Where does your temp gauge usually settle? - JeepForum.com
Reply
 
LinkBack Thread Tools
post #1 of 22 Old 08-29-2020, 03:56 PM Thread Starter
clemsonscj
Registered User
1930  
 
Join Date: Mar 2014
Location: Anderson
Posts: 464
Where does your temp gauge usually settle?


Iíve had a small crack in the top of my radiator on the driver side for a while now and it causes my levels to be a little low all the time, but even in the summer heat this tends to be where it settles. Until earlier today I noticed it got up to about the 1/2 mark on my way home. Then just now driving to the in-laws it started fluctuating between the 1/2 and 3/4 mark which scared me so I turned around and put some distilled water I had at the house in it. Put a gallon in and now itís staying in this same spot. Would that little bit of water have caused it to overheat that easily?

And when I say fluctuate, it was like steadily going back and birth between 1/2 and 3/4 within seconds.


'09 GC Overland 5.7L QDII; OME HD Lift; 265/70R17 Ridge Grapplers; SC Flashpaq
Black WK Club #134
clemsonscj is offline  
Sponsored Links
Advertisement
 
post #2 of 22 Old 08-29-2020, 06:49 PM
beemer9
Registered User
2008 XK Commander 
 
Join Date: Apr 2009
Location: Colorado
Posts: 101
My 2008 XK 4.7 runs maybe 1 mark higher than your picture, but below half way all the time. It's rock steady.
If you're seeing swings in the temp gauge, it could be showing you're really low on coolant.
Cooling systems are designed to run under pressure. If you have a cracked radiator top tank you have no pressure plus you lose fluid. If you had to add 1 gal that's a substantial amount.
The 4.7 and 5.7 engines are known for dropping valve seats if the engine gets too hot. The heads are the hottest part of the engine.
You're risking thousands of dollars in engine repair costs vs replacing the radiator.
beemer9 is offline  
post #3 of 22 Old 08-29-2020, 09:22 PM
nvrdone1
Registered User
2007 WK 
 
Join Date: Sep 2014
Location: duvall
Posts: 654
my 07 5.7 temp has allways run right below the 1/2 mark. except when the impeller came loose inside the water pump
nvrdone1 is offline  
 
post #4 of 22 Old 08-31-2020, 02:06 PM
HEMI426
Registered User
2008 WK 
 
Join Date: Jan 2018
Posts: 104
2008, 5.7, 1 marker higher than you.
HEMI426 is offline  
post #5 of 22 Old 08-31-2020, 05:50 PM
LouC
Registered User
2007 WK 
 
Join Date: Feb 2008
Location: NY
Posts: 2,892
I would fix that rad right away, you're most likely getting air in the coolant causing that. You don't want to overheat these engines with the aluminum heads, they are not like the old cast iron 4.0s that can take a beating.

2017 JK Unlimited Sport 6 spd
2007 WK Limited Hemi QDII
1998 ZJ Laredo 4.0 Selectrac
LouC is offline  
post #6 of 22 Old 08-31-2020, 06:53 PM
90grandoneer
Moderator
 
90grandoneer's Avatar
2006 WK 
 
Join Date: Apr 2008
Location: City of Trees
Posts: 4,002
Where have you been hiding, Lou? We've missed you.....at least some of us, LOL.

06 GCO, Dk Khaki, QDII, Flshing Hi 3rd Bk Lt, MDS "ON" Lt, Airtab Vortex Gens, Debadged, Fumoto Drain Valve, BT Catch Can, Chopped EGR Tube, SRT8 CAI, AFE Air Filter, 6spd 545RFE, Sonnax Trans Line Press Booster, SC Tuner W/Adv Trans Tune App, DS and HP tuners, Transgo Shift Kit, ARH Long Tube Hdrs w/3 in Magnaflow/Xlerator AP Exh Sys, Bilsteins, SRT Springs/Sways, Cust Eng Cvr, SRT8 frt/rear bumpers, FRI Sidewinder Cam w/6* advance/6.1 valvetrain, SLP 25% UD Pulley, BBK true 90mm T-Body, SOS Ign Coils w/.060 spark plug gaps, TEA ported/milled heads w/new valve seats, SRT Reps with 265/45&295/40X20's. Also 05 Hemi LX modded exactly like WK and Comp Cammed 06 300CSRT8.
90grandoneer is online now  
post #7 of 22 Old 08-31-2020, 06:57 PM Thread Starter
clemsonscj
Registered User
1930  
 
Join Date: Mar 2014
Location: Anderson
Posts: 464
Trust me I havenít been putting it off out of laziness. I have bought everything I need from the radiator, fluids, and gonna do the thermostat too while Iím in there so got that too. Have had it for 2 months but from the videos Iíve watched itís an all day ***** if a job so I havenít had a single day where I had the full day free to mess with it.

'09 GC Overland 5.7L QDII; OME HD Lift; 265/70R17 Ridge Grapplers; SC Flashpaq
Black WK Club #134
clemsonscj is offline  
post #8 of 22 Old 09-01-2020, 07:53 AM
Capital AL
Registered User
2010 WK 
 
Join Date: Feb 2019
Posts: 28
Garage
My 3.7 always runs 1-2 lines below half.
Capital AL is offline  
post #9 of 22 Old 09-01-2020, 12:20 PM
caulk04
Registered User
2008 WK 
 
Join Date: Jan 2013
Location: Greenville
Posts: 3,449
The rad job isn't that bad, honestly.

