What would cause this? - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > JK Jeep Wrangler Forum > JK Tech Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 02-11-2014, 02:16 PM   #1
Jeeper
 
Jkdune's Avatar
 
Join Date: Jan 2014
Location: SoCal
Posts: 134
What would cause this?

Hey guys, long time lurker, first time posting. I've searched this topic a lot, but I haven't found anyone with the same symptoms.

I bought my 13' Jkus last July. Recently (within the last couple months) I noticed when driving on the highway, uphill, the temp needle moves over to the right. Not quite to 3/4 but definitely past center. I checked the coolant bottle, below the min line. I couldn't take it In that day so I bought some OAT coolant from the dealer on my way to work at 60 dollars!!!!! Topped it off, took it in the next day.

Dealer pressure tested, said all was good. I figured that was the problem, maybe just spilled out while wheeling. Well the issue is back, engine running hot at highway speed and I noticed it slightly at low speed or idling as well. No visible leaks. Heater still works. No signs of coolant around the radiator cap, but I popped it and the fluid inside looks milky...

So.. Narrowed it down to casting sand, head gasket (or as I have read about the 12's a bad head) , or a leak somewhere. I'm taking it in tomorrow again to have it rechecked. I wish I would have noticed the milky fluid the first time but I didn't.

So any suggestions? What should I ask for when I go in? I feel like they should have noticed the milky fluid the first time so I want some points to bring up beforehand this time.

Thanks guys!

Btw I bought it in the summer, no overheat issues, now ambient temps in the 70's. And because it might help I have a tf 2.5 coil lift, rubi takeoff wheels and tires, winch bumper and winch. Speedo re calibrated with flashcal. I had the winch on before the heat issue started.

Jkdune is offline   Quote Quick Reply
Old 02-11-2014, 03:31 PM   #2
Jeeper
 
Join Date: Jul 2013
Location: Severna Park, MD
Posts: 316
Do a search for Bleed screw on the coolant system. I think there is a bleed screw that some of the jeeps had loose which caused this issue.

back in the game is offline   Quote Quick Reply
Old 02-11-2014, 03:51 PM   #3
Jeeper
 
2013 Moab's Avatar
 
Join Date: Jan 2014
Location: Sullivan Cnty, NY
Posts: 881
Why condemn those items when nothing was really checked except for leaks. Could be as simple as a stuck thermostat. It's under warranty and I'm sure they will get to the bottom of it.
2013 Moab is offline   Quote Quick Reply
Old 02-11-2014, 04:25 PM   #4
Jeeper
 
Jkdune's Avatar
 
Join Date: Jan 2014
Location: SoCal
Posts: 134
Quote:
Originally Posted by back in the game View Post
Do a search for Bleed screw on the coolant system. I think there is a bleed screw that some of the jeeps had loose which caused this issue.
I've never heard of that, I'll do a search. Would that cause milky looking coolant in the radiator? It seems in other vehicles at least that's usually a sign of oil I'm the coolant and a blown head gasket
Jkdune is offline   Quote Quick Reply
Old 02-11-2014, 04:28 PM   #5
Jeeper
 
Jkdune's Avatar
 
Join Date: Jan 2014
Location: SoCal
Posts: 134
Quote:
Originally Posted by 2013 Moab View Post
Why condemn those items when nothing was really checked except for leaks. Could be as simple as a stuck thermostat. It's under warranty and I'm sure they will get to the bottom of it.
The intention of the post was mainly to get information I could bring up to the service guys. They obviously didn't notice the milky coolant in the rad, so this time I want to be as proactive as possible when I talk to them. But fingers crossed this time they can get it solved
Jkdune is offline   Quote Quick Reply
Old 02-11-2014, 04:45 PM   #6
Jeeper
 
Old Dogger's Avatar
 
Join Date: May 2012
Location: THE NORTH POLE
Posts: 4,098
Milky coolant, and coolant temperature running hotter than normal, justifies a trip to the Dealer.
We can guess all day at the cause, head gasket, block, oil cooler, all of which are possibilities. If there is enough oil mixed in with the coolant, then it won't cool properly, because your cooling system won't be able to dissipate the heat properly, because of the oil contamination.

