3.6 operating temps? - JeepForum.com
 1Likes
Reply
 
LinkBack Thread Tools
post #1 of 34 Old 08-26-2021, 11:15 AM Thread Starter
dtrkyman
Registered User
2013 WK 
 
Join Date: Feb 2012
Location: Santa Fe
Posts: 445
3.6 operating temps?

I have a 13 with 165k now, seems it may be running a little warmer than it had in the past. I never really looked at the evic temp just the gauge, seemed it used to run closer to the 1/4 mark and now runs closer to the middle.

Since noticing this, had a code for the thermostat opening too soon or something like that, I started monitoring the evic temps.

When it is 208-210 seems it is close to that 1/4 mark on the other gauge, once it is closer to 220 it is just shy of half way. I seem to be running 219 or so on average. Even after a fluid flush and change which is a whole other can of worms!

So what temp you running at?

dtrkyman is offline  
Sponsored Links
Advertisement
 
post #2 of 34 Old 08-26-2021, 12:53 PM
Bilko
Registered User
2012 WK 
 
Join Date: Nov 2018
Posts: 771
Did you swap the thermostat? Opening too early should result in lower temps. The code pops if the engine doesn't warm up within a preset time period. The thermostats should in theory fail in an open configuration but it's worth checking. It is a very easy repair and the housing including the thermostat are only about $35. Get a MOPAR or Mahle replacement rather than any no-name options.
Bilko is offline  
post #3 of 34 Old 08-26-2021, 01:15 PM
ColdCase
My Reality Check Bounced
 
ColdCase's Avatar
2011 WK 
 
Join Date: Sep 2009
Location: New England
Posts: 18,277
Yeah, if you didn't replace the thermostat, it could be sticking. Sometimes open (fault code) sometimes not opening fully (higher than normal temperatures).

I just got lost in thought. It was unfamiliar territory;
Current: 2011 Grand Cherokee Overland V8, 2009 Liberty Rocky Mt V6
Previous: 2000 Grand Cherokee Laredo I6, 1979 CJ7 I6 Quadratrac
ColdCase is offline  
 
post #4 of 34 Old 08-26-2021, 01:24 PM Thread Starter
dtrkyman
Registered User
2013 WK 
 
Join Date: Feb 2012
Location: Santa Fe
Posts: 445
Thermostat replaced. Not sure what brand, friends shop did it. No codes.
dtrkyman is offline  
post #5 of 34 Old 08-26-2021, 01:52 PM Thread Starter
dtrkyman
Registered User
2013 WK 
 
Join Date: Feb 2012
Location: Santa Fe
Posts: 445
Maybe just get an oem thermostat? Probably should clean all the old mud and junk of the motor, can't be helping it cool!
dtrkyman is offline  
post #6 of 34 Old 08-26-2021, 10:53 PM Thread Starter
dtrkyman
Registered User
2013 WK 
 
Join Date: Feb 2012
Location: Santa Fe
Posts: 445
Hosed out the exterior of the radiator, checked air filter. No change, not getting close to overheating so not too worried. Drove a couple hours back and forth this evening. Temp averages 213-219, went to 230 climbing a hill at 80mph, dropped down to 219-222 fairly quick.

The 230 seems a bit high but is basically dead middle of analog gauge.
dtrkyman is offline  
post #7 of 34 Old 08-28-2021, 10:32 AM
Jurassic_Jeep
Registered User
2014 WK 
 
Join Date: Nov 2014
Location: Edmonton
Posts: 543
yeah, the middle is a bit high for the 3.6L especially if you are driving.

But like you, normal temps for my 3.6 is just slightly above the 1/4 line. The only time when I see the temp gauge move is up to slightly below the 1/2 mark, and that us when im driving in a parking lot for like 20 minutes at low speed. The the fan kicks in and the temps drop back down to slightly above the 1/4 again. It never moves above the to slightly above the 1/4 mark when driving normally.

Have you considered a full system coolant flush? Wonder if there is indeed some blockage in somewhere, maybe even check to see if there are cold spots on the radiator (if that is even possible) with laser temperature gun etc.

2014 Jeep Grand Cherokee Summit 4x4 3.6L V6.
Jurassic_Jeep is offline  
post #8 of 34 Old 08-28-2021, 12:01 PM
scott_0
Registered User
 
scott_0's Avatar
2002 WJ 
 
Join Date: Aug 2016
Location: Oxford
Posts: 212
Quote:
Originally Posted by dtrkyman View Post
Hosed out the exterior of the radiator, checked air filter. No change, not getting close to overheating so not too worried. Drove a couple hours back and forth this evening. Temp averages 213-219, went to 230 climbing a hill at 80mph, dropped down to 219-222 fairly quick.

