Surge Tank Cap Test
WARNING: This page is about a different car, the 2005 Suzuki Reno and 2005 Suzuki Forenza. However, it is still accessible from the selected car via links, so may be relevant.
Tools Required
KM-471 Adapter
The surge tank cap maintains proper pressure, protects the system from high pressure by opening a pressure valve, and protects the coolant hoses from collapsing because of a vacuum.
- Wash any sludge from the surge tank cap and the valve seat of the vacuum pressure valve for the surge tank cap.
- Check for any damage or deformity to the vacuum pressure valve for the surge tank cap. If any damage or deformity is found, replace the cap.
- Install a suitable cooling system pressure tester to the cap using the adapter KM-471.
- Pull the vacuum pressure valve open. If the surge tank cap does not seal properly, replace the surge tank cap.
- Pressurize the cap to 90 to 120 kPa (13.1 to 17.4 psi).
- Wait 10 seconds and check the pressure held by the tank cap tester.
- If the pressure held by the cooling system pressure tester falls below 80 kPa (11.6 psi), replace the surge tank cap.