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Fuel Filler Cap: Testing and Inspection
Fuel Tank Vacuum Relief Valve (Built into fuel filler cap)
1. Wipe clean valve housing.
2. Check valve opening pressure and vacuum.
Pressure:
15.3 - 20.0 kPa (0.156 - 0.204 kg/Sq cm, 2.22 - 2.90 psi)
Vacuum:
-6.0 to -3.3 kPa (-0.061 to -0.034 kg/Sq cm, -0.87 to -0.48 psi)
3. If out of specification, replace fuel filler cap as an assembly.
CAUTION: Use only a genuine fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the MIL may come on.