Coolant Puked again...a little - Page 4 - Ford Powerstroke Diesel Forum
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post #31 of 42 Old 09-13-2019, 07:27 PM
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Originally Posted by brazosdog02 View Post
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If it is dropping to 180°, that points to you thermostat. It shouldn't get below 192°ish after it's up to temp.

I would also buy least do the blue wire mod to be able to manually override the fan clutch when it's getting that hot
Hmm not sure I agree....for the sake of argument. The thermostat would be full open to cool the motor and with the fans the temp should dive. It doesn’t STAY at 180...it just goes down to it. Once everything stabilized again we sit at 208-215 towing.

Is this incorrect?

I’m concerned with the rapid and more than occasional spike in temp going from 210 to 235 in less than 5 seconds. WTF can even do that? Think the OEM Tstat less than 1 year old is the problem ? I can drive 150 miles with no issue and then boom ... spike.

Scroll down to the part where it talks about how to tell if your tstat is bad


https://www.carbibles.com/car-thermostat/
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post #32 of 42 Old 09-13-2019, 10:20 PM
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When the thermostat is removed, how do temperatures behave?
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post #33 of 42 Old 09-14-2019, 05:14 AM
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Without a thermostat, the coolant does not follow the intended path thru the block and heads -- the thermostat not only controls temperature, it also controls coolant flow path

Thermostats are never really fully open or closed(except when cold), mostly they are somewhere between

In my defense, I was unsupervised
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For all those wanting a premium silicone sealer Kubota 70000-73764 is the best your gonna find. This is a hybrid gray silicone that uses solvent rather than acid to start the curing reaction, this makes it safe for aluminum and and any surface that involves coolant.
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post #34 of 42 Old 09-14-2019, 07:47 AM Thread Starter
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I have never run without a thermostat and for the cost of a new one, I'm not willing to test it out. I think I can save a lot of trouble here by getting a new thermostat and putting a brand new OEM radiator in. The OEM tstat is less than 1 year old. There are a few things on this truck that OEM is not quite as good as aftermarket, but the majority of it, the Ford Engineers got right. My extensive reading here and elsewhere has lead me to see that the OEM radiator is superior to any aftermarket in pretty much every single category except for the end tanks, and mine didn't leak for 150,000 miles. Mishi is refunding my money anyway and its just not worth the risk to test out the Chinese built "Performance Radiator". I contacted them a week ago, and they have not responded at all so that tells me that I won't be getting any support from them if it doesn't work. Plus, there is no guarantee it will even arrive in decent condition and I am not paying BPD twice the price for them to put it in a fancy box.
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post #35 of 42 Old 09-15-2019, 08:38 AM
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To find the issue, I'd drive without a thermostat.

Maybe that's an alternative. My stock radiator is now 13 years old. It is still ok, but I have a camper vehicle for long journeys and would get very difficult spare parts abroad, I exchange it as a precaution.

https://www.iprresearch.com/IPR-Extr...Excursion.html
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post #36 of 42 Old 09-21-2019, 07:45 AM Thread Starter
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Just thought I would post that I was trying to get the serial number of the radiator and I cannot see it. The sides of the radiator, which used to be perfectly vertical are BOWED out about 1” on each side. Not even sure if I can get it back out.

Dude. What in the holy crap? I don't know how you build that much pressure and don't pop a cap or explode a degas bottle, but this must be why the lower hose blew. There must be some sort of crap in the radiator or slag or something that allowed it to build, balloon the radiator and not explode it.

Last edited by brazosdog02; 09-21-2019 at 07:55 AM.
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post #37 of 42 Old 09-21-2019, 09:13 AM
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Tagged, this seems like a very interesting thread
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post #38 of 42 Old 09-22-2019, 06:21 PM Thread Starter
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Here is my temperature log from today. About a 3 hour trip, flat road, 95 degree ambient on average, unloaded. Look at the temperature swings. What do you make of this? Also, note the time spent near the end of the trip in the 170's.

Unloaded

Same Chart with Additional Sensors

TOWING 6,000 Travel Trailer, 95-100 degrees ambient, mostly flat terrain.

Towing

Same Chart with Additional Sensors

The last portion of the "Towing" must have been when I was idling. Still, not a temperature I expect. Also, not sure about the "0" in there, but its only one, so It's probably a glitch in Torque or something.

All sensors seem to track with coolant temps. Don't worry about the EOT Delta, its BPD Oil Cooler.

Last edited by brazosdog02; 09-22-2019 at 07:10 PM.
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post #39 of 42 Old 10-07-2019, 09:28 AM Thread Starter
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Here is my mishimoto after towing for 2 weeks:

https://bit.ly/30TnLgH
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post #40 of 42 Old 10-07-2019, 09:32 AM
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Here is my mishimoto after towing for 2 weeks:

https://bit.ly/30TnLgH
The link doesn't work for me. May be the security settings on my browser.

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