Pinpoint Test A : Loss Of Coolant: Notes
WARNING: This page is about a different variant/trim than selected.
Normal Operation and Fault Conditions
The engine cooling system is a closed system providing for coolant expansion and contraction as well as 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.
Possible Sources
- Coolant hoses or tubes
- Hose clamps
- Thermostat housing
- Thermostat housing O-ring seals
- Coolant pump gasket
- Radiator
- Pressure relief cap
- Electric coolant pump
- Heater core
- Engine gaskets (may leak internally or externally)
- Degas bottle
- ECT sensor
- Cylinder block core plugs
- Cylinder head core plugs
- Block heater (if equipped)
- Engine coolant outlet connector adapter
- Cylinder block coolant pump hole cover
- Exhaust manifold heat recovery tube