ford Workshop Repair Guides

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Valve Spring|Testing and Inspection > < Mechanical Specifications
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Valve Spring: Pressure, Vacuum and Temperature Specifications

NOTE:  Specifications are for intake and exhaust unless noted.

Compression Pressure @ Height

587.14 N (131.989 lbs.) ...............................................................................................................................................................  28.02 mm (1.1031 inch)
244.64 N (54.995 lbs.) ...................................................................................................................................................................  40.0 mm (1.5748 inch)

Service Limit

Pressure Loss @ Specified Height

10% ........................................................................................................................................................................................  28.02 mm (1.1031 inch)

Valve Spring|Testing and Inspection > < Mechanical Specifications