If ice forms anywhere in the engine, it can crack the block.
The sillicate sin the antifreze react with the chmber of the engine
if you run your engine without antifreeze your car will overheat and ruin the engine.
crack the engine block and oil mixes with water or antifreeze.
you have a big problem
vehicle will overheat. just dump the oil and antifreeze , flush engine and refill with clean oil
It will destroy the engine from lack of lubrication and overheating.
If you run it that way you will cause internal damage.
I BELIEVE straight antifreeze will freeze at 7 degrees Fahrenheit but a 50 / 50 mix is good to around -34 degrees Fahrenheit ( antifreeze and preferably distilled water ) Also , the engine sensors for the engine coolant temperature won't work properly
When antifreeze is poured into your oil, it weakens your oil cause it to break down prematurely and can cause your engine to fail by spinning an engine bearing and even smoke. This is also a sign of a blown head gasket.
If you start and warm up your engine: 1) The oil gets very foamy and mucky, and does not circulate through the engine properly. 2) The water in the antifreeze can heat up until it turns to steam, which expands with great force, and breaks some part of the engine. It's best to have the oil changed. That will empty the engine of the oil and antifreeze mix.
Blown Head gasket. If you have a 3.8 liter v6, it happens commonplace with that engine.
If you have water instead of antifreeze in your cooling system, it will freeze! You won't be able to start the car, because the engine is connected to the water pump (which won't be able to move). If you have nothing in your cooling system (no water, no antifreeze, nothing else), then you need your head checked. Your car won't start either.