD V8-4.6L SOHC VIN 6 (1997)
Valve Spring: Specifications
DIMENSIONS
Valve Springs-Compression Pressure
Intake [1] ....................................................................................................................................................................... 633.3-701.3 N (142-158 lbs.)
Exhaust [1] ................................................................................................................................................................... 633.3-701.3 N (142-158 lbs.)
Valve Springs-Free Length (Approximate)
Intake ......................................................................................................................................................................................... 50.2 mm (1.976 inch)
Exhaust ...................................................................................................................................................................................... 50.2 mm (1.976 inch)
Valve Springs-Installed Pressure
Intake [2] ........................................................................................................................................................................... 272.1-306.1 N (61-69 lbs.)
Exhaust [2] ........................................................................................................................................................................ 272.1-306.1 N (61-69 lbs.)
Service Limit [1] .............................................................................................................................................................................. 3% Pressure Loss
Out of Square Limit ......................................................................................................................................................................................... 2.5 degrees
[1] @ 28.02 mm (1.103 inch)
[2] @ 40.0 mm (1.574 inch)
