Only have 25 pounds compression in each cylynder 2005 alantra gt car did not get hot

This sounds like your power steering has failed. The belt that snapped turns a pump for the power steering. Do you have any steering at all? If the pump has failed your steering will work but it will be very heavy to turn. (replace the pump). If the steering is locked solid it is probably an issue with the actual steering rack itself. (possibly replace the whole steering rack). Depending on which this is it can be a big job to repair. Get a Good mechanic to look at it and they will be able to tell which it is.

The bearing on the crankshaft at the timing belt has come apart

sounds like the tbelt jumpped and bent some valves or overheated and warped the head to really find out you have to remove the head and send it to a shop for testing other than put a camera down in the cylinders and check for valve damaged but its hard to see i would go for the head removal i am sure the timing belt jumped and damaged valves were the spark plugs ok or broken off

On number 1 cylinder. When the crankshaft pulley notch is on the zero degrees mark on the pointer scale, and the camshaft sprocket is on its mark, the number one cylinder should be at top dead center of the compression stroke. Rotor should be pointing to number one.

compression reading should be between 175-225lbs... 25 is extremely low so timing could be off

broken cam belt

actually if you have never done this before, yes...
there is atool to hold the crankshaft pulley in place to remove and re-torque the crankshaft bolt, you'll need a vise to compress the tensioner, they recomend a tool to remove the slack in the belt after installing the new belt, and you'll need an inch pound torque wrench and a foot pound torque wrench that is able to go to 184 NM. air tools help ALOT!

you bent the valves there should be at least 80 pounds 125 is ideal so you dont have enough comprssion

very unlikely. Check to see if a spark is being generated to the spark plugs. Could be electrical. Check compression on at least one cylinder to see if it is within specs. If not, you probably have a broken timing belt. If it tries to start and doesn't sound normal turning over, it may be because you have almost no compression...again sign that the timing belt is broken. Last possibility if all this pans out: bad fuel pump. Crack a fuel line going to the engine and try to start (if no fuel appears, fuel pump is not working...it should produce some 40 pounds of pressure or so).

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