Heater does not through out any heat and theres a water leak in the engine compartment

Most likely problem is a leaking heater core. This is what usually causes water leaking into the passenger compartment. Quick fix on many vehicles is to get a hose adapter the same internal diameter as the heater hoses, remove the heater hoses from the firewall connection to the heater core, and install the adapter, making a bypass loop. This will allow operation of the vehicle without coolant loss until you can replace the heater core. Of course you will have no heat in the passenger compartment during this time.

It is likely that the heater core has sprung a leak, or the hoses leading to the heater core have failed. This would cause a loss of coolant that would make the coolant temperature sensor think it wasn't necessary to turn the fan on, and would cause steam to appear to rise out of the back of the engine. If you turn the heater on inside the passenger compartment and get steam through the vents, it's DEFINITELY a heater core breach. Otherwise, check the hoses leading to the heater core and make sure they are still connected and not leaking. Good luck!

There should be a plug sticking out of or near the front grill. Block heaters are generally connected to the oil pan.
If you meant the heat exchange that brings heat from the engine into the passenger area, that is on the psssenger side betwern the firewall and the dashboard, usually near the glove compartment. This heater core will leak sweet-smelling radiator fluid (engine coolant) onto thr floorboards if it is defective. If you just aren't getting heat, be sure your coolant level is full, and if it is (but there is no leaking into the passenger area,) then look at the valve inside the engine compartment, and at what is called the Blend-door.

Either a hose isn't tight or has a crack in it. You could also have a defective heater core.

If it is the water pump the water will be coming from the front of the engine. If it is the heater core it will be coming from the firewall area and you may even have water (coolant) leaking into the passenger compartment on the passenger side floorboard.

Do you have any heat in the heater if not the water is most likely coming from a bad heater core leaking. If it is sorry to break the bad news. You have to take the dash out and some parts in the engine compartment. Heater core is reasonable to replace but the labor will kill ya. Good luck

Sounds like one of two things are happening. Either the hose going to the heater core (on the engine side of the dash) is leaking causing coolant to spray into the passenger compartment or your heater core is leaking which is causing the dripping from the passenger side of the dash. This would also cause a loss of coolant in the engine which would cause the engine to overheat and not enough coolant to get to the heater core to supply heat to the passenger compartment. Check your coolant level (while engine is cold) and refill it with a 50/50 mix of coolant and water after you tighten the leaking hose or replace the heater core.Then start the engine and let it warm up to operating temperature. Again let it cool down and then top off the radiator with the 50/50 mix of coolant. Do not under any circumstances open the radiator cap while the engine is hot.

it is the heater water supply and return, that supply water to the heater core to supply heat using hot water from the engine, the hose clamp my be loose or the hose has a hole in it you have to trace it from unner the hood fire wall to where it connects to the heater under the dash

your heater core is going out on the car...its leaking water into the car

Sounds like a blown coolant hose, or a faulty coolant water pump.