did you change the thermostat
You will need to remove the anti-freeze from your 1997 Chevrolet Venture cooling system. Remove the water lines from the heater core. Remove the heater core retaining bolts. Reverse the process to install the new heater core.
The heater core is plugged. Blow it out with a compressor. If that does not work replace the heater core.
Yes, your gas water heater will still distribute hot water.
your heater core needs to ge flushed with water in both directions
blowed head gasket or cracked head
The water continues to run into and out of the water heater. There is just no flame to heat it up.
If it is gas operated, the hot water heater may not light because it may have a defective millivolt sensor. The millivolt sensor is heated up by the pilot and generates a fractional amount of voltage telling the gas valve that the pilot is lit and the gas valve can now be safely opened to heat the water heater.
Yes
Never
No, the knock sensor helps the engine computer control ignition timing. The water pump pumps coolant through the engine, heater, and radiator.
The heater core is part of the heating and cooling system, and it is the circulation of the radiator fluid that supplies heat to the core. The water pump on the car is what is responsible for the circulation of radiator fluid.
Check to make sure that the engine coolant is full. The thermostat must be working properly as well as the water pump. The hoses going to the heater core should be warm from the water if the climate control is working on the heat side.