removing air from cooling system - Jeep Commander Forums: Jeep Commander Forum
General Commander Discussion General Discussion involving the Jeep Commander goes here. If it does not fit into a more specific category below, post it here.

 
LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old 12-14-2017, 06:02 AM Thread Starter
Junior Member
Points: 1,660, Level: 23 Points: 1,660, Level: 23 Points: 1,660, Level: 23
Level up: 60% Level up: 60% Level up: 60%
Activity: 8% Activity: 8% Activity: 8%
 
Join Date: Oct 2017
Location: n.e. ohio
Own a Commander?: Yes
Model year: 2008
Trim Package: Sport
Power-Train: 3.7L V-6
4WD
If 4WD - system: QT-I
Current Mileage: 200,400
Posts: 22
removing air from cooling system

2008 3.7 cooling system air in system. I am getting heat but the coolant seems to backfire through the hoses and radiator. The last time the bottom hose popped off from the pressure. I changed the radiator and hoses, fan,and coolant temp sensor. 'the system still pops. Do I need to have the system vacuumed out to get all the air out, or is releasing pressure from the vent plug enough. Or do I have other problems. 'thanks
medwards is offline  
Sponsored Links
Advertisement
 
post #2 of 4 (permalink) Old 12-14-2017, 01:59 PM
Senior Member
Points: 2,907, Level: 33 Points: 2,907, Level: 33 Points: 2,907, Level: 33
Level up: 5% Level up: 5% Level up: 5%
Activity: 0% Activity: 0% Activity: 0%
 
Flex's Avatar
 
Join Date: Aug 2017
Location: Edmonton, Alberta Canada
Own a Commander?: Yes
Model year: 2006
Trim Package: Limited
Power-Train: 5.7L V-8 Hemi
4WD
If 4WD - system: QD-II
Current Mileage: 142,000 km
Posts: 371
Are you sure that you don't have a blown head gasket? That seems like an awful lot of pressure.

The easiet way to remove air from the system is jack the front of the vehicle up as high as you can and run the engine. I have owned 3 Dodge Ram V10 powered trucks and have had to do this each time the system is opened. They never blew hoses off, the air just got stuck in the heater core and didn't let the system make heat.

In most modern trucks and SUV's, the heater core is the highest spot in the cooling system so if air gets trapped in there, you have to jack up the front so that it can travel up to the rad.
Flex is offline  
post #3 of 4 (permalink) Old 12-17-2017, 03:24 PM Thread Starter
Junior Member
Points: 1,660, Level: 23 Points: 1,660, Level: 23 Points: 1,660, Level: 23
Level up: 60% Level up: 60% Level up: 60%
Activity: 8% Activity: 8% Activity: 8%
 
Join Date: Oct 2017
Location: n.e. ohio
Own a Commander?: Yes
Model year: 2008
Trim Package: Sport
Power-Train: 3.7L V-6
4WD
If 4WD - system: QT-I
Current Mileage: 200,400
Posts: 22
Maybe head gasket, but it has been fine now for 3 days. I bled it again through the vent plug. It does drip out the tail pipe, but no coolant in the oil on dip stick. It seems to run fine. Would'nt the head gasket create a miss.
medwards is offline  
 
post #4 of 4 (permalink) Old 12-18-2017, 07:10 AM
Senior Member
Points: 3,561, Level: 37 Points: 3,561, Level: 37 Points: 3,561, Level: 37
Level up: 41% Level up: 41% Level up: 41%
Activity: 4% Activity: 4% Activity: 4%
 
Join Date: Dec 2015
Location: Michigan
Own a Commander?: Yes
Model year: 2008
Trim Package: Limited
Power-Train: 5.7L V-8 Hemi
4WD
If 4WD - system: QD-II
Current Mileage: 135000
Posts: 136
Coolant should not drip out of the tailpipe. Condensation yes but no coolant. Put a piece of tape on your overflow bottle at the cold (after sitting overnight) and at the hot levels after driving and monitor levels from there. Make two reference points.
quickster2 is offline  
Sponsored Links
Advertisement
 
Reply

  Jeep Commander Forums: Jeep Commander Forum > Jeep Commander Discussion > General Commander Discussion

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Jeep Commander Forums: Jeep Commander 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:
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:
OR

Log-in











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
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not 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 On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome