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.