no heat yet
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no heat yet
Have flushed and flushed system water runs through heater core both ways. I have never had so must trouble trying to get heat in my life. Rear heat ok. Front different story. What in the world is the problem. Heater hoses to front heater core luke warm rear hot. terry
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Joined: Oct 2004
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From: Central Oregon
With your heater hoses only luke warm, and the gage only 1/4 up, it sounds like the engine is not getting warm enough. My gage runs from the middle up alittle, but without a manual gage it is hard to say what the real temp is.
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Would the back vents get hot if temp not hot enough. I bought this van new in 1990 it never has reached 1/2 way alwys 1/4 or less, I have put sever thermostats in it one about a year ago.tHis has been going on sometime now but with rear air I just kinda let it go but would love to find problem. thanks
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Joined: Oct 2004
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From: Central Oregon
There is something stopping the hot water from getting to the front heater core, maybe one of the heater supply lines has a internal colapse that is slowing down the water. Sorry I can't think of anything else.
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I put a backflush t on both lines to backflush. Water goes through fine but when I leave cap off water runs internittendly. Not sure what causes this.Thanks for response I do appreciate it.
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water flow from engine comes from pipe next to thermostat housing and into bottom core fitting
water flow back to engine water pump comes from top core hose and goes to water pump fitting
later model Aeros have a vacuum controlled valve in the heater hose near the core inlets to stop coolant flow when the A/C is on.
these do fail or vac. line falls off
must be working thought if you have full flow with water hose thru the core
water flow back to engine water pump comes from top core hose and goes to water pump fitting
later model Aeros have a vacuum controlled valve in the heater hose near the core inlets to stop coolant flow when the A/C is on.
these do fail or vac. line falls off
must be working thought if you have full flow with water hose thru the core
Last edited by 96_4wdr; Nov 28, 2007 at 08:07 PM.
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I have a T fitting on top hose for backflushing.When I run water through with hose it seems to run fine.When I run engine with heat on cap off T water seems to run through o k.Mine is 1990 and does not have a heater core valve on heater hoses . What controls warer to core or does it pass over core all the time I dont think it does.
Post Fiend
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depends on if the outflow heater hose is before or after thermostat.
after thermostat = water flows thru anytime thermostat is open and water pumps is spinning
before thermostat= water flows whenever water pump is spinning
after what occurance or maintenance did the problem appear?
overheating, heater hose replacement, thermostat replacement, heater core replacement?
after thermostat = water flows thru anytime thermostat is open and water pumps is spinning
before thermostat= water flows whenever water pump is spinning
after what occurance or maintenance did the problem appear?
overheating, heater hose replacement, thermostat replacement, heater core replacement?
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