Ranger 2WD V6-245 4.0L VIN X SFI (1997)
Compressor Fitting HVAC: Testing and Inspection
A/C MANIFOLD AND TUBE LEAK TEST
1. Tighten the manifold retaining bolt to 17-23 Nm (12-17 lb-ft).
2. Add refrigerant to the system if necessary.
3. Leak test the manifold O-ring seals using Rotunda R-134a Automatic Calibration Halogen Leak Detector or equivalent.
4. If no leaks are found, the manifold O-ring seals are good.
5. If a leak is found at the manifold and the manifold attaching bolt is tightened to 18-23 Nm (13-17 lb-ft), install new manifold O-ring seals. Then,
repeat the leak test.
