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Ford Truck
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1999
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Econoline E250 3/4 Ton V8-5.4L CNG VIN M
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Repair and Diagnosis
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Engine, Cooling and Exhaust
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Engine
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Service and Repair
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General Procedures
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Valvetrain Components
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Valve Spring
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Valve Spring Strength
Valve Spring Strength
Special Tools:
1.
Use a Valve/Clutch Spring Tester to check the
valve spring
for proper strength at the specified valve spring length.
^
If out of specification, replace as necessary.