Make sure that they fix the cause of the issue, plus flushing out your cooling system, will be required.

Don't let them tell you that this is normal, because it is not.........
Old Dogger is offline   Quote Quick Reply
Old 02-11-2014, 04:47 PM   #7
Jeeper
 
Jkdune's Avatar
 
Join Date: Jan 2014
Location: SoCal
Posts: 134
Yeah I'm definitely going to make sure they flush the system at the very least. I guess I'll just see what they tell me and check everything before I leave this time.
Jkdune is offline   Quote Quick Reply
Old 02-12-2014, 01:27 PM   #8
Jeeper
 
Jkdune's Avatar
 
Join Date: Jan 2014
Location: SoCal
Posts: 134
Well at the dealer now. Tech says the coolant is not milky. They aren't going to flush it. So I asked about the issue with it running hot. The service writer didn't put any comments in about it running hot. So explained everything again to the tech. Waiting for more diagnostic checks I guess.

Anyone what does your coolant look like from the radiator cap? I guess my opinion of milky with particles floating at the top is different than others
Jkdune is offline   Quote Quick Reply
Old 02-12-2014, 01:45 PM   #9
Jeeper
 
wcbardwell's Avatar
 
Join Date: Nov 2012
Location: Rio Grande Valley
Posts: 601
Had mine running hot just like yours... I burped mine and all is well again... If you have a sloshing noise behind the dash on the passenger side when you do a cold start, from what I understand, it's a pretty good indication that you have air caught up in your system... Hope it helps!
wcbardwell is offline   Quote Quick Reply
Old 02-12-2014, 01:46 PM   #10
Jeeper
 
Join Date: May 2011
Posts: 2,469
Quote:
Originally Posted by Old Dogger View Post
Milky coolant, and coolant temperature running hotter than normal, justifies a trip to the Dealer.
We can guess all day at the cause, head gasket, block, oil cooler, all of which are possibilities. If there is enough oil mixed in with the coolant, then it won't cool properly, because your cooling system won't be able to dissipate the heat properly, because of the oil contamination.

Make sure that they fix the cause of the issue, plus flushing out your cooling system, will be required.

Don't let them tell you that this is normal, because it is not.........
Exactly, milky coolant could mean oil is mixing in with the coolant. It is hard to tell w/o actually seeing it. Temps can rise a little bit while the engine is under load, eg: driving up a steep grade until the electric fan kicks in. However higher than normal temps while cruising on a flat roadway is another story. It is the milky coolant that has me really concerned though. You have a warranty let them worry about it, just be certain they don't tell you it's normal as Old Dogger already suggested.
demarpaint is offline   Quote Quick Reply
Old 02-12-2014, 01:59 PM   #11
Jeeper
 
Jkdune's Avatar
 
Join Date: Jan 2014
Location: SoCal
Posts: 134
Thanks for the replies guys. So the tech said he checked the fan last time and it is turning on. So that's working. I'm pretty sure they burped it last time I was here, but I also haven't heard and trickling. The tech told me the coolant isn't milky. I'll see what the verdict is when he comes back. I'll snap a pic of the radiator coolant best I can later and see what you guys think. Buddy of mine has same year Jku with similar upgrades, his temp needle never budges on the same hills mine starts getting hot on.
Jkdune is offline   Quote Quick Reply
Old 02-12-2014, 03:53 PM   #12
Jeeper
 
Jkdune's Avatar
 
Join Date: Jan 2014
Location: SoCal
Posts: 134
Well verdict is.....they replaced the thermostat. Said it was "sticking" no flush. They said with the new 2013 fluid it's hard to tell what color it is and the fluid is fine. I really do hope this fixes it... I have a bad feeling it won't.
Jkdune is offline   Quote Quick Reply
Old 02-12-2014, 04:25 PM   #13
Jeeper
 
