high radiator pressure - 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 02-20-2012, 09:03 PM   #1
Newb
 
Join Date: Jun 2010
Posts: 1
high radiator pressure

hello, i have an 97 wrangler sport with the 4.0l and 5 speed, i have been having problems with it leaking antifreeze. at first it was coming from around the lower hose at the radiator and the water pump,i have replaced them and the stat as well, the radiator is about a year old and does not appear to be coming from there. i did a pressure test on it and could not find the leak,i pumped it up and it stayed at the 18 psi for half an hour. what i did find was that when running the engine with the tester on it the pressure slowly(needle does not jump) went up over 30 psi, i am guessing at that pressure it would come out anywhere..it does not run hot stays around the 210 mark as usual, it runs great, does not miss or blow any antifreeze out the exhaust, i am thinking head gasket.although it does not have water in the oil or oil in the water. any ideas?

tracker is offline   Quote Quick Reply
Old 02-21-2012, 07:09 PM   #2
Jeeper
 
Join Date: Nov 2011
Posts: 717
Radiator Cap

The radiator cap should relieve the pressure at 15 psi. It sounds like the radiator cap is bad. You should be able to have it tested at an auto parts house.

ballistx is offline   Quote Quick Reply
Old 02-21-2012, 07:32 PM   #3
Newb
 
Join Date: Feb 2012
Posts: 5
Buy the t-stat adapter for your pressure tester and check the cap. Normally pressure will rise a little as the water/coolant heats up.
HBJ069 is offline   Quote Quick Reply
Old 02-21-2012, 07:44 PM   #4
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 30,887
Images: 2
The OE specified radiator cap is actually an 18 lb. model, it only starts relieving pressure at 18 lbs. If you're truly measuring higher than that, I'd suspect something with the radiator cap and replace it with another 18 lb. model. Excessive pressure can blow the lid or bottom off the radiator if it's really getting to 30 psi. I would double check that 30 psi reading, that seems unrealistically high for the cooling system.
__________________
When you have a choice, buy American.

Jerry Bransford 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


Similar Threads
Thread Thread Starter Forum Replies Last Post
High School Jeepers Thread Drakea94 Off-Topic 103362 07-11-2014 09:12 AM
Tire Pressure and Voltage Regulator vekrause TJ General Discussion Forum 4 03-15-2012 03:48 PM
2 New Oil Pressure Sensors Blown in 2 weeks--ya think it's me? brent in az YJ Tech Forum 6 02-21-2012 07:16 AM
Radiator fan problem Chris M JK General Discussion Forum 4 02-20-2012 08:46 PM
low oil pressure at idle on 99 Jeep wrangler Rusty Russ TJ General Discussion Forum 2 02-19-2012 11:25 AM


logo carid shop wrangler parts carid fender flares custom wheels store avs deflectors at carid
» Rates
Get low rates on auto insurance in Canada!

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 07:04 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