2000 DII 107K miles
It has been fairly cold here around -6F and my heater is just not keepin up. I usually start my truck around 30 min before I leave. When I go to leave the temp guage is in the normal range but the vent is blowing cool air. The temp guage never goes above the normal range.
The live data from my OBDII shows coolant temp at 194-200F but the vent temp is 70F at idle and 90 at higway speed @ 2500rpm.
As a test I put cardboard completly blocking the radiator.
The coolant temp came up to 216 but at idle the vent temp did not come up. On the highway the vent temp came up to 126 but when I stop the vent temp drops quickly.
I have had a small coolant leak from somewhere I can't find. There is no water on the floor or indication that the heater core is leaking. I have had the "slosing dash" for a while and occasionally have to add a quart or two of coolant.
Is it possible for a water pump to partially fail?
Is there some valve to the heater core that is not opening?
Is there a giant air bubble in the heater core that is stopping fluid flow?
Thanks
Mark
It has been fairly cold here around -6F and my heater is just not keepin up. I usually start my truck around 30 min before I leave. When I go to leave the temp guage is in the normal range but the vent is blowing cool air. The temp guage never goes above the normal range.
The live data from my OBDII shows coolant temp at 194-200F but the vent temp is 70F at idle and 90 at higway speed @ 2500rpm.
As a test I put cardboard completly blocking the radiator.
The coolant temp came up to 216 but at idle the vent temp did not come up. On the highway the vent temp came up to 126 but when I stop the vent temp drops quickly.
I have had a small coolant leak from somewhere I can't find. There is no water on the floor or indication that the heater core is leaking. I have had the "slosing dash" for a while and occasionally have to add a quart or two of coolant.
Is it possible for a water pump to partially fail?
Is there some valve to the heater core that is not opening?
Is there a giant air bubble in the heater core that is stopping fluid flow?
Thanks
Mark