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Old 12-28-2012, 03:35 PM
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Bad thermostat or normal??

I finally have been-able to put on some miles since getting a monitor. The outside temps have been in the teens and twenties. I am only seeing ECT temps of around 177-178*...........Is my thermostat bad, or is my cooling system good??

If it makes any difference, my deltas have been around 6-9*
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Old 12-28-2012, 03:38 PM
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Originally Posted by mhines81 View Post
I finally have been-able to put on some miles since getting a monitor. The outside temps have been in the teens and twenties. I am only seeing ECT temps of around 177-178*...........Is my thermostat bad, or is my cooling system good??

If it makes any difference, my deltas have been around 6-9*
Thermostat is stuck open. When you replace it, only use a Motor Craft thermostat.
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Old 12-28-2012, 03:45 PM
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This ^^^

Sent from my phone that somebody didn't help me get.
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Old 12-28-2012, 04:54 PM
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so should i worry when i'm seeing 160-175, normally in the 160's with ambient temps up to 60?
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Old 12-28-2012, 04:57 PM
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so should i worry when i'm seeing 160-175, normally in the 160's with ambient temps up to 60?
That's extremely low. Sounds like yours is stuck completely open. Need to replace it. Will probably be surprised how much better it runs.
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Old 12-28-2012, 04:59 PM
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truck seems to run pretty well now but i do plan on digging into the engine for studs and some other things and probably will do the thermostat then.
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Old 12-28-2012, 05:10 PM
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truck seems to run pretty well now but i do plan on digging into the engine for studs and some other things and probably will do the thermostat then.
Get it changed, it's simple. Diesels require proper op temps for complete and effecient combustion. Does your oil get dirty quick from soot?

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Old 12-28-2012, 10:39 PM
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So does it make sense that i am getting good HOT heat from the heater, even if it is stuck open? The dash gauge shows normal, I have great heat, but according to the Livewire, I'm running cool.

Still change it?
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Old 12-28-2012, 10:56 PM
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when doing ur t stat upgrade to the blue spring mod too
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Old 12-29-2012, 04:46 AM
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Originally Posted by mhines81 View Post
So does it make sense that i am getting good HOT heat from the heater, even if it is stuck open? The dash gauge shows normal, I have great heat, but according to the Livewire, I'm running cool.

Still change it?
You'll have heat even if the thermostat wasn't there at all. The problem is that you're engine and sensors aren't making it to normal operating temps which is hard on it.
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