What causes a car engine block to crack?

Question:
my ford taurus was not running wright then I notice muddy water in the raditor causeing engine to lock up

Answers:

How do I remove marks on the paint from a rear spoiler?

two ways:

Why does my 93 saturn sl2 cut out after idling?


1st: insuficient amount of antifreeze in the cooling system (radiator). This water can then freeze and, since water expands when it freezes, you crack the engine.

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2nd: adding cold water to an already hot engine will crack the block.

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BUT, contaminated coolant is not enough in itself to cause an engine to lock up. A cracked block, also, will not make an engine lock up. The only way to have an engine lock is either from extremely high heat; where the pistons expand to the point they can no longer move up and down in the cylinder OR catostrophic angine failure; connecting rod or crank shaft failure.

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contaminated coolant may result from a cracked block, but most often is because of a blown head gasket.

My scooter wont start?

Any number of reasons - lack of lubrication (oil), too hot, age, stress, fault in the cast. And once it's cracked, its gone. The muddy water is probably oil in your cooler. Good luck!

What causes surge in vehicle elelctical system?

its a Ford...'bound to happen :P seriously though, any mods to the intake? sounds like someone could have driven through flood and submerged the intake causing the engine to intake water and "Hydrolock". crack in engine block could come from numerous things such as, overrevving, running on running on congealed (old) oil or low oil, not changing your coolant at specified intervals, and so on..

Where check balls go in valvebody in a 85 turbo 400?

Most likely overheating.

If my lights dim when my car's in idle, what can it be??

Most often the cause is due to neglecting the cooling system, allowing the antifreeze become too weak to resist freezing. Water expands 11 times. It doesn't take long to cause serious damage to engine blocks. The expanding water forces against the inside of the water jacket causing a crack. Depending on where the crack is located, it may be welded.

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Good Luck. . .

I am putting an exhaust system on my jeep and am putting it through the back bumper?

blown head gasket or cracked head.
condensation getting in the oil causes that white milky substance to build up.
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