Most likely a cracked intake manifold.
Probably has a cracked block, too :(
You have a blown head gasket. Antifreeze that should be going through a hole in your gasket and then cooling the engine head is going into a cylinder. From there it is going out an exhaust pipe as steam. It is also getting into an oil drain hole and getting into the oil pan. It is inexpensive to get a head gasket fixed compared to the cost of having a blown engine replaced.
AnswerCheck the oil, if it has a milky-whiteish tint to it, there's a good chance your head gasket is out. Answerturn on your heater and see if blows hot air. If it doesn't and it's cold this is probablly a sign you have a blown head gasket. AnswerAnother symptom of that is if your vehicle smokes heavily out of the tailpipe and if you try and drive on a hill and when you accelerate the car cuts off. Oil in the antifreeze / antifreeze in the oil, loss of performance, overheating, thick smoke out of tailpipe.
sounds like you need a new head gasket
blower motor blows hot or cold air over evaporator
When my a/c system is low on refrigerant, it blows hot on drivers side, cold on passenger side of the dashboard. This is a 1997 Buick Ultra. Recharging the system solves the problem.
Blown Heater Core - The heater fan blows past the heater core and if it has a hole in it your antifreeze ios being blown onto your windshield.
language. study island blows.
check the head gaskets before you replace motor
checked antifreeze level???
Check antifreeze level, then thermostat next, heater core last
I just fixed a similar problem on my 95 LeSabre, got info from this website. http://www.imcool.com/articles/aircondition/fix_vacuum_line.htm