Why is the car hood very hot?
2 Answers
It is normal for the car hood to be very hot. Here is the relevant content introduction: 1. Reason: When the engine is working, the external temperature can reach above 90℃, and the exhaust pipe temperature can exceed 500℃. Additionally, the insulation layer and lower guard plate on the hood will block the dissipation of heat, so the car hood remains very hot even long after the engine is turned off. 2. Material: The hood is made of rubber foam and aluminum foil materials, which can reduce engine noise while isolating the heat generated during engine operation, effectively protecting the paint surface on the hood and preventing aging.
I've been driving for over a decade and have studied engine thermal management. An excessively hot hood usually indicates cooling system issues. Engines operate at high temperatures and rely on coolant for heat dissipation. If the coolant is insufficient or deteriorated, heat dissipation efficiency drops; a faulty pump stops coolant circulation; a clogged or dust-covered radiator can't cool properly; a non-functioning fan (check relay or temperature sensor); or a faulty thermostat affects coolant flow. Once after a long drive, I noticed abnormal hood heat and discovered a blown fan fuse – untimely repairs could lead to engine overheating and boiling risks. Preventive measures include regularly checking coolant color/level, cleaning engine compartment dirt during car washes, and replacing coolant annually. For safety, if it's extremely hot, pull over and let the engine idle to cool down, using AC to assist heat dissipation.
