help with 89 overflow tank leak -
LinkBack Thread Tools
post #1 of 5 Old 04-27-2005, 10:28 AM Thread Starter
Registered User
Join Date: Nov 2004
Posts: 19
help with 89 overflow tank leak

I have a 89 cherokee with the plastic overflow tank. About had to buy a new one becouse the original had a small leak around the hose neck so i bought a new one at car quest. Well the new tank leaks from the side and the cap area. So i bought a new cap and it still leake?? any ideas on what it can be?? The jeep runs fine and cool

eas020223 is offline  
Sponsored Links
post #2 of 5 Old 04-27-2005, 10:36 AM
Registered User
XJ-NoDough's Avatar
Join Date: Nov 2003
Location: Four corners--Eugene, Oregon
Posts: 1,685
It's a poor design, to start with IMO. I also have an '89 , but I think this issue is one most of has been victim to one way or another. Mine leaks from the cap on the "pressure tank". When I bought it from my buddy, he mentioned that he had replaced the tank several times, from it splitting wide open. You might want to have a look at, look under "technical" then click "engine" and "budget cooling upgrade (Closed to Open)". I'm seriously thinking about performing this on mine.

Have you burped the cooling system? Ie. gotten all the air out of it, because the air will expand alot farther than the coolant at raised temps. thus forcing coolant out where ever it can find a path.

'89 XJ Limited
204,XXX miles
Leather, Loaded

4L Selec-trac
3"-4.5"ish Homebrew lift
16x8 MB Motoring Rockers
265/75R16(31ish"X10.4") Goodyear Wrangler M/TRs
Trimmed w/ Bushwackers
Stock 3:55 gears

sans big audio
Homebrew intake w/cone filter
"Some people are like a slinky... Not really good for anything, but you still can't help but smile when you see one tumble down the stairs." :my dad
XJ-NoDough is offline  
post #3 of 5 Old 04-27-2005, 10:51 AM
Registered User
Join Date: Nov 2004
Location: USA
Posts: 2,317
^^^What he said^^^
Somebody should come up with an aftermarket metal tank reservoir.
cmotsvt is offline  
post #4 of 5 Old 04-27-2005, 11:08 AM
Registered User
90lerado's Avatar
Join Date: May 2003
Location: Manchester
Posts: 1,096
they have metal tanks i forget who sells trhem tho. what i did when mine leaked at the hose bung is i cut it smooth and added a fitting to it and it worked. as far as the cracking, jb weld is your friend lol.

"Few men are killed by the bayonet, many are scared by it. Bayonets should be fixed when the fire fight starts"
- General George Patton Jr, "War as I knew it" 1947

Wife's/my vehicle: 06 Pontiac vibe awd
Hopefully a jeep sometime in the future
90lerado is offline  
post #5 of 5 Old 04-27-2005, 12:16 PM
Registered User
Koenig's Avatar
Join Date: Aug 2002
Location: Port Moody, British Columbia, Canada.
Posts: 174
My 88 XJ would also leak out of the plastic overflow. I found that if I didn't tighten the cap AS hard that it would leak a lot less or not at all. I think by over-tightening, the cap lost it's ability to release built up pressure. Just a thought, but give it a try it before replacing the bottle!

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

~147,000km, 4.0l, AW4, K&N custom cone intake,
Dark Cordovan Pearl Metallic in color, 4 Dr. w/ chrome trim.
Koenig is offline  

Quick Reply

Register Now

In order to be able to post messages on the forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.

Email Address:


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.

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

Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
1987 Cherokee Overflow tank Skaf XJ Cherokee Technical Forum 16 05-12-2013 06:35 PM
Coolant pouring out of my overflow tank jwiowa XJ Cherokee Technical Forum 7 12-19-2009 11:27 AM
Overflow tank boiling over. MSH5337 XJ Cherokee Technical Forum 12 01-08-2009 06:28 PM
overflow bottle leak? xlr84fun XJ Cherokee Technical Forum 0 06-14-2008 10:58 AM
how to fix leaking overflow tank? eas020223 XJ Cherokee Technical Forum 4 02-06-2005 02:36 PM

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