Ford Ranger Forum - Forums for Ford Ranger enthusiasts!

Go Back   Ford Ranger Forum - Forums for Ford Ranger enthusiasts! > > >
Forgot Password? Join Us!

Welcome to Ford Ranger Forum

Reply
 
Thread Tools Search this Thread

  #1  
Old 05-24-2010, 05:46 AM
firefighter4co21 firefighter4co21 is offline
Liking the Ford Ranger Forum
 
Join Date: May 2010
Posts: 19
Default Coolant bubbling in overfill tank

Ok so I have noticed that my 99 Ranger tends to push water back into the overfill tank and seems to constantly push a little air back into the overfill tank but doesn't seem to suck it back into the radiator. Is there any thing that can cause this other than a blown head gasket or cracked head?
Reply With Quote
  #2  
Old 05-24-2010, 06:38 AM
FireRanger FireRanger is offline
Blinded by the light
 
Join Date: Sep 2009
Posts: 7,674
Send a message via AIM to FireRanger
Default Re: Coolant bubbling in overfill tank

This is the third time you've started a thread asking this question this month so I'll just copy and paste my response from the last time you asked.

Quote:
Originally Posted by FireRanger View Post
It is one of two things.

(1) Radiator cap is shot. They are designed to hold back about 15psi. If there is more than 15PSI in the cooling system, the engine is overheating and the cap will release and vent into the reservoir tank (think PRV on propane tank car, hopefully without the BLEVE which I did have happen once on my truck!)

(2) Head gasket is blown or the heads are warped. Pressure from the cylinders on the compression stroke is pushing into the cooling passages and over pressurizing the cooling system. Too much pressure opens the radiator cap vent and vents it into the reservoir tank.

#1 is cheap and easy at any auto part store. #2, you're screwed.
__________________
(Formerly)
FireRanger
2003 Edge 4.0 4wd

How to: Aux light wiring, relays, & fuses
Info: 300+ intake threads here on FRF
Info: HID Projectors
How To: NO HEAT Troubleshooting Guide
Reply With Quote
  #3  
Old 05-24-2010, 11:20 AM
firefighter4co21 firefighter4co21 is offline
Liking the Ford Ranger Forum
 
Join Date: May 2010
Posts: 19
Default Re: Coolant bubbling in overfill tank

Fireranger I am not stupid. I have changed the radiator cap, thermostat, water pump, and flushed the coolant system. I just wanted to see if possibly I may have missed something before I just start tearing into it.
Reply With Quote
  #4  
Old 05-24-2010, 11:43 AM
FireRanger FireRanger is offline
Blinded by the light
 
Join Date: Sep 2009
Posts: 7,674
Send a message via AIM to FireRanger
Default Re: Coolant bubbling in overfill tank

Quote:
Originally Posted by firefighter4co21 View Post
Ok so I have noticed that my 99 Ranger tends to push water back into the overfill tank and seems to constantly push a little air back into the overfill tank but doesn't seem to suck it back into the radiator. Is there any thing that can cause this other than a blown head gasket or cracked head?
Quote:
Originally Posted by firefighter4co21 View Post
Fireranger I am not stupid. I have changed the radiator cap, thermostat, water pump, and flushed the coolant system. I just wanted to see if possibly I may have missed something before I just start tearing into it.
Well you asked "what might be wrong" without saying what you have done. What do you want us to do? Read your mind before answering?

Before answering this thread earlier today, I went back and read all your other posts you made about this. You stated you flushed it, replaced your thermostat and tried trading radiator caps with another vehicle and that is all you did. You stated that when using the other vehicle's radiator cap, it worked fine but now your saying its not working. You fixed it, you didn't fix it, you did this then didn't do this. And you keep asking the same question with a different story over and over. Make up your mind.

I and others have answered your questions and given you direction several times. You keep choosing to ignore what we're telling you, then come back and ask again. I don't know what more you want from us?
__________________
(Formerly)
FireRanger
2003 Edge 4.0 4wd

How to: Aux light wiring, relays, & fuses
Info: 300+ intake threads here on FRF
Info: HID Projectors
How To: NO HEAT Troubleshooting Guide
Reply With Quote
  #5  
Old 04-02-2013, 04:04 PM
Roger-ranger Roger-ranger is offline
Learning to use the forums
 
Join Date: Apr 2013
Posts: 7
Default Re: Coolant bubbling in overfill tank

The bubbling can come from a couple of things; it ain't normal.

Some are if you have a bad thermostat, fan clutch, water pump or ECT sensor.

But one overlooked thing can also be why. Water boils at 212 degrees F. If under pressure, it will raise the boiling point.
These systems are under pressure during normal use. If you have a leak in the overflow tank, or elsewhere, it can lower the pressure in the system and cause the water/coolant to boil a bit. Get the pressure back up (new overflow tank) and it will stop.
Reply With Quote
  #6  
Old 04-02-2013, 05:24 PM
cowboybilly9mile cowboybilly9mile is offline
Ford Ranger Driver
 
Join Date: Mar 2010
Posts: 4,900
Default Re: Coolant bubbling in overfill tank

Quote:
Originally Posted by Roger-ranger View Post
The bubbling can come from a couple of things; it ain't normal.

Some are if you have a bad thermostat, fan clutch, water pump or ECT sensor.

But one overlooked thing can also be why. Water boils at 212 degrees F. If under pressure, it will raise the boiling point.
These systems are under pressure during normal use. If you have a leak in the overflow tank, or elsewhere, it can lower the pressure in the system and cause the water/coolant to boil a bit. Get the pressure back up (new overflow tank) and it will stop.
Huh and WTF? The burp tank is open to atmosphere and carries absolutely no pressure relative to ambient whatsoever.

Quote:
Originally Posted by Roger-ranger View Post
The bubbling can come from a couple of things; it ain't normal.

Some are if you have a bad thermostat, fan clutch, water pump or ECT sensor.

But one overlooked thing can also be why. Water boils at 212 degrees F. If under pressure, it will raise the boiling point.
These systems are under pressure during normal use. If you have a leak in the overflow tank, or elsewhere, it can lower the pressure in the system and cause the water/coolant to boil a bit. Get the pressure back up (new overflow tank) and it will stop.
Umm......the burp tank carries no pressure whatsoever, he can buy a new one and it to will carry no pressure, thats how they work. Really, how many psi does anyone think that soft plastic botle would actually carry...........
Reply With Quote
  #7  
Old 04-16-2013, 06:15 AM
Snake-Eyes Snake-Eyes is offline
Liking the Ford Ranger Forum
 
Join Date: Oct 2012
Posts: 22
Default Re: Coolant bubbling in overfill tank

You are getting air in your system forcing the coolant into the over flow. In my case it was warped heads. With that being said my mechanc told me the problem with these engines is the water pump. He recommended replacing after 80k (my truck had 123k). My truck had never gotten hot, never been abused but still the heads were warped. The reason I was told was the water pump rusted & offered poor circulation over time. To everyone that owns the 3.0 flex; CHANGE YOUR WATER PUMP if you have not already done so.
Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Overflow tank is bubbling yet engine is not overheating? Please Help. jennifer1207 General Tech 26 04-02-2013 04:05 PM
How big is my gas tank? smurphy General Tech 13 01-18-2010 06:15 PM
gas tank problems...I think corto General Tech 0 10-26-2009 10:10 AM
my 88 dies when i only have half a tank mrdadeink 2.9 Liter Tech 31 09-24-2009 11:20 AM
what is the tank called on a ford ranger where you fill the coolant? Trace O General Ford Ranger Discussion 1 01-25-2009 07:57 PM