Why does a diesel engine always overheat and boil?

1 Answers
StHarrison
07/30/25 9:01am
The following are the reasons why a diesel engine always overheats and boils: 1. Insufficient coolant: Regularly check the coolant level in the radiator and expansion tank, and replenish it promptly if the level is low. If the diesel engine cooling system lacks coolant, it will affect the heat dissipation efficiency, leading to engine overheating. 2. Loose or faulty fan belt: Tighten or replace the fan belt; if the cooling fan is faulty, the motor and circuit need to be inspected and repaired. 3. Radiator leakage: Broken or improperly connected radiator hoses can cause leaks, which will obstruct water circulation and, in severe cases, cause the engine to 'boil.'
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