How do you burp the cooling system? - Dodge Durango Forum
4.7L/4.7L HO/4.7L Gen II Engines Questions regarding the 4.7L V8 engine

Reply
 
Thread Tools Rate Thread Display Modes
post #1 of 19 Old 06-23-2010, 01:47 AM Thread Starter
DakotaMike
Registered User
 
Join Date: Nov 2007
Location: Clarksville, Indiana
Vehicle: 1991 Dakota / 2001 QC 4x4
Posts: 396
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
How do you burp the cooling system?

Hi guys,
I recently installed HO cams, new lifters, new water pump and thermostate on my 2001 QC 4.7L Dakota. I had no problems for the first week at all with the cooling system but now that the outside temp is mid 90's it's running a little hot (slightly over 12 O'clock on the gage). I think I might have some air trapped. Can someone enlighten me on the procedure to burp this system?
Thanks,
Mike

91 CC Carbed 414 R3
01 Quad Cab 4x4 4.7L
DakotaMike is offline  
Sponsored Links
Advertisement
 
post #2 of 19 Old 06-23-2010, 02:15 AM
caulk04
.:.:.:.:.:.:.:.


 
Join Date: Jan 2006
Location: nowhereville
Vehicle: none
Posts: 10,421
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
     
Pull cap, let truck run until warm. Fill it at the cap, then top off the resevoir as well.

Go beat the hell out of it for a bit (seemed to help me if not the truck). Check it after it's been cool for a while, it should pull what it needs from the resevoir.
caulk04 is offline  
post #3 of 19 Old 06-23-2010, 02:38 AM Thread Starter
DakotaMike
Registered User
 
Join Date: Nov 2007
Location: Clarksville, Indiana
Vehicle: 1991 Dakota / 2001 QC 4x4
Posts: 396
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
Thanks for the quick reply. When I refilled the coolant I simply topped it off drive around the block and let it cool and topped it off again and the overflow. I haven't checked it since. I though there was a special procedure in which you had to remove the bleeder plug and rev the engine or something? I will take the cap off tomorrow and let it run until the thermostate opens and make sure it's full.
Thanks again for the reply,
Mike

91 CC Carbed 414 R3
01 Quad Cab 4x4 4.7L
DakotaMike is offline  
post #4 of 19 Old 06-23-2010, 03:04 AM
djdanrt
Registered User
 
djdanrt's Avatar
 
Join Date: Jan 2010
Location: Plano, TX
Vehicle: 2x 2000 Dakota RC 4.7
Modifications: K&N FIPK, ASP Pulley, BBK 70mm TB
Posts: 754
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
Quote:
Originally Posted by DakotaMike View Post
Hi guys,
I recently installed HO cams, new lifters, new water pump and thermostate on my 2001 QC 4.7L Dakota. I had no problems for the first week at all with the cooling system but now that the outside temp is mid 90's it's running a little hot (slightly over 12 O'clock on the gage). I think I might have some air trapped. Can someone enlighten me on the procedure to burp this system?
Thanks,
Mike
I think the proper way involves the bleeder screw.
djdanrt is offline  
post #5 of 19 Old 06-23-2010, 03:23 AM
GWhaley
Registered User
 
Join Date: Jan 2006
Location: Ontario Canada
Vehicle: 2001 Dakota Q.C.
Posts: 2,371
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
According to FSM - this is how I did it and haven't had an issue.

STANDARD PROCEDURE - REFILLING
COOLING SYSTEM 4.7L ENGINE
(1) Tighten the radiator draincock and the cylinder
block drain plug(s) (if removed).
CAUTION: Failure to purge air from the cooling system
can result in an overheating condition and
severe engine damage.
(2) Remove the cooling system bleed plug from the
radiator upper hose inlet housing. (Fig. 11)Fill system
using a 50/50 mixture of ethylene-glycol antifreeze
and low mineral content water, until coolant begains
coming out of the cooling system bleed hole. Install
the cooling system bleed plug. Fill radiator to top and
install radiator cap. Add sufficient coolant to the
reserve/overflow tank to raise level to FULL mark.
(3) With heater control unit in the HEAT position,
operate engine with radiator cap in place.
(4) After engine has reached normal operating
temperature, shut engine off and allow it to cool.

