What Causes High Coolant Temperature in Dodge Journey?

1 Answers
DiCharlotte
07/30/25 10:37am
The following are possible causes for high coolant temperature issues: 1. Installation-related causes: Excessive distance between radiator and engine, or fan located outside the wind circle. Solution: Adjust radiator installation position. If AC condenser blocks the radiator, there are two solutions: a) Relocate condenser if engine compartment has sufficient space; b) Install electric fan in front of condenser if generator output is adequate. 2. Maintenance-related causes: The engine's compact structure with narrow water passages requires using soft water or distilled water in southern regions to prevent scaling. In northern areas, use genuine coolant (antifreeze) from authorized service stations to prevent cylinder head corrosion. When refilling coolant after engine drainage or severe coolant loss, trapped air may cause vapor lock leading to overheating. Solution: After refilling, run engine for several minutes, then reopen filler cap and top up coolant. Using gasoline below specified octane rating (prohibited in principle) or advanced ignition timing may cause engine knocking and overheating. Solution: Adjust distributor to slightly retard ignition timing. Daily pre-drive checks should include verifying oil and coolant levels, ensuring radiator is full. Loose fan belt may cause overheating - adjust belt tension appropriately. 3. Component failure causes: If AC idle speed is too low, check AC idle speed booster operation. Warped cylinder head or blown head gasket may cause overheating. Diagnostic method: With cold engine, remove filler cap and start engine - if bubbles emerge from radiator, this indicates the issue. Faulty cooling system components (thermostat, water pump, fan clutch etc.) may cause overheating - inspect and replace defective parts.
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