2013 Moab's Avatar
 
Join Date: Jan 2014
Location: Sullivan Cnty, NY
Posts: 881
Good luck, I hope that was the fix for you.
2013 Moab is offline   Quote Quick Reply
Old 02-16-2014, 11:19 PM   #14
Jeeper
 
Jkdune's Avatar
 
Join Date: Jan 2014
Location: SoCal
Posts: 134
update for anyone following this or future owners that might get the same problem.
Heat issue still there with the new thermostat. rising to about 3/4 mark at highway speeds.
Pulled some of the fluid that I thought looked milky, dealer was right. Once inside a clear container it looks okay.
Im not sure if it was there before or not but listened closely during cold start, and I do hear the water trickling sound behind the dash. I burped the system, didnt get too much air but I will see if that makes any difference.

Oh and the dealer forgot to put my engine cover back on so I have to go back regardless now, just sort of frustrating
Jkdune is offline   Quote Quick Reply
Old 02-16-2014, 11:39 PM   #15
Jeeper
 
MattK's Avatar
 
Join Date: Aug 2012
Location: Carlsbad, CA
Posts: 432
Quote:
Originally Posted by Jkdune View Post
Oh and the dealer forgot to put my engine cover back on so I have to go back regardless now, just sort of frustrating
They've done this twice at my dealership as well as not latch one side of the hood when they gave it back to me. Would have been real fun on the highway!

Just be that guy and pull it over to a parking spot and check under the hood before you drive away. Or just open the hood where they give it to you.
__________________
2013 Billet JKR
MattK is offline   Quote Quick Reply
Old 02-17-2014, 12:50 AM   #16
Jeeper
 
foolproof's Avatar
 
Join Date: Jan 2014
Location: Kingsville, MO
Posts: 180
is the original air dam still there, or did you take it off at some point? Not having it could possibly create some slight overheating problems like you describe. Just me $.02
foolproof is offline   Quote Quick Reply
Old 02-17-2014, 01:31 AM   #17
Jeeper
 
Jkdune's Avatar
 
Join Date: Jan 2014
Location: SoCal
Posts: 134
Quote:
Originally Posted by MattK View Post
They've done this twice at my dealership as well as not latch one side of the hood when they gave it back to me. Would have been real fun on the highway!

Just be that guy and pull it over to a parking spot and check under the hood before you drive away. Or just open the hood where they give it to you.
haha I will from now on!
Jkdune is offline   Quote Quick Reply
Old 02-17-2014, 01:32 AM   #18
Jeeper
 
Jkdune's Avatar
 
Join Date: Jan 2014
Location: SoCal
Posts: 134
Quote:
Originally Posted by foolproof View Post
is the original air dam still there, or did you take it off at some point? Not having it could possibly create some slight overheating problems like you describe. Just me $.02
I did take it off when I put the new bumper on. Bumper was on months before problem started. But thanks for the suggestion. Im open to anything right now
Jkdune is offline   Quote Quick Reply
Old 02-17-2014, 05:35 AM   #19
Jeeper
 
Old Dogger's Avatar
 
Join Date: May 2012
Location: THE NORTH POLE
Posts: 4,098
I see that you are in California. Like Phoenix where I live, we have had some warmer temperatures for at least the last month or so. My concern for you is what about this Summer, when it gets even hotter out.

Mine at 115 out mid-summer, does not go above the middle mark!

Getting back to basics, I would take it back to the Dealer, and have them go for a ride with you, and show them how your temp gauge reacts. It maybe just a faulty temperature gauge. Your Dealer should have a (infra red heat gun), as one of their diagnostic tools. Have them shoot the top radiator tank temperature, and see if it reflects what your gauge is showing. If it is 220, or less, then it is not a problem.

Did they test your radiator cap? Look at your overflow bottle when hot, and then see if the coolant drops to a lower level as it is drawn back into the radiator, as your engine cools down. The 2012 and 2013s have had some defective radiator caps. They now have a new design!

