Forums
New posts
Search forums
Image search
Shop
Amazon Store
T-Shirts
Stickers
Members
Current visitors
Supporting Member Upgrade
Sponsors
About
Log in
Register
Search
Search titles only
By:
Search titles only
By:
New posts
Search forums
Image search
Search
Search titles only
By:
Search titles only
By:
Menu
Install the app
Install
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Forums
Jeep Wrangler YJ
YJ General Discussion
Help with overheating 4.0
Reply to thread
Message
<blockquote data-quote="Flyer58" data-source="post: 426360" data-attributes="member: 18629"><p>This sounds exactly like what happens (from what I've read) to the 4.0 when there is a big air bubble somewhere in the cooling system along the head. Look into properly "Burping" the air out of the system possibly by raising the front end.</p><p></p><p>About 20 years ago the place I worked had an old XJ Cherokee 4.0 that overheated on the highway and seized the engine. The dealership explained they had a problem with the air getting trapped. They mentioned some method or mod they did to prevent it.</p><p></p><p>I filled the radiator up on my YJ 2.5L then drove up on ramps and ran the engine with the radiator cap off until it warm up and thermostat opened up. Lots of air came out an I ended up adding another quart of coolant.</p></blockquote><p></p>
[QUOTE="Flyer58, post: 426360, member: 18629"] This sounds exactly like what happens (from what I've read) to the 4.0 when there is a big air bubble somewhere in the cooling system along the head. Look into properly "Burping" the air out of the system possibly by raising the front end. About 20 years ago the place I worked had an old XJ Cherokee 4.0 that overheated on the highway and seized the engine. The dealership explained they had a problem with the air getting trapped. They mentioned some method or mod they did to prevent it. I filled the radiator up on my YJ 2.5L then drove up on ramps and ran the engine with the radiator cap off until it warm up and thermostat opened up. Lots of air came out an I ended up adding another quart of coolant. [/QUOTE]
Verification
Post reply
Forums
Jeep Wrangler YJ
YJ General Discussion
Help with overheating 4.0
Top
Bottom