Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
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when the van runs and is hot are both heater hoses hot?? if they are then the heater core is ok. if you have one hot and one colder, then it is clogged internally.
ok, 2 possibilities, one is the water pump. it is responsible for water flow. the other is a restriction in the heater hoses.
if you have rear heat, the water pump has to work. if you pull off both hoses, is there any circulation???
the hose attached to the heater control valve is the feed line to the heater core. the other is the return.
yes, you need to remove the feed lines from the valve and check for flow.
I dont have a diagram but you have the 2 hoses for the front heater, 2 hoses for the rear heater and the remaining 2 are the ones you need to hook to. they will trace back to the motor.
the water pump sends coolant to the heater control valve which distributes the coolant to the front and rear heater core. the return lines go back to the intake manifold. so you have 2 lines from the motor to the heater valve, 2 lines to the rear heater and 2 to the front heater.
lower hose to pump, pump out to the heaters and the block up to the thermostat and back to the radiator.
you need to take the hoses from the motor off the heater valve and use joiners to the front heater core. you can get the joiners at a parts store.
that is correct