As for the Air Dam. I know that many like to take them off for Looks, and or MODS. I would like to take mine off and stubby bumper it, but I am not going to do it, because of the hot climate that I live in. Part of their design is to help increase air flow through your radiator, at highway speeds, by creating a pressure low, or venture effect, that will help to pull more CFM of air through you radiators cooling fins.
If there is a way that you can re-install it, then I would definitely try it!!!!!!!!!
Old Dogger is offline   Quote Quick Reply
Old 02-17-2014, 07:32 AM   #20
Jeeper
 
Join Date: May 2011
Posts: 2,469
I just went through something similar this weekend with a beater car we own. The temp gauge, which is nothing more than a glorified idiot light would come up a little over 1/4 of the way on the dash calibrations. I thought I needed a thermostat, which is a PITA on this car a 2000 Buick Century. I hooked up a scan tool after my wife had driven home from work about 40 minutes. The gauge was at the 1/4+ mark and the coolant temp at idle was 201F and heat coming out of the center vent on full blast was 160F. Ambient temps were about 30F. All readings were fine.

What I'm saying is this, see if you can get a code reader that shows, trim, coolant temp, engine rpms, timing, etc. Get an actual temperature reading from the scanner when your gauge reaches the 3/4 mark. You might have a perfectly functioning cooling system, or a problem, either way you'll know. Those gauges are nothing more than a glorified idiot light for lack of a better term.
demarpaint is offline   Quote Quick Reply
Old 02-17-2014, 08:08 AM   #21
Jeeper
 
Mojeaux's Avatar
 
Join Date: May 2012
Location: NC
Posts: 324
Read through the thread, but I may have overlooked it: Have you pressure flushed the coolant system yet? Complete coolant exchange, not just refilling.
__________________
Mojeaux is offline   Quote Quick Reply
Old 02-17-2014, 08:21 AM   #22
Jeeper
 
Join Date: Aug 2013
Posts: 25
I know you said that the dealership tested the fan, but when the car is running hot is the fan working?
scubadude is offline   Quote Quick Reply
Old 02-17-2014, 08:57 AM   #23
Jeeper
 
Join Date: Jun 2013
Location: Great White North
Posts: 260
Does your fan come on low at the proper coolant temperature or only at high when your engine gets really hot? The A/C will automatically cause it to go on high so you can turn the A/C on to see high speed.
WorkingMan is offline   Quote Quick Reply
Old 02-17-2014, 09:19 AM   #24
Jeeper
 
Jkdune's Avatar
 
Join Date: Jan 2014
Location: SoCal
Posts: 134
I see if I can throw the air dam on and see if it makes a difference. I will double check the overflow levels today for the cap. Also can someone tell me was it ever confirmed that the 2013's need 17 lb caps? Mine came with an 18. I read a few threads with people claiming these were wrong.

I do have a bluetooth obd II port and a tablet running torque. I'll get some numbers and post back
Jkdune is offline   Quote Quick Reply
Old 02-17-2014, 09:30 AM   #25
Jeeper
 
Kevlars's Avatar
 
Join Date: Jan 2013
Posts: 539
Quote:
Originally Posted by foolproof View Post
is the original air dam still there, or did you take it off at some point? Not having it could possibly create some slight overheating problems like you describe. Just me $.02
No ... Wrong.
__________________
------------------------------------------------------------
JKUR 2013,Teraflex 3 inch Lift,Teraflex Full 8 adj. arms
Elka Springs,Teraflex Front Monster Track bar,AEV Heat Reduction Hood,AEV Snorkel,SY-Clone Pre-Filter, AEV Front and Rear bumpers, Warn Zeon 10-S Winch, BFG 35 inch tires.
Kevlars is offline   Quote Quick Reply
Old 02-17-2014, 09:38 AM   #26
Jeeper
 
Kevlars's Avatar
 
Join Date: Jan 2013
Posts: 539
Quote:
Originally Posted by Jkdune View Post
I see if I can throw the air dam on and see if it makes a difference. I will double check the overflow levels today for the cap. Also can someone tell me was it ever confirmed that the 2013's need 17 lb caps? Mine came with an 18. I read a few threads with people claiming these were wrong. I do have a bluetooth obd II port and a tablet running torque. I'll get some numbers and post back
Ok I will tell you the temp gauge is highly and I mean HIGHLY in accurate. If your needle is in the middle (212/215) and your temp goes to 226/227 (normal as this is where the fan kicks on) so now your gauge is slightly above the middle line, all ok so far. After the fan finishes it's work and you are back down at 212/215...the needle still shows above the center mark.