Just pull the rad fan assembly out, drain the system. You'll need at least a full quart of the fluid, best to get two and have extra. Once that fan assy is out of the way, the job is no battle.

08 Limited Hemi - wheels, tires, springs...ya know, stuff
caulk04 is offline  
post #10 of 22 Old 09-01-2020, 02:31 PM
beemer9
Registered User
2008 XK Commander 
 
Join Date: Apr 2009
Location: Colorado
Posts: 101
It's VERY important to bleed the cooling system properly. Here are the instructions if you need them. And make sure you're using the right antifreeze. HOAT
Attached Files
File Type: pdf 1.pdf (2.75 MB, 9 views)
beemer9 is offline  
post #11 of 22 Old 09-02-2020, 12:22 PM
powerstroke01
Registered User
 
powerstroke01's Avatar
2005 WK 
 
Join Date: Jan 2004
Location: Ahwahnee
Posts: 613
RIght at half unless going up our steep mountain roads

Jeepers do it in the mud. ;)
powerstroke01 is offline  
post #12 of 22 Old 09-04-2020, 10:43 AM
toxic0n
Registered User
2005 WK 
 
Join Date: Mar 2019
Posts: 32
My '05 5.7 usually sits exactly where yours does, which is around 96 C.

On hotter days in traffic, it may go up to the middle mark which is around 103C.

One extremely hot day when I was crawling uphill on an old forestry road at like 10 km/h and the gauge started creeping towards the 3/4 mark at 110C.



These things run a bit too hot for my liking, I much prefer my BMW's operating temp of 87c and it never goes past 100. Also why the hell is the normal temp not exactly at the 1/2 mark like most vehicles?
toxic0n is offline  
post #13 of 22 Old 09-04-2020, 03:23 PM
rkins
Registered User
2008 WK 
 
Join Date: Mar 2018
Location: Sarasota
Posts: 18
Quote:
Originally Posted by beemer9 View Post
My 2008 XK 4.7 runs maybe 1 mark higher than your picture, but below half way all the time. It's rock steady.
If you're seeing swings in the temp gauge, it could be showing you're really low on coolant.
Cooling systems are designed to run under pressure. If you have a cracked radiator top tank you have no pressure plus you lose fluid. If you had to add 1 gal that's a substantial amount.
The 4.7 and 5.7 engines are known for dropping valve seats if the engine gets too hot. The heads are the hottest part of the engine.
You're risking thousands of dollars in engine repair costs vs replacing the radiator.
X2 for my '08 WK Hemi. Sometimes if I let it idle for a while while I'm waiting for someone (live in FL and it's hot here) it will be one tick from center. I just had my radiator replaced and AC repaired (dash removal).
So yours look pretty normal.

Rick
------------------------
'08 WK Overland
rkins is offline  
post #14 of 22 Old 09-04-2020, 03:35 PM
rkins
Registered User
2008 WK 
 
Join Date: Mar 2018
Location: Sarasota
Posts: 18
Quote:
Originally Posted by beemer9 View Post
My 2008 XK 4.7 runs maybe 1 mark higher than your picture, but below half way all the time. It's rock steady.
If you're seeing swings in the temp gauge, it could be showing you're really low on coolant.
Cooling systems are designed to run under pressure. If you have a cracked radiator top tank you have no pressure plus you lose fluid. If you had to add 1 gal that's a substantial amount.
The 4.7 and 5.7 engines are known for dropping valve seats if the engine gets too hot. The heads are the hottest part of the engine.
You're risking thousands of dollars in engine repair costs vs replacing the radiator.
X2 for my '08 WK Hemi. Sometimes if I let it idle for a while while I'm waiting for someone (live in FL and it's hot here) it will be one tick from center. I just had my radiator replaced and AC repaired (dash removal).
So yours look pretty normal.

Rick
------------------------
'08 WK Overland
rkins is offline  
post #15 of 22 Old 09-04-2020, 11:50 PM
NevadaWheeler
Registered User
2005 WK 
 
Join Date: Nov 2019
Location: Reno
Posts: 60
Definitely get your radiator fixed asap. I'm sure a whole gallon is enough to cause the issue you had and possibly ruin the engine if you keep running it that way, as beemer9 said. My '05 WK 5.7 runs 1 tic below center. The only times I remember seeing it higher was when the power steering pump went out, then it overheated almost immediately if you weren't traveling at highway speed.

If you need to disconnect the hydraulic lines to get the radiator out (I think you do) you will need to bleed the power steering as well. You will need a vacuum pump and power steering reservoir adapter for that. (I got the Mityvac MV8000 which has the adapter) Also, you said you got fluid, hopefully you got MS-10838 spec stuff. The first dealership I went to tried to give me ATF +4, even after I told them it needed MS-10838. The ATF +4 will ruin the seals and bearings in the hydraulic fan.

Brizz


'05 WK 5.7 QDII, stock
NevadaWheeler 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