Over Heating CRD?!

clday25 · **Posted:** Mon Jul 09, 2007 3:22 pm

Went on a little road trip with the wife and dog over the weekend and had some over heating issues with my CRD. The ambient air temp was in the 90’s, so we used the A/C off and on but stopped after I noticed my Scangage II showed engine water temps creeping over 220….. We weren’t towing anything, but the trip took us over Mount Hood and Santiam Pass. I’m pretty sure this isn’t right and after playing around with overdrive on/off and T/C lockup, I think the tranny is to blame....

I bought my CRD used in October, so I don’t have any prior warm weather dividing experience with the Jeep to compare with. However, with my Scangage II installed over the last couple of months, I’ve noticed 170 degrees when driving around and will climb to 200 when the A/C is on and/or in stop-in-go traffic or driving hard. The prior owner had a new T/C installed and F31 done.

What’s everyone’s thoughts/experience with this? Do you think I have a cooling system issue or a failing T/C, pump or tranny issue? Would my ARB bumper be a factor?

Any help would be appreciated

Chris

Cowcatcher · **Posted:** Mon Jul 09, 2007 3:34 pm

Chris,

There were a few reports last summer of persons having this issue periodically and I think there was a minor resolution to it. As I recall it isn't really overheating only a misread of the sensor but if you run a search under the CRD part of the forum for "Overheating" I bet you will find it.

oldnavy · **Posted:** Mon Jul 09, 2007 4:48 pm

There is a Service Bullitin out to correct a improper reading of temp either by the gage or what ever that was causing the problem. The engine's were not over heatinng, just a error in readings.

clday25 · **Posted:** Mon Jul 09, 2007 5:10 pm

Ok, i've got a call into the dealership for an appointment tomorrow.....

My question now is, what is too hot? Assuming the Scangage is reading correctly, is 220+ degrees ok to run at? It makes me real nervous seeing my water temp an air intake temp shooting up over 220/150 under certain conditions. That doesn’t seem right.

oldnavy · **Posted:** Mon Jul 09, 2007 5:35 pm

clday25 wrote:

Ok, i've got a call into the dealership for an appointment tomorrow.....

My question now is, what is too hot? Assuming the Scangage is reading correctly, is 220+ degrees ok to run at? It makes me real nervous seeing my water temp an air intake temp shooting up over 220/150 under certain conditions. That doesn’t seem right.

220 will not hurt the engine, the reason the cooling system is pressurized to raise the boiling point above 212* F , but the problem was with onboard electronics reading in error and you scan gage gets the reading the same place as the gage. However that may not be the problem, but tell the dealer about this TSB and it will most likely save you some time and anguish. But then again you may have a real poroblem, and you are doing the correct thing by taking it to the dealer. Good luck with you visit.

Quote:

