06 TJ says 210 deg but engine bay feels too hot - Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ Tech Forum

Join Wrangler Forum Today

Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 06-05-2013, 08:39 AM   #1
Join Date: Jun 2013
Posts: 7
rooby is on a distinguished road
06 TJ says 210 deg but engine bay feels too hot

Friend recently got a 2006 TJ Unlimited (LJ) with 82k miles, temp gauge says 210, but if you open the hood the engine bay feels very hot. You can't even touch the two metal support/stiffener rods that run at an angle from radiator area to firewall area. And don't even think about touching anything on the motor.

Is this normal? Jeep seems to run just fine. I don't know when the last coolant flush was done or what condition the coolant is in, and haven't checked into the thermostat, as the gauge still reads 210.

What's the easiest way to read the coolant temp (other than relying on the gauge) immediately after shutting down the motor?
rooby is offline   Quote
Old 06-05-2013, 08:52 AM   #2
MarkGLHS's Avatar
Join Date: Aug 2012
Location: Ellington, Connecticut
Posts: 1,448
MarkGLHS is on a distinguished road
210 is the normal operating temp for your 4.0L engine. I do not know of any vehicle that runs at 210 degrees F where the engine bay would not be too hot to touch in certain areas with your bare hands after it has been running a long time w/ the hood shut.

The only way to confirm your stock gage's reading is to install an additional, calibrated coolant temp sensor/gage, but I do not think that is necessary.

It's never a bad idea to flush and re-fill a cooling system on a used vehicle if you are not sure of the maintenance history, but based on your post, sounds like your Jeep cooling system is fine.

2002 Wrangler Sahara, all stock, 5-speed, Dana 44, dual tan tops, 2nd owner.

2008 Hemi Grand Cherokee Limited 4X4, Quadradrive II, original owner, 24,000 miles.
MarkGLHS is offline   Quote
Old 06-05-2013, 08:53 AM   #3
UnlimitedLJ04's Avatar
Join Date: Aug 2010
Posts: 8,815
UnlimitedLJ04 is on a distinguished road
fairly normal. cat converters may be clogged up/breaking down, but that should present itself with CEL. my underhood engine temps got very hot when pre-cats were going bad.
UnlimitedLJ04 is offline   Quote
Old 06-05-2013, 09:00 AM   #4
SuperTJ's Avatar
Join Date: Mar 2013
Location: Waleska GA
Posts: 4,191
SuperTJ is on a distinguished road
I have an 06 LJ and it is very hot under the hood. The 4.0 just runs hot.
SuperTJ is online now   Quote
Old 06-05-2013, 09:04 AM   #5
Motorized toy collector

WF Supporting Member
TJDave's Avatar
Join Date: Nov 2008
Location: Eastern WA State
Posts: 3,513
TJDave is on a distinguished road
Yep. The modern 4.0 is happiest at 210. Mine reads just a hair below the 210 mark, even after cutting big holes in the hood and installing a vented hood louver. But, I can feel tons of heat escaping out those vents now. Even though the motor is happy, everything else around it can't be. I am hoping the louver will help take away some of the heat soak trapped under the hood.
TJDave is offline   Quote
Old 06-05-2013, 10:48 AM   #6
Knows a couple things...

WF Supporting Member
Jerry Bransford's Avatar
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 42,037
Jerry Bransford is on a distinguished road
That temp is uncomfortable for humans but for not the steel, plastic, & rubber components inside the engine compartment. Just like like the axle pumpkins are too hot to touch for more than a split second but everything inside is perfectly happy.

So what may feel too hot to a human isn't too hot for those types of items. We humans just have a very narrow comfort range of temperatures.
When you have a choice, buy American.
Jerry Bransford is online now   Quote
Old 06-05-2013, 02:12 PM   #7
Join Date: Jun 2013
Posts: 7
rooby is on a distinguished road
This all sounds encouraging... thanks.

rooby is offline   Quote

coolant , running hot , temperature

Thread Tools

Posting Rules
You may not post new threads
You may not 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

» Featured Product

All times are GMT -5. The time now is 05:10 PM.

User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.

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
« Back

Enter your email address:

Delivered by FeedBurner