When engine is cooling down, coolant will be drawn
into the radiator from the reserve/overflow tank.
(5) Add coolant to reserve/overflow tank as necessary.
Only add coolant to the reserve/overflow
tank when the engine is cold. Coolant level in a
warm engine will be higher due to thermal
expansion.
GWhaley is offline  
post #6 of 19 Old 06-23-2010, 10:51 PM
caulk04
.:.:.:.:.:.:.:.


 
Join Date: Jan 2006
Location: nowhereville
Vehicle: none
Posts: 10,421
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
     
Quote:
Originally Posted by djdanrt View Post
I think the proper way involves the bleeder screw.
It can't hurt, but my method worked for me and I felt a whole lot better after my little joy ride.
caulk04 is offline  
post #7 of 19 Old 06-23-2010, 10:58 PM
jmaack727
"][" {[]} {[]} ][_ 
 
jmaack727's Avatar
 
Join Date: Jan 2006
Location: Alabamalama
Vehicle: 2 of em.
Posts: 17,338
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
       
Where is the bleed hole on a 3.9 5.2 5.9 engine?

I just removed my cap brought it up to temp, filled it up as it warmed then topped off reservoir. Then just put the cap back on.
jmaack727 is offline  
post #8 of 19 Old 06-24-2010, 12:38 AM
GWhaley
Registered User
 
Join Date: Jan 2006
Location: Ontario Canada
Vehicle: 2001 Dakota Q.C.
Posts: 2,371
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
Quote:
Originally Posted by jmaack727 View Post
Where is the bleed hole on a 3.9 5.2 5.9 engine?

I just removed my cap brought it up to temp, filled it up as it warmed then topped off reservoir. Then just put the cap back on.

I think it is only the 4.7 that has the bleeder screw
GWhaley is offline  
post #9 of 19 Old 06-24-2010, 12:39 AM
jmaack727
"][" {[]} {[]} ][_ 
 
jmaack727's Avatar
 
Join Date: Jan 2006
Location: Alabamalama
Vehicle: 2 of em.
Posts: 17,338
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
       
Quote:
Originally Posted by GWhaley View Post
I think it is only the 4.7 that has the bleeder screw
I dont have one on mine I know that.
jmaack727 is offline  
post #10 of 19 Old 06-24-2010, 01:02 AM
caulk04
.:.:.:.:.:.:.:.


 
Join Date: Jan 2006
Location: nowhereville
Vehicle: none
Posts: 10,421
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
     
Quote:
Originally Posted by jmaack727 View Post
I dont have one on mine I know that.
On your what? pushrod motor or 4.7 (you only have the R/T, right?)?

I'm pretty sure the pushrod motors never had a bleeder, just the 4.7 because of the location of the water outlet. It's high and pretty much horizontal from the timing cover (where the bleeder is) to the cap.
caulk04 is offline  
post #11 of 19 Old 06-24-2010, 01:05 AM
jmaack727
"][" {[]} {[]} ][_ 
 
jmaack727's Avatar
 
Join Date: Jan 2006
Location: Alabamalama
Vehicle: 2 of em.
Posts: 17,338
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
       
Quote:
Originally Posted by caulk04 View Post
On your what? pushrod motor or 4.7 (you only have the R/T, right?)?

I'm pretty sure the pushrod motors never had a bleeder, just the 4.7 because of the location of the water outlet. It's high and pretty much horizontal from the timing cover (where the bleeder is) to the cap.
Bah NM It was too early when I first replied this morning, Well when I woke up.... I was thinking it was for his 390..
jmaack727 is offline  
post #12 of 19 Old 06-29-2010, 02:48 AM
djr8505
Backwoods Country Bumpkin
 
djr8505's Avatar
 
Join Date: Aug 2008
Location: Rochester NY
Vehicle: 1998 Dodge Dakota SLT 4X4
Modifications: It has 4 tires which is a good start for a truck right?
Posts: 57
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
Send a message via AIM to djr8505
With my 5.2 I burped the coolant system by filling the radiator with 50/50 and then squeezing the upper and lower coolant hoses until there were no bubbles coming out of the top of the radiator. Then I topped of the radiator before sealing everything up. Works great, especially with the new 180 thermo.

