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  #1  
Old June 11th, 2019, 20:31
Jeepercreeper01 Jeepercreeper01 is offline
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It's been discussed a millions time so what's a million and 1 more

I own a 2001 jeep cherokee xj. I recently dropped a reman motor with no miles into it.also replaced the water pump with a hi-flow, thermostat (195), thermo housing, electric fan, temp sensor, radiator cap and fan clutch. Radiator is approximately 3 years old from cfs 2 row. It's not leaking.
Here is my issue. The damn thing is running at 215 down the highway. I live in AZ where it's 108 degrees today. Is this normal or should it be running a little cooler.
Things to note : the Ac is currently out of operation. So it hasn't been in use while driving. Also, the radiator was burped and filled with %100 antifreeze. No distilled water.
What would cause it to run so hot??
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  #2  
Old June 11th, 2019, 20:45
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Runnin'OnEmpty Runnin'OnEmpty is offline
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Re: It's been discussed a millions time so what's a million and 1 more

The 100% antifreeze actually doesn't cool as well as pure water.
A 50-50 mix will cool it down some. I'd try that and go from
there...
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Old June 11th, 2019, 21:00
Jeepercreeper01 Jeepercreeper01 is offline
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Re: It's been discussed a millions time so what's a million and 1 more

Thank you for the advice. I will definitely try that first. I read the exact same thing during a Google search.
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Old June 11th, 2019, 22:33
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lazyxj lazyxj is offline
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Re: It's been discussed a millions time so what's a million and 1 more

Are you sure the engine is overheating?
Buy or borrow an digital infrared thermometer and check the temperature of the thermostat housing, when the engine is hot, and see how the actual temp compares with the indicated temp on the dash gauge.
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Old June 12th, 2019, 05:03
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ehall ehall is offline
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Re: It's been discussed a millions time so what's a million and 1 more

108 ambient is pretty dang hot

But yes you need to get an IR temperature gun and verify gauge against the actual temperature. You can also use an OBDII scanner to read the sensor value and verify the gauge is showing actual value.
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  #6  
Old June 12th, 2019, 16:21
Jeepercreeper01 Jeepercreeper01 is offline
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Re: It's been discussed a millions time so what's a million and 1 more

I really appreciate all the input guys. The Jeep is overheated on me since day one when I purchased it 10 years ago. I thought replacing a whole new motor and a lot of cooling components would be a cure-all. I have both these items you mentioned a hook up my scanner today and bust out the infrared temp gun and compared against the actual gate itself. My only other thought is that the radiator being 3 to 4 years of age is plugged up
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Old June 13th, 2019, 08:33
Black1990jeep Black1990jeep is offline
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Re: It's been discussed a millions time so what's a million and 1 more

I suspect part of the problem is the high concentration of antifreeze, that can damage a motor with overheat! dilute to 50/50 mix using distilled water. tapwater has too many minerals in it, so buy the distilled at any grocery store. you want distilled, not the purified nor spring water. Distilled is what to use..
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Old June 13th, 2019, 20:57
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Runnin'OnEmpty Runnin'OnEmpty is offline
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Re: It's been discussed a millions time so what's a million and 1 more

One other thing to try, is install a 180* thermostat.

I'll catch flak for suggesting that, but a lower temp
thermostat won't affect closed loop operation at all,
and will give you a lower underhood temperature.
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  #9  
Old June 14th, 2019, 09:16
macgyver_7_6 macgyver_7_6 is offline
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Re: It's been discussed a millions time so what's a million and 1 more

I haven't tried them, but some people install the hood vents.
Sounds like they have success.


I'm going to try a bottle of waterwetter coolant additive for this summer.
My entire coolant system is rebuilt....main fan is stock with new clutch tho.
If 90 degrees here in Missouri, my stock guage reads above the 210 hash mark.
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Old June 14th, 2019, 12:55
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Re: It's been discussed a millions time so what's a million and 1 more

A properly operating cooling system should be able to handle it. In the upper nineties last couple of weeks I still get 195 on the dash, even in stop and go driving. Haven't done highway hill climbing but I did last summer with temps around 101 and still was under 200.
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  #11  
Old June 14th, 2019, 14:30
puredrive puredrive is offline
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Re: It's been discussed a millions time so what's a million and 1 more

my 2c, double check that there is no air in the system.
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  #12  
Old June 14th, 2019, 14:47
RCP Phx RCP Phx is offline
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Re: It's been discussed a millions time so what's a million and 1 more

Quote:
Originally Posted by puredrive View Post
my 2c, double check that there is no air in the system.
The late model cooling system(closed) is "self purging" so that's not necessary as long as you keep the reservoir full and a good cap on it.
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  #13  
Old June 14th, 2019, 15:16
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Johnnie Walker Johnnie Walker is offline
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It's been discussed a millions time so what's a million and 1 more

Aside from proper ratio, I also use watter wetter in my cooling system.
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Old June 14th, 2019, 16:35
lawsoncl lawsoncl is offline
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Re: It's been discussed a millions time so what's a million and 1 more

X2 on a proper coolant mix. With 108 ambient, I'd go 50-70% at most. Pure antifreeze is about 35% less effective than a 50/50 mix. Automatic transmission? Is the torque converter locking up properly? That'll add some heat via the tranny cooler in the radiator.
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  #15  
Old June 14th, 2019, 17:10
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blu3fan blu3fan is offline
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Re: It's been discussed a millions time so what's a million and 1 more

I live in Az.
Here's what I did and I run at 170 always.
Remove the thermostat.
That is all.
You can thank me once you do it.
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