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OEM thermostats are now MotoRad?

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Old Dec 23, 2013 | 09:19 PM
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Finally changed out the fail safe tstat. It lasted mmmmmmaybe a week.
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Old Dec 23, 2013 | 09:22 PM
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Still seems like the dealer stat is the best so far. We have some guinea pigs trying out some other MotoRad stats. Stay tuned.
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Old Dec 23, 2013 | 09:32 PM
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Originally Posted by djb383
What gauge temps were u seeing when it "worked fine"?
I would say somewhere in the 190-200 range...........Never got up to the 210 line on the gauge.
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Old Dec 23, 2013 | 09:46 PM
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Originally Posted by jeepkid03
........I tried it in boiling water and it seemed to work, but so did the Stant I have now which keeps my Jeep at 188-197 degrees.
A t-stat should not be tested in boiling water.....it's not exposed to boiling water inside the motor. Use a cooking thermometer to monitor temp at which the stat begins to open and the temp when the stat reaches wide open. Wide open should be about 15 degrees above the open temp.

Originally Posted by William08
That small brass plug in the flange is there to let air that is trapped in the engine out. There was a post about it on here some place. If the air can't get out you can overheat the engine after changing the thermostat. If you get a thermostat that does't have the hole, simple drill a 1/8" hole in the flange. When you install the thermostat make sure the hole is up.
The small brass plug (jiggle valve) only bleeds air when the motor is not running. When the motor is running, the valve is closed and air/coolant bleed thru the dime sized hole beside the t-stat (the bypass loop). Drilling a bleed hole in the flange just slows/delays the coolant warm-up time because coolant will flow thru the bleed hole and thru the rad when the motor is cold, delaying warm-up. Both open and closed cooling systems will bleed/burp air during the normal engine heat/cool cycles as long as proper coolant levels are maintained at all times.
Last edited by djb383; Dec 23, 2013 at 09:48 PM.
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Old Dec 23, 2013 | 09:57 PM
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Originally Posted by Firehawk068
I would say somewhere in the 190-200 range...........Never got up to the 210 line on the gauge.
190*-200* sounds perfect for a 195* stat in cold ambient temps and using the heater. Just seems to me that a properly functioning 195* "fail safe" stat would have a "fail open" threshold of say 235*-240*.
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Old Dec 23, 2013 | 10:06 PM
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Originally Posted by cruiser54
Still seems like the dealer stat is the best so far. We have some guinea pigs trying out some other MotoRad stats. Stay tuned.
Yeah, hopefully my dealer one works out
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Old Dec 23, 2013 | 10:08 PM
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Originally Posted by djb383
190*-200* sounds perfect for a 195* stat in cold ambient temps and using the heater. Just seems to me that a properly functioning 195* "fail safe" stat would have a "fail open" threshold of say 235*-240*.
The fail safe I just changed never even made it to 210 and it still locked open.
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Old Dec 23, 2013 | 10:10 PM
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Some MotoRads have problems.
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Old Dec 23, 2013 | 10:19 PM
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Originally Posted by djb383
Some MotoRads have problems.
Hopefully not the one I just put in from the dealer.....lol
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Old Dec 23, 2013 | 10:32 PM
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U tested prior to installing, yes? LOL
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Old Dec 24, 2013 | 05:56 AM
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Originally Posted by kstopp
Went to the dealer today, picked up a new Mopar thermostat. Looks like I got an older one before they switched to MotoRad, as it says 2011 and made in Mexico on the box.









Not sure if anyone else brought this up, but im about to do my thermostat this week and get one from the dealer. when I pulled up your part, its says it works up to 96. Not sure if other people will have different numbers for later years. I have an 01 so Ill post a pic today when I get it.
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Old Dec 24, 2013 | 05:58 AM
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There's 83501426 and 52028186. Don't know the difference. Ask to see both at the dealer and let us know.
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Old Dec 24, 2013 | 06:07 AM
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Originally Posted by cruiser54
There's 83501426 and 52028186. Don't know the difference. Ask to see both at the dealer and let us know.
The 5202 one i believe is the one I need but ill post back.

and to jump offtopic for a second

Hey cruiser, you know the part number for the stock clutch fan replacement from Napa.
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Old Dec 24, 2013 | 06:09 AM
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Originally Posted by sycoglitch
The 5202 one i believe is the one I need but ill post back.

and to jump offtopic for a second

Hey cruiser, you know the part number for the stock clutch fan replacement from Napa.
No. Only the LOUD one.

Take pics of the stats and note any other markings if you can please.
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Old Dec 24, 2013 | 06:22 AM
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Originally Posted by cruiser54

No. Only the LOUD one.

Take pics of the stats and note any other markings if you can please.
Quick update. My dealership don't have it in stock and they close at 12. Will get it this weekend
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