Leak Testing: Notes
WARNING: This page is about a different car, the 2003 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
Perform a refrigerant leak test on the system if you suspect a leak because of the following conditions:
- A system indication of a low charge
- A service operation which disturbed the following items:
- Components
- Tubes
- Connections
Before beginning the leak test, ensure that the refrigerant system has a sufficient charge. Measure the static pressure by using a gauge set. The system must have a pressure above 345 kPa (50 psi) for an acceptable leak test.
Most leaks occur at the refrigerant fittings or at the connections. Leaks may result from the following conditions:
- Incorrect torque
- Damaged O-rings
- Lack of lubricant on the O-rings
- Dirt or debris across an O-ring
The smallest piece of lint from the following items may create a leak path along an O-ring:
- Cotton gloves
- Shop cloths