NUMBER: 08-043-05
GROUP: Electrical
DATE: August 11, 2005

THIS BULLETIN IS BEING PROVIDED IN ADVANCE. DO NOT PERFORM ANY
ACTIONS RELATED TO THIS BULLETIN UNTIL AUGUST 26, 2005. THE DRB III
SOFTWARE VERSION MUST BE AT LEVEL 62.2 TO PERFORM THIS BULLETIN. THE
DRB III SOFTWARE WILL BE AVAILABLE ON TechCONNECT BY AUGUST 26, 2005.
FOR MARKETS OUTSIDE OF THE UNITED STATES AND CANADA, THE DRB III
VERSION 62.2 SOFTWARE WILL BE AVAILABLE ON CINONConnect AND
TechCONNECT BY AUGUST 26, 2005. THE DRB III VERSION 62.2 SOFTWARE WILL
ALSO BE AVAILABLE ON THE ITIS DVD SEPTEMBER 2005 RELEASE.
SUBJECT:
Engine Temperature Gauge - Indicator Reads A Higher Temperature Than Actual
OVERVIEW:
This bulletin involves reprogramming the instrument cluster control (CCN)
module.
MODELS:
2005 (KJ) Liberty / Cherokee
NOTE: This bulletin applies to vehicles equipped with a 2.8L turbo diesel
engine
(sales code ENR).
SYMPTOM/CONDITION:
The customer may notice that the engine temperature gauge may indicate that
the engine
temperature is high. In hot ambient temperatures, and under certain driving
conditions of
extended uphill driving while towing a trailer, the engine temperature
indicator may indicate
slightly above the 3/4 normal operating temperature mark on the temperature
gauge (but
below the engine hot temperature markings). This condition may be caused by
an incorrect
calibration of the of the engine temperature gauge.
New CCN module software corrects the old engine temperature gauge
calibration.
DIAGNOSIS:
If the engine and the cooling system are operating correctly, and the above
condition is
present, then perform the Repair Procedure.
SPECIAL TOOLS/EQUIPMENT REQUIRED:
CH6000A Scan Tool (DRBIII®)
NUMBER: 08-043-05
GROUP: Electrical
DATE: August 11, 2005
CH7000A/7001A J1962 Cable with red DRBIII® connector
REPAIR PROCEDURE:
NOTE: Before proceeding verify that the DRBIII® software version is at level
62.2.
1. Connect the DRBIII® to the vehicle Data Link Connector (DLC)
2. Turn the ignition switch to the "ON" position.
3. Using the DRBIII® scan tool recalibrate the instrument temperature gauge.
a. Select "DRBIII® Standalone"
b. Select "1998 - 2006 Diagnostics"
c. Select "All (Except Below)"
d. Select "Body Interior"
e. Select "Electro/Mech Cluster (MIC)"
f. Select "Miscellaneous"
g. Select "Recalibrate Temp Gauge" option.
4. If the recalibration of the instrument cluster was successful, the
DRBIII® will display
the following message: "Recalibration Successful".
5. If the version level of the original instrument cluster software allows
recalibration, but
the recalibration of the instrument cluster was NOT successful, then the
DRBIII® will
display one of the following messages: "Recalibration Failed" or "Write To
Memory
Address Failed". If one of these messages occurs repeat the above steps.
6. If the instrument cluster has already been recalibrated to the correct
software version
level, then the DRBIII® will display the following message: "Gauge Already
Recalibrated - Press Any Key to Exit".
7. The DRBIII® will display the following message if the original instrument
cluster
software version level is not the correct version level for recalibration:
"MIC Software
Version Incorrect - Press Any Key to Exit".
8. Verify that the instrument cluster engine temperature gauge has been
recalibrated by
selecting the "Recalibrate Temp Gauge" option again. The DRBIII® should
display the
following message: "Gauge Already Recalibrated - Press Any Key to Exit".
9. Turn the vehicle ignition switch to the "OFF" position
10. Disconnect the DRBIII® from the vehicle DLC.
POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
Labor Operation
No:
Description Amount
08-45-10-94 Reprogram Instrument Cluster Control (CCN)
Module - 2.8L Turbo Diesel Engine Only
0.2 Hrs.
FAILURE CODE:
AM Authorized Modification

clday25 · **Posted:** Mon Jul 09, 2007 5:42 pm

Just found the TSB, thanks Oldnavy....

I'm getting a little sick thinking about going to the dealership tomorrow.....

oldnavy · **Posted:** Mon Jul 09, 2007 5:47 pm

clday25 wrote:

Just found the TSB, thanks Oldnavy....

I'm getting a little sick thinking about going to the dealership tomorrow.....

It's like going to the dentist for a check up and teeth cleaning.

nursecosmo · **Posted:** Mon Jul 09, 2007 6:08 pm

Autozone sells a nifty radiator cap with a temp gauge built, in I think its about $20. I used one for my f250 when the OEM gauge started reading high when I knew that it was not. It confirmed that I needed a new dash gauge. It may help you at the dealer to show that it is not really overheating (assuming that the problem is indeed computer related). Let us know.

