Excessive coolant pressure???? - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Wrangler Forums > YJ Wrangler Technical Forum > Excessive coolant pressure????

Introducing MONSTALINERô UV Permanent DIY Roll On Bed LineGrizzly Lockers available at Rockridge4wd.comThe ULTIMATE "Selectable" Locker System! Brough

Reply
Unread 10-23-2011, 08:09 AM   #1
eeeep10
Registered User
1994 YJ Wrangler 
 
Join Date: Aug 2011
Location: oxford, nc
Posts: 12
Excessive coolant pressure????

I seem to be running a really high coolant pressure in my 94???? Any ideas what this might be? Or what I need to check

eeeep10 is offline   Reply With Quote Quick reply to this message
Unread 10-23-2011, 08:44 AM   #2
rustyyj
Registered User
1987 YJ Wrangler 
 
Join Date: Oct 2011
Location: ballston lake, ny
Posts: 25
what temp do you normaly run at? what do you mean by high pressure? the pressure is controlled by the radiator cap. with a stock cap the system will be at about 13-15 psi (it should be stamped into the top of the rad cap)
rustyyj is offline   Reply With Quote Quick reply to this message
Unread 10-23-2011, 09:01 AM   #3
eeeep10
Registered User
1994 YJ Wrangler 
 
Join Date: Aug 2011
Location: oxford, nc
Posts: 12
It's running around 190 to 200 usually. It started leaking out the bottom of the radiator and started to weap out of the cap and top hose
eeeep10 is offline   Reply With Quote Quick reply to this message
Unread 10-23-2011, 09:05 AM   #4
rustyyj
Registered User
1987 YJ Wrangler 
 
Join Date: Oct 2011
Location: ballston lake, ny
Posts: 25
if all that happened while running at 190-210 id spend the $4 and grab a new rad cap of correct pressure (have your parts guy look it up) its the ceap easy place to start...
rustyyj is offline   Reply With Quote Quick reply to this message
Unread 10-23-2011, 09:10 AM   #5
johnny27030
Registered User
1991 YJ Wrangler 
 
Join Date: Aug 2011
Location: Mt Airy, NC
Posts: 138
When you replace the cap make sure to clean out any debri where the cap seals off. If there is grit in there it could cause the cap not to releive pressure like it should. If this doesnt fix it then try flushing the system.....even though if you temp gauge is correct it should not need. Hopfully you dont have a blown head gasket. Has it overheated recently?
johnny27030 is offline   Reply With Quote Quick reply to this message
Unread 10-23-2011, 10:22 AM   #6
dodger889
Registered User
1989 YJ Wrangler 
 
Join Date: Jan 2009
Location: mi
Posts: 4,161
Remove radiator cap when cool start your engine let it warmup and look for air bubbles in the radiator. If found, you have a head gasket leaking.
__________________
A 89 yj with a 4.0 aw4 sye out of an 92xj. Now the hard part is done time to get it up in the air just a bit. Working on 8.8 with 3.73 and lsd for the rear. and new D30 hp with 3.73 .
For those who have not figured this out I'm old school but can handle the new too.
Quote:
Originally Posted by bigsquat View Post
im just cheap, and cheap makes you creative.
dodger889 is offline   Reply With Quote Quick reply to this message
Unread 10-24-2011, 08:38 AM   #7
eeeep10
Registered User
1994 YJ Wrangler 
 
Join Date: Aug 2011
Location: oxford, nc
Posts: 12
Ended up finding a small pin hole in the radiator, patched it up for now as a quick fix til i can replace it next weekend. After replacing it and driving it last night there was a pretty high pitch whistling sound. I'm not sure if it was the belt whistling bc it had gotten wet but I'll check it today
eeeep10 is offline   Reply With Quote Quick reply to this message
Unread 10-24-2011, 07:02 PM   #8
nembudonna
Registered User
1990 YJ Wrangler 
 
Join Date: Feb 2011
Location: northwest, ark.
Posts: 903
Quote:
Originally Posted by eeeep10 View Post
Ended up finding a small pin hole in the radiator, patched it up for now as a quick fix til i can replace it next weekend. After replacing it and driving it last night there was a pretty high pitch whistling sound. I'm not sure if it was the belt whistling bc it had gotten wet but I'll check it today
Why would a pin hole in the radiator cause high pressure in the radiator? The pin hole may have been caused by high pressure.
nembudonna is offline   Reply With Quote Quick reply to this message
Unread 10-24-2011, 11:51 PM   #9
nembudonna
Registered User
1990 YJ Wrangler 
 
Join Date: Feb 2011
Location: northwest, ark.
Posts: 903
If your going to replace your radiator, I'll pay the shipping if you'll send me the one with the pin hole.
nembudonna is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
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


Suggested Threads





Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.