The 230 seems a bit high but is basically dead middle of analog gauge.
there is definitely an issue, I wouldn't drive it like that much longer, a thermostat job isn't huge, just take care of it

2018 GC Limited
scott_0 is online now  
post #9 of 34 Old 08-28-2021, 07:13 PM Thread Starter
dtrkyman
Registered User
2013 WK 
 
Join Date: Feb 2012
Location: Santa Fe
Posts: 445
3.6 operating temps?

New thermostat and complete flush.

Probably swap to own thermostat if it persists.

I saw a thread on a jk forum saying the 3.6 runs warm, mine never did! Though I never used to look at actual temp.

The 230 was on a climb in the mountains but nothing crazy.


Sent from my iPhone using Tapatalk
dtrkyman is offline  
post #10 of 34 Old 08-28-2021, 08:35 PM Thread Starter
dtrkyman
Registered User
2013 WK 
 
Join Date: Feb 2012
Location: Santa Fe
Posts: 445
Case Number: S1324000004
Release Date: 2/12/2013
Symptom/Vehicle Issue: Vehicle Temperature Gauge Reads Hot
Discussion:
Engineering has determined the gauge is reading higher than design intent. If this is the customers
complaint, review the below operating parameters. This condition is being investigated by
Engineering.
Some customers may comment the temperature gauge appears to read hot or above the half way
point in its travel. The thermostat is designed to open at 221F, resulting in an Engine operating
temperature of 230F. Verify the vehicle is operating at no more that 230F with the wiTECH tool, and
that no codes are present before releasing the vehicle to the customer.

Found that on a wrangler or ram forum, seems like normal temps, though I still believe mine is running warmer than before?
dtrkyman is offline  
post #11 of 34 Old 08-28-2021, 11:23 PM
ColdCase
My Reality Check Bounced
 
ColdCase's Avatar
2011 WK 
 
Join Date: Sep 2009
Location: New England
Posts: 18,277
Thermostat failing shut is the normal long term mode of failure.

A higher than routine temperature reading is often the first sign of a head gasket leak.

A bad coolant temperature sensor has caused many to chase down thermostat and other non existent cooling problems.

The temperature sensor is a two-wire Negative Thermal Coefficient (NTC) sensor. Meaning, as engine coolant temperature increases, resistance (voltage) in the sensor decreases. As temperature decreases, resistance (voltage) in the sensor increases.

I just got lost in thought. It was unfamiliar territory;
Current: 2011 Grand Cherokee Overland V8, 2009 Liberty Rocky Mt V6
Previous: 2000 Grand Cherokee Laredo I6, 1979 CJ7 I6 Quadratrac
ColdCase is offline  
post #12 of 34 Old 08-29-2021, 08:51 AM Thread Starter
dtrkyman
Registered User
2013 WK 
 
Join Date: Feb 2012
Location: Santa Fe
Posts: 445
Head gasket leak cause low coolant I assume? Mine had the original coolant with 165k and the rad. was full still and the overflow was between the fill line and full line. Do not know of anyone adding fluid over that time.

So after the thermo change and all that time very little coolant was gone, rule out head gasket?

Could the fact I am getting high on miles contribute to running warmer? Bad temp sensor should throw a code?
dtrkyman is offline  
post #13 of 34 Old 08-29-2021, 11:41 AM Thread Starter
dtrkyman
Registered User
2013 WK 
 
Join Date: Feb 2012
Location: Santa Fe
Posts: 445
After a few days driving my coolant is still full in Rad. and almost down to half way between the fill and fill line, normal?
dtrkyman is offline  
post #14 of 34 Old 08-29-2021, 01:45 PM
ColdCase
My Reality Check Bounced
 
ColdCase's Avatar
2011 WK 
 
Join Date: Sep 2009
Location: New England
Posts: 18,277
The sensor will throw a code if open or shorted or it can cause a low temperature code if its out of range or a high reistance due to electrical corrosion. I don't think it throws a code for high temp.

With that mileage you could have some passages beginning to be blocked and coolant is not being cooled as efficiency, The flush could have stirred things up. Perhaps the heater core is partially blocked. Flushing won't clean these out completely, you change the coolant basically because its anti-corrotion properties wear out.

I just got lost in thought. It was unfamiliar territory;
Current: 2011 Grand Cherokee Overland V8, 2009 Liberty Rocky Mt V6
Previous: 2000 Grand Cherokee Laredo I6, 1979 CJ7 I6 Quadratrac
ColdCase is offline  
post #15 of 34 Old 08-29-2021, 08:34 PM
jeepsgofaster
Registered User
 
Join Date: Jun 2019
Posts: 22
Run a close eye over the trans cooler / AC condenser that there's not a bunch of grass seeds, bugs or bent find impeding air flow.

Sent from my CPH1921 using Tapatalk
dtrkyman likes this.
jeepsgofaster is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome