Usually this is due to the engine having frozen, normally due to insufficient or lack of Antifreeze. Or the failure of Block Heaters.
Water expands when it freezes, metal contracts as it gets colder, consequently, the cooling system will burst at it's weakest point.
it is not a cracked engine block it is just a loose block
Antifreeze in the oil of any engine means there is a crack in the head gasket, or worse, in the block.
Hey Nena==I presume someone told you that the block is cracked. This happens if the engine gets extremely hot. You just have to take the heads off and look for the cracks or have the block magnafluxed at a machine shop. It also should smoke white smoke while it is running if it is cracked. GoodluckJoe
mechanical energy
losing coolant from no apparent hose or fitting Overheating You might be able to see the crack and sometimes the cracks arent visable by our eye. your over flow container will be bubbling even when you first shut the veichle off. you will notice thick white smoke pouring out your tail pipe. this is caused by either a cracked head, cracked block, blown head gasket and or a cracked intake plenum. if you take the head/s off of the engine block check very closely for cracks on the head and examine the gaskets for missing peices of cracks, to the same inside the cylinder walls. if you canot see cracks on the head/s take it to you nearest machine shop and they wil inspect them for you. if you do not see cracks in the cylinder walls you have a couple of options, A: turn the crank shaft manually so the pistons will move so you can see the rest of the cylinder walls B: drop the oil pan and remove the pistons from the crank shaft so the entire cylinder wall will be exposed, but BE CAREFULL!!! If you must remove the distrubutor for any reason make sure you mark where the harmonic balance was or you will mess up your timming. C: take the block into a machine shop and have them "magnafuxed" the block, this will tell them exactly where the crack is. Good luck!
it is not a cracked engine block it is just a loose block
An oil leak.
Visually on the outside. Internal cracks there will almost certainly be a mixing of the oil an coolant one way or the other.
Lack of anti-freeze in sub-freezing temperatures. The water in the block freezes and expands.
faults
Check for hairline cracks (very hard to see) inside the distributor cap. This causes cross firing.
A hole in your block comes from massive mechanical failure. Mostly a broke rod or crank. If you have a hole in your block, you need a new motor.
The freeze plugs are designed to blow before the engine cracks on a 1997 Aurora. The process is not foolproof, and the block could still possibly crack.
You can "Magnaflux" the block assuming the block is cast iron or steel and the block is stripped down and cleaned for rebuilding.
Most likely the problem is with the Pressure Sensor in the engine block.
This can sometimes happen when water finds a way into cracks, which then freezes, expands, and this process repeats, making cracks.
by you