AZScout · **Posted:** Mon Jul 09, 2007 6:46 pm

I had the TSB done and it did not correct the problem. The situation on mine occurs but is exacerbated by the use of the A/C. I was just going to live with it and get gauges installed later to see what the real temperature is and if there was truly a problem. I was under the impression that it was just an incorrect gauge per the TSB and so I waited. I may not be able to wait any longer with 115 temps here in AZ.

onthehunt · **Posted:** Mon Jul 09, 2007 7:27 pm

220 is too hot. Especially with an aluminum head. Find out where the temp sensor is located. Disconnect your egr with the orm mod and see if it helps.

clday25 · **Posted:** Mon Jul 09, 2007 8:13 pm

I agree, 220 is pretty hot, but if its true that the gauge and the Scangage are getting the incorrect reading then once i get the TSB things should be ok.... lets hope. I plan on "testing" this out with the hot weather we'll be getting the next couple of days. Probably should borrow my dad's infrared temp sensor to confirm the reading from my Scangage.

I've been ORM'ing for 3,000 miles now and it pains me to go on-road tonight before my date with the dealer.

BiodieselJeep.com · **Posted:** Tue Jul 10, 2007 9:55 am

clday25 wrote:

I've been ORM'ing for 3,000 miles now and it pains me to go on-road tonight before my date with the dealer.

A "Date" with the dealer is like a "date" with Jimmy aka "El Matador" from "C" Block?

Bring lube.

oldnavy · **Posted:** Tue Jul 10, 2007 10:23 am

BiodieselJeep.com wrote:

A "Date" with the dealer is like a "date" with Jimmy aka "El Matador" from "C" Block?

Bring lube.

Hahahahahaha!!!! ROTFLMAO!!!

o8k · **Posted:** Wed Jul 11, 2007 10:55 pm

my CRD overheats when its hot out and i go up big hills too. And from what ive seen, its too consistant with, hot up hill or low airflow events to call it a mis-read. When i go wheelin and im only doing like 10mph and its 107 out (common here in AZ), ac is on and im going up hill, the bugger just gets hot 210F+. If toodling arround and its like 115 out and my ac is blasting, somtimes the bugger just gets too hot also. When i drive up to flagstaff and/or back its gets too hot. I say too hot when it starts to break 210F I can always quickly recover from this by turning off a/c and blasting the heater, it drops below 200 every time. I think its just another CRD-ism and i dont think its a false read. Let me know if you find otherwise. Ive owned the vehicle long enough, in tx where it doesnt get that hot to belive if it was a mis-read it would happen whenever, and it tx too which it didnt ever get too hot there.

Endurance · **Posted:** Wed Jul 11, 2007 11:43 pm

There is a light that is supposed to come on when the engine overheats, Did any of you ever see that?

o8k · **Posted:** Thu Jul 12, 2007 12:35 am

i didnt, what temp is it supposed to come on at? can it be any more relyable than the SG or analog temp needle? So should i print out the tsb and go to the dealer? Thats like asking for a sharp stick in the eye isnt it? come to think of it, owning this CRD is like a sharp stick in the eye. Kinda reminds me of my last girl friend, (vodka induced rant ignor if you wish or read on...) Supa Fly hot pants tap that action, lots of fun to ride, go off roading ect ect. every trip worth its weight in gold, but i had to pay w/ platinum and she made my life miserable at every unexpected turn. I love my jeep, i hate what it does to me when im not looking =)

Metal Man · **Posted:** Thu Jul 12, 2007 4:10 am

The other day I had 213 on the scan gauge towing on hills A/C on and 93 outside. Gauge was straight up as always.

HIKJ · **Posted:** Thu Jul 12, 2007 4:16 am

My CRD is also overheating, when the engine has to work for an extended period of time at low speeds. That means it only happens when climbing long and steep mountain passes, or in the sand desert. The TSB has not solved the problem. A/C off and heater on is enough too cool down. I get the impression that the engine is equipped with insufficient cooling capacity.

oldnavy · **Posted:** Thu Jul 12, 2007 7:55 am

Now what, another problem to fix???

What next???

Metal Man · **Posted:** Thu Jul 12, 2007 10:19 am

I don't see mine as a problem , just passing on some info.
I've got over 20,000 good miles on mine.

Over Heating CRD?!

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