Pinpoint Test A : Pinpoint Test Loss Of Coolant: Notes
WARNING: This page is about a different car, the 2018 Ford F-550 Super Duty, 2018 Ford F-450 Super Duty, 2018 Ford F-350 Super Duty, and 2018 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
Normal operation and Fault Conditions
The secondary cooling system is a closed system that provides for coolant expansion and contraction and also changes in pressure as coolant warms and cools with engine operation. Various gaskets, seals, hoses and clamps are used to contain coolant within the cooling system and keep other fluids and contaminants from entering the cooling system.
Coolant loss can be attributed to either external or internal leaks anywhere within the cooling system.
Possible Sources
- Coolant hoses or tubes
- Hose clamps
- Quick connect couplings
- Thermostat O-ring seal or gasket
- Coolant pump O-ring seal or gasket
- Radiator
- Pressure relief cap
- Coolant pump leaking from weep hole
- Degas bottle
- CAC
- Fuel cooler
- ECT sensor - secondary cooling system ECT 2