Effects of Overheating on Basic Engine Parts
Points : effects of overheating on basic engine parts, mechanical problems of i.c. engines, problems in internal combustion engines, ic, engine, auto diesel
Engine Overheating
Engine overheating is a serious problem that can cause major engine damage. The driver may
notice the engine temperature light glowing, temperature gauge reading high, or the coolant
boiling. Boiling coolant will expand and blow out through the over flow as steam.
Common causes of engine overheating are:
1. LOW COOLANT LEVEL (leak, lack of maintenance has allowed coolant level in engine and radiator
to drop too low).
2. RUST OR SCALE (mineral accumulations in system have clogged radiator core or built up in
water jackets.)
3. STUCK THERMOSTAT (thermostat fails to open normally restricts coolant flows).
4. RETARDED IGNITION TIMING (late ignition timing allows combustion flame to blow out open
exhaust valve, transferring 100 much heat into exhaust valves, ports. and manifold).
5. LOOSE FAN BELT (water pump drive belt slips under load and reduces coolant circulation).
6. BAD WATER PUMP (broken pump shaft or damaged Impeller blades prevent normal pumping action).
7. COLLAPSED LOWER HOSE (suction from water pump may flatten hose if spring is missing or hose
is badly deteriorated).
8. MISSING FAN SHROUD (air circulates between fan and back of radiator, reducing airflow through
radiator).
9. ICE IN COOLANT (coolant frozen from lack of antifreeze can block circulation and cause
over-heating).
10. ENGINE FAN PROBLEMS (fan clutch or electric fan troubles can prevent adequate airflow
through radiator).
Any of these, or other troubles, can make the engine overheat.
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