Pinpoint Tests: Notes
WARNING: This page is about a different car, the 2018 Ford Flex. However, it is still accessible from the selected car via links, so may be relevant.
Normal Operation
The engine cooling system is a closed system providing for coolant expansion and contraction and also changes in pressure as coolant warms and cools with engine operation. Various gaskets, seals, hoses and clamps 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.
For the coolant flow diagrams, refer to Engine Cooling .
This pinpoint test is intended to diagnose the following:
- Coolant hoses or tubes
- Hose clamps
- Thermostat O-ring seal or gasket
- Coolant pump O-ring seal or gasket
- Thermostat housing
- Coolant inlet connection
- Radiator
- Pressure relief cap
- Coolant pump leaking from weep hole
- Heater core
- Engine gaskets
- Degas bottle
- Cylinder block core plugs
- Cylinder head core plugs
- Oil cooler (if equipped)
- Block heater (if equipped)
- Turbochargers (if equipped)