no hot air => valve in the heater core?
#1
#2
Join Date: Mar 2008
Location: Pacific Northwest USA
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#3
Here's my order-of-precedence:
Thermostat stuck open (renew - don't crack the ears on the housing!)
Heater core clogged (backflush with water/radiator flush)
Coolant pump brushes worn out (renew brushes)
Water valve stuck closed (renew valve)
There are TSB's about the heater core in the large file download area. There is a how-to with pics for flushing the heater core and for replacing the brushes on the coolant pump. I can't recall anyone claiming a failed water valve...which is odd..
Thermostat stuck open (renew - don't crack the ears on the housing!)
Heater core clogged (backflush with water/radiator flush)
Coolant pump brushes worn out (renew brushes)
Water valve stuck closed (renew valve)
There are TSB's about the heater core in the large file download area. There is a how-to with pics for flushing the heater core and for replacing the brushes on the coolant pump. I can't recall anyone claiming a failed water valve...which is odd..
#5
50% is about where it runs at proper temp. Also where it runs across a wide range of temps - gauge is not terribly sensitive/precise....Best to get an OBDII adapter and read the temp directly from the ECM. But on the face, sounds like your T-Stat may be ok...if your upper radiator hose is uncomfortably hot to touch, it is not likely your t-stat.