radiator overflow catch can/tank? - Jeep Wrangler Forum
Jeep Wrangler Forum

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

Join Wrangler Forum Today

Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 04-09-2009, 06:23 PM   #1
ygohome's Avatar
Join Date: Dec 2005
Location: Louisiana
Posts: 1,428
radiator overflow catch can/tank?

I am looking to buy a new overflow tank for the new aluminum radiator we are installing in my jeep

I was looking on Summitracing and Jegs websites... for a simple idea of an overflow tank there sure are ALOT of options...

ventilated or not
vacuume or no
recirculating or not
drain valve or no drain valve
cap or sealed?

what is recommended? Should I get a recirculating tank? does it matter it if the input is on the top of the can or bottom? stuff like that I have no clue about.

Any help or recomendations would be appreciated.

I'm looking to spend a little extra coin to get something cool looking too. There's litterally hundreds of catch can to choose from but I want to get the right one.




Frank Bullitt (BULLZ)
April 2001 - Sept 2011
ygohome is offline   Quote Quick Reply
Old 04-09-2009, 06:53 PM   #2
ygohome's Avatar
Join Date: Dec 2005
Location: Louisiana
Posts: 1,428
I got my answer from another forum...

the way the stock overflow works is:

i know this is elementary to most of you but I never gave any of this a thought until now so its all new to me. I thought it was just magic.

single line from the radiator neck to the overflow tank. When the radiator pressure gets to a certain point (based on the pressure level of the cap) the cap open a trap door to let fluid overflow to the catch can.

the factory overflow has the line from the radiator enter near the bottom of the plastic catch can. and then when the radiator cools the vacuum from the radiator sucks that fluid from the overflow back to the radiator.

so, based on that understanding... i'd like a tank that has a cap on top (for refilling and checking the level)... but with the line going from the bottom of the tank.

the can doesn't need to be vacuum sealed since the line is under the water level of the tank. And doing it this way the tank recirculates the fluid automatically. I'm still not sure if it matters or not where I place the overflow... does it need to be mounted at a certain height in relation to the radiator cap?

Frank Bullitt (BULLZ)
April 2001 - Sept 2011
ygohome is offline   Quote Quick Reply

Quick Reply

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.
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email 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.

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
using aquarium net to catch flies Triple88a Off-Topic 17 09-21-2007 12:40 PM

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 08:33 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