New Problem
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Freshman User
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New Problem
So I was initially having intermittent over heating issues (about once every 3 weeks or so). I put a new water pump in and thought that I was in the clear. The truck is still getting upwards of 220 degrees and the thermostat is not opening. Heat comes on initially but then disappears. Both heater hoses appear to be cold. Well the "in" hose is warm initially but then I lose heat and it goes cold.I shut the truck off and began venting the reservoir cap and all the sudden it was like the floodgates opened. I could hear the rush of coolant through the upper hose. Heat was restored and the truck runs fine. Any ideas on this? Could I have possibly gotten another bad thermostat. This one is new (Stant superstat 195 degree)
I don't know what to do anymore!
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Freshman User
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I just don't understand why the heater hoses are cold, then the thermostat opens, they heat up, I get heat and everything is dandy. Does the coolant have to flow that way for some reason? (other than heat). The system should still work with out heater hoses and a heater core (minus having heat) should it not?
Lead Driver
Joined: May 2003
Posts: 9,303
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From: Lyndonville, Vermont
Clogged Radiator? Wow hard to tell. I know head gasket issues do weird thing with temp..Either way when the thermostat see's temp it should open unless pressure keeping it closed...Do you have a infrared temp gun you could shoot at the therm housing or block? Shouldn't trust truck gauge..
Postmaster
Joined: Jan 2012
Posts: 2,693
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From: West of Chicago
Did you buy a cheap parts house thermostat? ExxV10 had a similar issue with aftermarket parts, Is the cooling fan working correctly?
OEM Motorcraft is the only good thermostat for these trucks.
OEM Motorcraft is the only good thermostat for these trucks.
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It's a Stant Superstat 195 degree. I have read that the motorcraft part is all that works for these trucks a few other places (and heard it too). Cooling fan seems to be working (in that it is spinning). Fan clutch appears to be working too, though I didn't change it when I did the water pump
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Postmaster
Joined: Jan 2012
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From: West of Chicago
It's a Stant Superstat 195 degree. I have read that the motorcraft part is all that works for these trucks a few other places (and heard it too). Cooling fan seems to be working (in that it is spinning). Fan clutch appears to be working too, though I didn't change it when I did the water pump
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DOH!
So apparently it helps to make sure the system is full of coolant for proper function. I couldn't expect me to have heat and the thermostat to open when it should when i was 1.5 gallons low. Live and learn I guess. I got so tied up with the burping the system that I forgot to refill it. When I did it just kept drinking it down. Took it out for a spin and I had heat within 5 minutes and the thermostat opened at around 206* according to my device plugged in to the OBDII port.
Postmaster
Joined: Jan 2012
Posts: 2,693
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From: West of Chicago
So apparently it helps to make sure the system is full of coolant for proper function. I couldn't expect me to have heat and the thermostat to open when it should when i was 1.5 gallons low. Live and learn I guess. I got so tied up with the burping the system that I forgot to refill it. When I did it just kept drinking it down. Took it out for a spin and I had heat within 5 minutes and the thermostat opened at around 206* according to my device plugged in to the OBDII port.
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