Normal Operation
WARNING: This page is about a different variant/trim than selected.
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 engine specific information, refer to ENGINE COOLING in the Description and Operation portion of this information.
This pinpoint test is intended to diagnose the following:
- Coolant hoses or tubes
- Hose clamps
- Thermostat O-ring seal
- Thermostat housing O-ring seal
- Thermostat housing
- Coolant pump O-ring seal or gasket
- Coolant pump housing
- Coolant pump
- Radiator
- Transmission fluid cooler in radiator (if equipped)
- Pressure relief cap
- Coolant pump leaking from weep hole
- Heater core
- Engine gaskets
- Degas bottle
- Cylinder block core plugs
- Cylinder head core plugs
- Block heater (if equipped)