Radiator Question(s) - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ General Discussion Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 12-16-2012, 05:01 AM   #1
Newb
 
Join Date: Dec 2012
Posts: 9
Question Radiator Question(s)

Hi, Decided to do a radiator flush this morning after noticing that the expansion tank do not retain any coolant despite filling up on numerous times during the last couple of months...no visible leaks and no sign of overheating according to the temperature gauge...
First question:
The radiator cap was replaced about 2 years ago, is it the correct one, 18lbs..

Also, at the bottom of the radiator there are 2 "valves" what will their purpose be? (Only one shown next to the drainplug- rubber cover removed)
Attached Thumbnails
Click image for larger version

Name:	Wrangler'98 Radiator Cap.jpg
Views:	33
Size:	53.4 KB
ID:	187988   Click image for larger version

Name:	Wrangler'98 Radiator Drainplug.jpg
Views:	31
Size:	34.1 KB
ID:	187989  


ZATJ is offline   Quote Quick Reply
Old 12-16-2012, 05:21 AM   #2
Jeeper
 
Join Date: Sep 2011
Location: Delaware
Posts: 178
Quote:
Originally Posted by ZATJ View Post
The radiator cap was replaced about 2 years ago, is it the correct one, 18lbs..
18lbs is correct.

Quote:
Originally Posted by ZATJ View Post
Also, at the bottom of the radiator there are 2 "valves" what will their purpose be? (Only one shown next to the drainplug- rubber cover removed)
I am going to assume your Wrangler is a stick, correct?
The "valves" you are referring to are actually nipples... There is a cooler built into the radiator where the automatic transmission would connect to. These are not used with a standard shift transmission (My guess is that a previous owner replaced the radiatior (most non-OEM replacement radiators come with the cooler built in). You can ignore these connections.

If your Wrangler is an automatic, I would hope that there is an auxiliary cooler hooked up in place of using the radiator transmission cooler!

Hammond_Egger is offline   Quote Quick Reply
Old 12-16-2012, 05:33 AM   #3
Jeeper
 
Shelby427's Avatar
 
Join Date: May 2011
Location: Lakeland FL and Hooversville PA
Posts: 2,095
Howdy ZATJ welcome to the forum.

Yep right cap.

Those are the fittings for an automatic transmission cooler. It's built internal into the radiator. Guessing you have a standard transmission, and somewhere along the line the radiator was replaced with a "fits all" type. If so it's not used.

But if you have an automatic trans, hopefully it has a separate cooler added somewhere as the cooler is a must for any kind of life for your transmission.

Keep a close eye on the leak, you have one. If you have the 4.0 engine, some were known to crack the head between #3 and #4 cylinders. This will cause a small leak that you won't see on the outside. Pop the cap off the valve cover and look for any type of milky looking oil.

Other then that, could be something as simple as a tiny leak on the outside that evaporates quickly. Had one like that. The solder joint on the top bracket of the radiator had cracked. Tiny amount of coolant would leak out, but evaporate from the heat of the radiator. Only found it when I saw a stain on the side of the radiator.

Pressure tested it and there it was. Wasn't a bad fix, cleaned off the spot, and resoldered it.

Best of luck!
__________________
97 Sahara, 74 Renegade, 72 CJ5, 55 Willy's (the Beast) Boss 302, 6:34 gearing, Bose 901 speakers.
God I miss that Jeep. Forgot the kinda Jeep, 80 SX4.
Shelby427 is offline   Quote Quick Reply
Old 12-16-2012, 05:44 AM   #4
Newb
 
Join Date: Dec 2012
Posts: 9
Thks Hammond, appreciated. Nope, the TJ is a "stick". Have also just added another 500ml of coolant after a short drive. Quite a relief to hear that the cap is correct one! Could not manage to undo the drainplug on the block, would seem that I will need to modify one of my existing Allen key, somewhere between 7 and 8mm? Sorry, this part of the woods everything is metric...
ZATJ is offline   Quote Quick Reply
Old 12-16-2012, 06:35 AM   #5
Newb
 
Join Date: Dec 2012
Posts: 9
Thks Shelby, Did a bit of closer inspection and found that the gasket at the waterpump is being "pushed" out, also the gasket between the waterpump and block is very "brittle"...sorry the quality of the photograph is not very clear, don't worry about the brown, leftovers from last week's trip.
Would it be feasible just to replace the gasket...?
Attached Thumbnails
Click image for larger version

Name:	Wrangler'98 Waterpump Leak.jpg
Views:	37
Size:	164.5 KB
ID:	187999  
ZATJ 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:
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 05:15 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