How hot when wheeling?

lfhoward · **Posted:** Tue Jul 02, 2013 7:53 am

Hi all,
I was wondering how hot your coolant gets while wheeling? My Scangauge was telling me mine was up at 218 degrees before the fan kicked in to bring it down. Is this a little high?
Thanks,
LFH

TheBlueKJ · **Posted:** Tue Jul 02, 2013 2:00 pm

lfhoward wrote:

Hi all,
I was wondering how hot your coolant gets while wheeling? My Scangauge was telling me mine was up at 218 degrees before the fan kicked in to bring it down. Is this a little high?
Thanks,
LFH

I can tell you it can get hot, since there's more stress and strain on parts. I've got the HD cooling setup and since mine is an early '03, it's got even more extra cooling goodies that I've forgotten what they are atm :-)r

05renny · **Posted:** Tue Jul 02, 2013 10:26 pm

I'm bummed it was even an option on the Renegades! I'm very paranoid about getting the jeep hot when wheeling-- once she's good and heat soaked, they won't come down for a while.

tjkj2002 · **Posted:** Tue Jul 02, 2013 10:43 pm

The electric cooling fan does not turn on til 219 degrees(+/-2 degrees),If you have HD cooling the mechanical fan clutch does not fully lock till 230 degrees.Heck the OE t-stat just starts to open at 195 degrees but does not fully open till 218 degrees.

Ted15 · **Posted:** Wed Jul 03, 2013 5:22 am

tjkj2002 wrote:

The electric cooling fan does not turn on til 219 degrees(+/-2 degrees),If you have HD cooling the mechanical fan clutch does not fully lock till 230 degrees.Heck the OE t-stat just starts to open at 195 degrees but does not fully open till 218 degrees.

Is it a good idea to change some of that? What would be a better temperature setting? That seems pretty high.

tjkj2002 · **Posted:** Wed Jul 03, 2013 7:43 am

Ted15 wrote:

tjkj2002 wrote:

The electric cooling fan does not turn on til 219 degrees(+/-2 degrees),If you have HD cooling the mechanical fan clutch does not fully lock till 230 degrees.Heck the OE t-stat just starts to open at 195 degrees but does not fully open till 218 degrees.

Is it a good idea to change some of that? What would be a better temperature setting? That seems pretty high.

No,it would mess with the pcm.Your engine is designed to run at those temps.

lfhoward · **Posted:** Wed Jul 03, 2013 7:48 am

Thanks, tjkj2002. It's good to know that the coolant temp is fine.

tjkj2002 · **Posted:** Wed Jul 03, 2013 10:13 am

lfhoward wrote:

Thanks, tjkj2002. It's good to know that the coolant temp is fine.

I know mine when I'm wheeling will go to 219,fan kicks on(no HD cooling) and drops to about 210,then the fan kicks off.It does that cycle 3-4 times then the fan just stays on and the temps drop to between 194-199 degrees and don't move since the fan just stays on.

LibertyFever · **Posted:** Sun Jul 07, 2013 9:06 pm

I have the HD cooling setup and my 04 Liberty Sport has run hot while in 4WD since the first days I've owned it. The transmission over temperature indicator lamp would come on.

I've discovered two issues.
#1 the two speed electric fan had only one working speed
#2 the mechanical clutch fan wasn't working as it should

I've replaced both but I'm still having transmission over temperature problems in 4WD.
I'll change my ScanGauge readout to F and see if the fans are kicking in when they should.

Oh yeah, and for the best cooling keep your rad clean.

sent from my Galaxy SIII & Tapatalk4 beta

tjkj2002 · **Posted:** Mon Jul 08, 2013 4:29 am

LibertyFever wrote:

I have the HD cooling setup and my 04 Liberty Sport has run hot while in 4WD since the first days I've owned it. The transmission over temperature indicator lamp would come on.

I've discovered two issues.
#1 the two speed electric fan had only one working speed
#2 the mechanical clutch fan wasn't working as it should

I've replaced both but I'm still having transmission over temperature problems in 4WD.
I'll change my ScanGauge readout to F and see if the fans are kicking in when they should.

Oh yeah, and for the best cooling keep your rad clean.

sent from my Galaxy SIII & Tapatalk4 beta

Use 4low,that is why your trans overtemp light comes on while wheeling.

TheBlueKJ · **Posted:** Tue Jul 09, 2013 12:30 pm

tjkj2002 wrote:

LibertyFever wrote:

I have the HD cooling setup and my 04 Liberty Sport has run hot while in 4WD since the first days I've owned it. The transmission over temperature indicator lamp would come on.

I've discovered two issues.
#1 the two speed electric fan had only one working speed
#2 the mechanical clutch fan wasn't working as it should

I've replaced both but I'm still having transmission over temperature problems in 4WD.
I'll change my ScanGauge readout to F and see if the fans are kicking in when they should.

Oh yeah, and for the best cooling keep your rad clean.

sent from my Galaxy SIII & Tapatalk4 beta

Use 4low,that is why your trans overtemp light comes on while wheeling.

I use 4HI and I'm fine. What's the difference between the two? different torque outputs?

tjkj2002 · **Posted:** Tue Jul 09, 2013 12:34 pm

TheBlueKJ wrote:

Use 4low,that is why your trans overtemp light comes on while wheeling.

I use 4HI and I'm fine. What's the difference between the two? different torque outputs?[/quote]
The gear reduction is 2.72:1 times greater in 4low,runs higher engine rpm's but less stress on the engine and trans.

Since you have a '03 you could have the 45RFE and the in-radiator trans cooler which would explain why you don't have issues in 4hi while those with the 42RLE and the stand alone trans cooler will have issues with the trans overheating.

TheBlueKJ · **Posted:** Tue Jul 09, 2013 4:10 pm

Yea I lucked out and have the 45RFE

fortx4 KJ · **Posted:** Tue Jul 09, 2013 4:52 pm

Know where I can find a 03 radiator with the trans cooler other then the junk yard? I would rather order a new one.

tjkj2002 · **Posted:** Tue Jul 09, 2013 6:06 pm

fortx4 KJ wrote:

Know where I can find a 03 radiator with the trans cooler other then the junk yard? I would rather order a new one.

Just buy one,brand new, for a '02 KJ with a auto trans.It will be direct fit in your '04 though you will have to mod the trans cooler lines(just 1 line,the other still goes to the OE cooler) to use the in-radiator cooler.Make sure you mod the trans cooler line that is the hot line from the trans,you want the in-radiator cooler to cool the fluid 1st before going to the stand alone OE cooler.

How hot when wheeling?

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