If the engine reaches 250 degrees, all the rubber and plastic parts of the engine will begin to soften, which can pose a serious risk to engines with plastic intake manifolds, because they can crack or distort, losing their shape and creating vacuum leaks even after the engine has cooled. Hot spots will begin to develop inside the combustion chamber, causing pre-ignition, which can be so damaging it can even burn holes through the top of the piston and crack the ceramic insulator of any spark plug.
265 degrees and up
At 265 degrees and above, the metal components of the engine, aluminum and cast iron will begin to soften and distort.When the engine reaches equitable above 220 degrees, combustion of the petrol can come about in areas other than even-handed in the combustion chamber; this is known as detonation. This detonation creates painful blows to the piston and can damage the piston, piston rings and even the connecting rod bearings. Detonation can damage spark plugs and create enough heat to actually melt down the ground strap of the spark plug.
250 Degrees
The pistons are acted on directly by the combustion case.Gasoline-powered internal combustion engines are designed to dart between 195 and 220 degrees, which is a indubitable microscopic window in the thought of heat created by the engine. Allowing an engine to overheat can element catastrophic damage to internal engine components and ofttimes comes with an expensive repair payment.
220 Degrees
When this type of distortion happens, the cylinder head will expand and can crush the head gaskets, creating an instantaneous mixture of engine oil and coolant. Even after the engine has cooled the cylinder heads will remain warped and will need to be replaced. The stress from this heat can cause any metal component of the engine to crack or become damaged beyond repair. The engine valves and pistons can begin to swell and scrap inside of their bores. In most cases of this type of extreme heating, the engine itself will generally seize and need to be replaced.
Effects of Extreme Heat on Coolant
A 50/50 mixture of ethylene-glycol antifreeze and water can withstand temperatures of up to 265 degrees in a sealed system before it will boil. When engine coolant becomes this hot it can potentially produce holes and leaks in old coolant hoses. An aged radiator can burst and spew hot coolant in any and all directions. If coolant gets this hot and manages to work its way into the crank case, all of the bearings and seals for the crankshaft will be ruined.
