Cooling problems - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ 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 02-18-2014, 06:04 PM   #1
Jeeper
 
Jkilbert's Avatar
 
Join Date: Aug 2013
Location: McKeesport,Pa
Posts: 195
Send a message via Yahoo to Jkilbert
Cooling problems

I have a '92 with a 2.5 in it. I noticed that it was running hot, just below the red line. Checked the rad and found it to be low on coolant, it took only about a pint to fill it. Still was running a bit high so I changed the thermostat and radiator cap. Temp was still reading hightbut the upper hose and radiator are staying cold. Heater hoses are hot a fit blows hot. So next step was a new water pump and it's still doing the same thing. Tried another new t-stat with no change. So I thought maybe the rad was plugged so in goes another rad. Now temp is still up but not as much, around 230. Now top hose and radiator top get warm but not the rest of the rad. Something has to be plugged but I just can't get a handle on it...anybody have any suggestion of where to go next? It's not losing coolant or having the deadly milky oil but it's not building a lot of pressure.

Jkilbert is offline   Quote Quick Reply
Old 02-18-2014, 06:10 PM   #2
Jeeper
 
Join Date: Feb 2014
Location: Monroe, Or
Posts: 638
I would confirm it's not the sensor/gauge

Then try blowing it backwards to see if anything will dislodge. Hook a hose up and pressure it reverse flow.

Also check to make sure you have decent compression. My LT1 Camaro blew it's Head Gasket once. No milky oil, no drips, etc but I was running hotter than usual and using coolant. But there was no typical signs of a blown gasket. Only reason I replaced it was I happened to be running the engine and seen a TON of bubbles which is a sign.

__________________
1993 YJ 4.0, 5 Speed, 3.55 (for now)
2000 Durango 4.7, 5 Speed Auto, 3.92
TrailBlazing Gear Post
Project Ole Grey
Locruid is offline   Quote Quick Reply
Old 02-18-2014, 06:11 PM   #3
Jeeper
 
laredo's Avatar
 
Join Date: Jun 2013
Location: Near Warren, Ohio
Posts: 557
Maybe your coolant temp sensor is bad.
laredo is offline   Quote Quick Reply
Old 02-19-2014, 03:45 AM   #4
Jeeper
 
Jkilbert's Avatar
 
Join Date: Aug 2013
Location: McKeesport,Pa
Posts: 195
Send a message via Yahoo to Jkilbert
I thought about the temp sensor but that wouldn't explain why I'm not getting flow through the radiator. Top of the rad and hose gets hot, bottom of rad and hose doesn't. I'm not getting bubbles in the rad. Head/ gasket was one of my thoughts already. I'm just wondering if the new pump is actually a standard rotation pump instead of a reverse rotation.
Jkilbert is offline   Quote Quick Reply
Old 02-19-2014, 04:56 AM   #5
Jeeper
 
Beer Belly's Avatar
 
Join Date: Jan 2014
Location: over here, not over there.
Posts: 266
Quote:
Originally Posted by Jkilbert View Post
I thought about the temp sensor but that wouldn't explain why I'm not getting flow through the radiator. Top of the rad and hose gets hot, bottom of rad and hose doesn't. I'm not getting bubbles in the rad. Head/ gasket was one of my thoughts already. I'm just wondering if the new pump is actually a standard rotation pump instead of a reverse rotation.
That was my thought. The v-belt one, and the serpentine belt one are the exact same housing with different direction impellers. How long have you had it? If it was running fine then started acting up, most likely not the pump. If you bought it that way (running hot), the PO may have replaced it with the wrong one. Good luck.
__________________
'89 Yes it's a Junker, 2.5l, 5 speed. No A/C, no air bags, no coil springs, no radio, no GPS, No electric windows, no power seats, no carpet, no bluetooth, no back doors, no check engine light, no tpms, no automatic sway bar disconnect.
Beer Belly is online now   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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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




» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 05:39 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