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.