Heavy Duty Equipment Technician Red Seal Exam Prep · Question
An engine is experiencing consistent overheating after a radiator replacement. The cooling system was properly bled. What diagnostic step should be prioritized next?
After bleeding the system, a common cause of overheating post-radiator replacement is a faulty or improperly installed thermostat, which regulates coolant flow.
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Question: An engine is experiencing consistent overheating after a radiator replacement. The cooling system was properly bled. What diagnostic step should be prioritized next?
Answer options: ✅ Check for correct thermostat operation and installation.
- Replace the engine oil.
- Inspect the air filter.
- Measure the tire pressure.
Correct answer: Check for correct thermostat operation and installation.
Explanation: After bleeding the system, a common cause of overheating post-radiator replacement is a faulty or improperly installed thermostat, which regulates coolant flow.
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