05 Liberty CRD overheating??? - JeepForum.com

 
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post #1 of 13 Old 07-08-2010, 07:32 PM Thread Starter
Dieselgirl
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05 Liberty CRD overheating???

I've been having a problem with my jeep overheating during hot weather grade climbs or during towing up hills. It runs in the red for just a second and I hear a ding and then the auxillary fan kicks on and cools it down to normal. Seems to me like the thermal switch that controls the auxillary fan isn't set at the right temperature or something. Anyone else have this problem and fixed it? Other than this issue I love the hell out of it. Great power and fuel economy! She's got about 78K on it right now. The only other issue I've had was replaced blown intercooler lines.


Last edited by Dieselgirl; 07-08-2010 at 09:33 PM.
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post #2 of 13 Old 07-08-2010, 08:21 PM
WXman
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Sounds like your thermostat may be dead or dying. It's hard to say for sure unless we know specifically how long you're climbing the hill, how hot it is outside, how fast you're going, etc.

'92 YJ - heavily modded
'96 ZJ - heavily modded
'05 KJ CRD Limited - 370 lb./ft. from a 4-cylinder and trail ready. Pure awesomeness.
'11 Mango Tango JKU Sport - Mods
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post #3 of 13 Old 07-08-2010, 08:37 PM
95BadBoy
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I don't know that there is any setting adjustment for the aux fan. Though the aux fan should have kicked in B4 hitting the chime one would think. The actual reading on CRD's temp gage is a more than a little different compared to other vehicles though. Maybe a slightly stubborn stat. Is there any upgrades on your 05 ?

Has the HOAT coolant been changed on your rig yet? Just throwing that one out there. Hopefully another owner that has experienced this issue will chime in.

05 TJ RME 42RLE with some things
05 KJ CRD 545RFE, GDE Eco tune, Franky II, Al's 4.5 A-arms, JK Rubi Moabs, Silent Armors 245-70-17's, Spidertrax Adapters, Rola Basket, Fumoto Valve, Pinch welds pounded - Sold 2015
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post #4 of 13 Old 07-08-2010, 09:38 PM Thread Starter
Dieselgirl
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5 mile 6% grade. 70-103 degrees. No idea what a hoat coolant is. The aux. fan (I'd think) should kick on before it got to the red which is why I'm saying that the sensor must be inaccurate.
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post #5 of 13 Old 07-09-2010, 05:12 AM
95BadBoy
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Hoat is just the type of coolant used in our KJ's. It does have a life span, but don't believe that it is the cause of the overheating.

05 TJ RME 42RLE with some things
05 KJ CRD 545RFE, GDE Eco tune, Franky II, Al's 4.5 A-arms, JK Rubi Moabs, Silent Armors 245-70-17's, Spidertrax Adapters, Rola Basket, Fumoto Valve, Pinch welds pounded - Sold 2015
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post #6 of 13 Old 07-09-2010, 05:55 AM
GDE
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dieselgirl,

The 2005 KJ CRD coolant gauge on the cluster is very biased to read hot when pulling grades with trailers. There was a TSB to reflash the cluster and this will recalibrate the gauge to read slightly more accurate. Here is a link that shows the 2006 coolant gauge vs. the 2005 coolant gauge calibration.

There is some variability in the mechanical fan enagagement temperature, but it turns on long before the engine is overheating. The engine also has a self protection mode to prevent overheating...as the temps reach the safe limit the engine will start to limit the allowable injected fuel quantity until stabilization is reached.

Coolant Gauge Breakdown


GDE
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post #7 of 13 Old 07-09-2010, 03:04 PM Thread Starter
Dieselgirl
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Just found a sticker on the underside of my hood that says:
Replace torque converter
Reprogram ECM & TCM
Recall F32 Dealer Code: 68840
12-15-06

So this thing IS getting quite hot. Maybe my thermostat is bad?

Last edited by Dieselgirl; 07-09-2010 at 03:56 PM.
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post #8 of 13 Old 07-14-2010, 03:33 PM Thread Starter
Dieselgirl
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Update!

Well my husband fixed it. Now I remember why I married him
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post #9 of 13 Old 07-14-2010, 07:22 PM
95BadBoy
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Quote:
Originally Posted by Dieselgirl View Post
Well my husband fixed it. Now I remember why I married him

What turned out to be the cause of the problem?

05 TJ RME 42RLE with some things
05 KJ CRD 545RFE, GDE Eco tune, Franky II, Al's 4.5 A-arms, JK Rubi Moabs, Silent Armors 245-70-17's, Spidertrax Adapters, Rola Basket, Fumoto Valve, Pinch welds pounded - Sold 2015
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post #10 of 13 Old 07-15-2010, 06:14 AM
dfw
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I followed someone's advice by limiting RPM's. When towing on the long grades in hot weather, keep your RPM's below 2000. As you let your RPM's go higher than 2000 the gauge will follow. Obviously, this approach limits speeds to about 45mph when the tranny is in 3rd.
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post #11 of 13 Old 07-15-2010, 09:07 PM Thread Starter
Dieselgirl
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Took the rig to the dealers to reflash the temperature gauge, added a tube of Dr. Trannys instant shudder fix, unplugged the MAF and removed/cleaned/replaced the MAP sensor.
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post #12 of 13 Old 11-09-2014, 06:53 AM
jakirsc58
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I too have had the overactive water temp gauge on my CRD. Given everything i have read in this forum is the recommendation to turn off OD, stay under 2000 RPMs while climbing, and get the dealer to recalibrate the temp gauge? I tow a Rockland Roo 23IKSS and I only have apparent trouble with the temp gauge on long inclines in hot weather. Everyone agree the CRD can reliably tow 5000 pounds when configured properly? Thanks.
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post #13 of 13 Old 11-09-2014, 07:21 AM
95BadBoy
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First Post - Welcome to JF -


Please fill in your Jeeps Info. If all things are up to snuff, yes you can tow that with proper configuration. Keep it out of overdrive on long grades and RPM's down. Have you checked into a GDE (Green Diesel Engineering) tune? Does wonders for these little tractors.

05 TJ RME 42RLE with some things
05 KJ CRD 545RFE, GDE Eco tune, Franky II, Al's 4.5 A-arms, JK Rubi Moabs, Silent Armors 245-70-17's, Spidertrax Adapters, Rola Basket, Fumoto Valve, Pinch welds pounded - Sold 2015
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