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Old 11-18-2002, 11:37 PM   #12
Piston
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Join Date: Oct 2002
Location: Olathe, KS
Posts: 2,300
hehe dont worry... we're along way from minivan status!

Something you mentioned struck me as odd, You say that both heater hoses were hot right? Was this test done with the blower motor on high and the heater on?

Here's where im heading with this... A restricted heater core will act "OK" at lower fan speeds and hot coolant temp. Turn the fan on high and now you have luke warm air coming out. The heater core doesnt have the capacity to handle that kind of air flow if its restricted. (coolant flow)

Sorry I should have been more clear on the heater hose test... You MUST have the heater on high fan speed for this test.
I'm willing to bet you'll find that the exhaust hose is now cool or cooler than the inlet hose. What coolant the heater core is allowing through is being cooled extremely well which is why the outlet hose will be cold/cooler.
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