Been driving me nuts...took my jeep in like you and they hooked the computer up...no issue.

I finally got an aero force gauge that hooks directly into the on board computer....now looking at my temp..never goes beyond 226 when the fan kicks on when wheeling. Around town on fwy 208 and in stop and go traffic. 215/219.


Do your self a favor get the gauge so you know for sure. The 2014 has it in the EVIC
__________________
------------------------------------------------------------
JKUR 2013,Teraflex 3 inch Lift,Teraflex Full 8 adj. arms
Elka Springs,Teraflex Front Monster Track bar,AEV Heat Reduction Hood,AEV Snorkel,SY-Clone Pre-Filter, AEV Front and Rear bumpers, Warn Zeon 10-S Winch, BFG 35 inch tires.
Kevlars is offline   Quote Quick Reply
Old 02-17-2014, 10:20 AM   #27
Jeeper
 
Jkdune's Avatar
 
Join Date: Jan 2014
Location: SoCal
Posts: 134
I will say when I'm wheeling I usually leave torque running and monitor the temp. I haven't seen it go above 226-228, however the gauge never went to the 3/4 mark either. I don't know why I never left it running while on the highway where it runs up to the 3/4 mark, but will definitely do that when I get off work.
I'm guessing even with the gauge being inaccurate the temps are going to be above 226 if 226 barely pushes my needle while wheeling
Jkdune is offline   Quote Quick Reply
Old 02-17-2014, 04:04 PM   #28
Jeeper
 
wcbardwell's Avatar
 
Join Date: Nov 2012
Location: Rio Grande Valley
Posts: 601
I know I've already said it and a whole lot of suggestions are getting out of hand... I'll say it again: burp it... I had the EXACT same issue... I burped my cooling system and all is well again...
wcbardwell is offline   Quote Quick Reply
Old 02-20-2014, 09:23 PM   #29
Jeeper
 
Jkdune's Avatar
 
Join Date: Jan 2014
Location: SoCal
Posts: 134
OK so ive since done some testing. I burped the jeep twice. Second time I didn't really get a lot of bubbles, close to none, but let it run for about 20 minutes for good measure. Did some temp checks with my tablet. Normal driving around town at about 78 degrees ambient the temp goes anywhere from 210 to 226.. it goes up to 226 while idling at some points then drops to about 224. Got up to 235 on the highway at 69 mph at 2900 rpm. The dummy gauge was about 5/8 at this point. Temp didn't drop until I decreased load. I didn't go up the stretch that causes the dummy gauge to go to 3/4 but I can only imagine how hot that is.

Was on the phone with the service manager, who has been awesome this entire time, he said to bring it back in so they can bleed the whole system and try that.

Back to square one I guess..
Jkdune is offline   Quote Quick Reply
Old 02-21-2014, 01:02 AM   #30
Jeeper
 
Kevlars's Avatar
 
Join Date: Jan 2013
Posts: 539
If you have slime in your overflow...it may have gotten into your water pump...don't know...

__________________
------------------------------------------------------------
JKUR 2013,Teraflex 3 inch Lift,Teraflex Full 8 adj. arms
Elka Springs,Teraflex Front Monster Track bar,AEV Heat Reduction Hood,AEV Snorkel,SY-Clone Pre-Filter, AEV Front and Rear bumpers, Warn Zeon 10-S Winch, BFG 35 inch tires.
Kevlars is offline   Quote Quick Reply
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler Forum 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 email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools

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 Off
Refbacks are Off




Download our Mobile App

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 06:15 AM.



Jeep, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC