Possible Causes:
* Severe overheating damage: The most likely culprit is that the extreme heat has damaged critical engine components. This could include:
* Warped cylinder head: The intense heat can warp the cylinder head, leading to a loss of compression and preventing the engine from starting.
* Cracked engine block: A less common but more serious problem, a crack in the engine block will allow coolant to leak into the cylinders or oil to mix with coolant.
* Head gasket failure: A blown head gasket is a common result of overheating. It allows coolant to mix with oil or enter the combustion chambers, leading to a milky oil residue and potentially hydrolock (liquid in the cylinders).
* Damaged pistons or connecting rods: Extreme heat can cause these internal components to warp or seize.
* Coolant system problems (even if seemingly fixed): The overheating may have been caused by a problem that *wasn't* completely resolved, such as:
* Low coolant: If you simply added coolant and tried to start it, the underlying cause of the coolant loss (leak in the radiator, hose, water pump, etc.) is still present and needs fixing.
* Faulty thermostat: A stuck closed thermostat prevented coolant from circulating properly, leading to the overheat.
* Faulty water pump: The water pump circulates coolant; a failure prevents cooling.
* Clogged radiator: Blockages restrict coolant flow.
* Electrical issues (indirectly related): The extreme heat might have damaged wiring or other electrical components, affecting the starting system.
What to Do:
1. Let the engine cool completely: This is crucial. Attempting to start a hot engine can cause catastrophic damage. Allow it to cool for several hours, preferably overnight.
2. Check the coolant level: Carefully check the coolant level in the overflow reservoir and radiator (once cool). If low, do not immediately add coolant. This may mask a leak.
3. Inspect for visible signs of damage: Look for leaks under the car (coolant is typically green, orange, or pink). Check the oil dipstick; milky oil is a strong indicator of a head gasket problem.
4. Call a mechanic: This is highly recommended. The potential for serious and costly engine damage is high. Trying to diagnose and fix this yourself without experience could make matters much worse. Describe the symptoms accurately (overheating, won't start, any visible leaks or damage).
5. Do NOT attempt to start the car again until a mechanic has inspected it and determined the cause of the overheating.
The cost of repair can range from minor (low coolant, leaky hose) to extremely expensive (blown head gasket, cracked block). Early professional attention is the best way to minimize the damage and the repair bill.
