Service Gauge Port Valves
WARNING: This page is about a different car, the 2015 Lincoln MKS. However, it is still accessible from the selected car via links, so may be relevant.
The service gauge port valve is an integral part of the refrigerant line or component.
- Prior to leak testing, blow air over the service gauge port valves to ensure an accurate test.
- Special couplings are required for both the high-side and low-side service gauge ports.
- A very small amount of leakage around the Schrader-type valve with the service gauge port valve cap removed is considered normal. Install a new Schrader-type valve core if the seal leaks excessively.
- The A/C service gauge port valve caps are used as primary seals in the refrigerant system to prevent leakage through the Schrader-type valves from reaching the atmosphere. Always install and tighten the A/C service gauge port valve caps to the correct torque after they are removed.
- Follow the procedure and the notes for electronic leak testing. Refer to Electronic Leak Detection .
| Item | Description | Torque |
|---|---|---|
| 1 | Low-pressure service gauge port valve cap | 0.8 Nm (7 lb-in) |
| 2 | Low-pressure service gauge port valve | - |
| 3 | Low-pressure Schrader-type valve | 1.8 Nm (16 lb-in) |
| 4 | High-pressure Schrader-type valve | 2.5 Nm (22 lb-in) |
| 5 | High-pressure service gauge port valve | - |
| 6 | High-pressure service gauge port valve cap | 0.8 Nm (7 lb-in) |