Ellipsis - The short pause between rational thought and well ... Nothing!

S B C
djr8505 is offline  
post #13 of 19 Old 06-29-2010, 07:22 AM
krs
Registered User
 
krs's Avatar
 
Join Date: Oct 2007
Location: USA
Vehicle: Dodge Ram
Posts: 374
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
Quote:
Originally Posted by djr8505 View Post
With my 5.2 I burped the coolant system by filling the radiator with 50/50 and then squeezing the upper and lower coolant hoses until there were no bubbles coming out of the top of the radiator. Then I topped of the radiator before sealing everything up. Works great, especially with the new 180 thermo.
This is what I do with my 4.7 as well

2002 Ram 4.7L 2wd Sold

Performance: 4.56 Gears, H/O Cams, 2008 Intake Manifold, Ported 70mm TB, 4" Custom MIT Tube, Gibson SS Headers, Superchips 3865, Custom Y-Pipe With Magnaflow High Flow Cat and Muffler (12580) SI/DO Turn Down After Axel, Jeep Grand Cherokee TCM
krs is offline  
post #14 of 19 Old 06-30-2010, 01:45 AM Thread Starter
DakotaMike
Registered User
 
Join Date: Nov 2007
Location: Clarksville, Indiana
Vehicle: 1991 Dakota / 2001 QC 4x4
Posts: 396
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
Quote:
Originally Posted by GWhaley View Post
According to FSM - this is how I did it and haven't had an issue.

STANDARD PROCEDURE - REFILLING
COOLING SYSTEM 4.7L ENGINE
(1) Tighten the radiator draincock and the cylinder
block drain plug(s) (if removed).
CAUTION: Failure to purge air from the cooling system
can result in an overheating condition and
severe engine damage.
(2) Remove the cooling system bleed plug from the
radiator upper hose inlet housing. (Fig. 11)Fill system
using a 50/50 mixture of ethylene-glycol antifreeze
and low mineral content water, until coolant begains
coming out of the cooling system bleed hole. Install
the cooling system bleed plug. Fill radiator to top and
install radiator cap. Add sufficient coolant to the
reserve/overflow tank to raise level to FULL mark.
(3) With heater control unit in the HEAT position,
operate engine with radiator cap in place.
(4) After engine has reached normal operating
temperature, shut engine off and allow it to cool.

When engine is cooling down, coolant will be drawn
into the radiator from the reserve/overflow tank.
(5) Add coolant to reserve/overflow tank as necessary.
Only add coolant to the reserve/overflow
tank when the engine is cold. Coolant level in a
warm engine will be higher due to thermal
expansion.
Thanks for the info GWhaley! I drained the cooling system, flushed out the entire system with the good old garden hose, refilled with Peak lifetime coolant and distilled water following the instructions above. No problems at all.. Towed my 91 on my 18 foot trailer 30 miles to the chassis shop to have the some bars added to the cage (so it will certify) with the a/c on and the gauge never made it to half way, just like it used to be. I feel safe saying it was air in the system.

Thanks again for the info!
Mike

91 CC Carbed 414 R3
01 Quad Cab 4x4 4.7L
DakotaMike is offline  
post #15 of 19 Old 06-30-2010, 02:59 AM
gocartone
Registered User
 
gocartone's Avatar
 
Join Date: Dec 2009
Location: Wisconsin
Vehicle: 2001 Dakota 4x4 R/C
Posts: 2,755
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
Correct way to do it is to leave the heat on full blast, hold the RPM's at about 3k and keep adding coolant til it stops going down. You need to hold the throttle til it gets up to temp and the t-stat opens up. DON'T drive it as there is no reason, and you need to keep an eye on the coolant level which is kind of hard when you are going down the road haha. IDK if there is a bleeder screw on the 4.7 or not I didn't see anything when I did mine and it worked just fine.

2008 Corvette 485whp
2001 RC 4.7 5-Speed 4x4
2006 Yamaha FZ6
2004 Honda 450R
gocartone is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Dodge Durango 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.



User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes Rate This Thread
Linear Mode Linear Mode
Rate This Thread:


Forum Jump

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

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