DODGE RAM FORUM - Ram Forums and Owners Club! - Dodge Truck Forum

Go Back   DODGE RAM FORUM - Ram Forums and Owners Club! - Dodge Truck Forum > Dodge Ram Forum - Help Zone - Dodge Ram Problems, Complaints, & Solutions - Maintenance & Re > 3RD Generation Dodge Ram 2002 to 2008 Dodge Ram Trucks > Heating & Cooling


Notices

Heating & Cooling 3rd Gen Dodge Ram Heating & Cooling Problems and Questions.


Latest Vendor News
AutoAnything
Addictive Desert Designs!
Bayou Goat Mounts

Reply
 
Thread Tools
  #1  
Old 02-05-2012, 08:01 PM
BurningBlue's Avatar
BurningBlue BurningBlue is offline
Dodge Ram Forum Junior Member
 
Join Date: Feb 2012
Location: OK
Posts: 34
Gender: Male
Vehicle: 2003 4.7 QC Ram
Color: Graphite Metallic
Engine: 2002-2007 287ci (4.7L) PowerTech V8 235hp 295lb/ft
Rep Power: 0
Rep:10
BurningBlue is on a distinguished road
Default Heater core problems

Hi, I am having some issues with the 2003 4.7 Ram I just bought. The cabin heater literally does not work under any fan speed. It will blow warm for maybe 5-6 seconds the first time you turn the fan on...but will blow completely cold after that.

What also happens...is my engine will overheat if I try to drive on the highway for about 20 miles. Just driving around town, the coolant temps seem to be okay, but if I start driving 60 mph for an extended period of time, the engine will progressively overheat until it almost gets to into the red.

I checked the hoses going into my heater coil, and one of the hoses seems to stay cold.

Could this just be an AIR BUBBLE? I don't really know what steps to take to properly diagnose this issue...but I installed a new radiator cap and bought a new thermostat.

Could anyone help me find where the thermostat and heater control valve is on my truck?
__________________
2003 Ram 1500 4.7L Quadcab
1998 "Nassy Blue" Corvette LS2 6spd - 450 RWHP
Reply With Quote
Sponsored links
  #2  
Old 02-05-2012, 08:16 PM
GTyankee's Avatar
GTyankee GTyankee is online now
Dodge Ram Forum Member

 
Join Date: Dec 2009
Location: San Diego East County, Ca
Posts: 18,536
Gender: Male
Vehicle: 2009 Dodge Ram 1500 2X4
Trim Level: quad cab SLT
Color: sunburst orange pearl
Rep Power: 19
Rep:2608
GTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond reputeGTyankee has a reputation beyond repute
Default

it may be air or a plugged heater core

you should watch this video first


you can trouble shoot it by watching some YouTube videos

http://www.youtube.com/results?searc...55l541l2.3l5l0

the HeaterTreater videos are good too

http://www.youtube.com/results?searc...l1701l6.8l14l0

Good Luck
__________________
Ram 1500 SLT Quad cab, 5.7 HEMI(R) MDS VCT, 5 speed auto 545RFE, 3.55 differential gears, 18" Magnaflow muffler, EGR bug deflector, Bushwacker fender flares, customized Nfab nerf bars, CB radio, Autonet wi-fi router, custom soft tonneau cover, Line_X bedliner, DEBO Step, build date 10/15/08 a Wednesday built vehicle

Last edited by GTyankee; 02-05-2012 at 08:21 PM.
Reply With Quote
  #3  
Old 02-07-2012, 10:53 PM
devans devans is offline
Dodge Ram Forum Newcomer
 
Join Date: Dec 2011
Location: Rhode Island
Age: 51
Posts: 26
Gender: Male
Vehicle: 2002 Dodge Ram 1500
Trim Level: slt
Color: Black
Engine: 2002-2007 287ci (4.7L) PowerTech V8 235hp 295lb/ft
Rep Power: 0
Rep:10
devans is on a distinguished road
Default

If your return hose is cold then your heater core is blocked up. You could try back flushing the heater core to see if that takes care of your problem. There are chemicals you can try to help break up the really bad clogs, that may or may not work. Worst case scenario, new heater core. I'm having the same issue myself but I have to wait for a break in my work schedule to take care of mine. Good luck with yours.
Don
Reply With Quote
  #4  
Old 02-13-2012, 11:53 AM
bigdaddyII's Avatar
bigdaddyII bigdaddyII is offline
Dodge Ram Forum Senior Member!
 
Join Date: Sep 2009
Location: Southern, Louisiana
Age: 32
Posts: 565
Gender: Male
Vehicle: 2012 Ford F-150
Trim Level: XLT
Color: Metallic Blue
Rep Power: 6
Rep:91
bigdaddyII will become famous soon enough
Default

An air bubble can cause this. Try this:
2 heater hoses run along side the passenger side valve cover. There is a "T" here. Unclamp the hoses and blow air through on of the to clear the funky coolant and scale out. Pour some mean green or similar in and let it sit for an hour or so. Then flush with clean water both ways until the water runs out clear. Reconnect hoses.

Once you change the thermostat and flush the heater core, refill the reservoir and park the truck with the nose as far up as possible. Leave the radiator cap off and run the truck until the thermostat opens. Repeat at least once more and see where that leaves you.

The other scenario that would cause this is a blown head gasket, but try the simple stuff first before jumping to conclusions.

Oh, and the only heater control valve to my knowledge is the knob on the dash that you turn to the red. This moves a door in the hvac box to seal off the a/c condenser and open the heater core compartment. There is no valve that shuts off coolant to the core though. Coolant is always running through the core.
__________________
Sure it'll suck, but it'll make you a man
Reply With Quote
  #5  
Old 03-18-2012, 08:26 PM
BurningBlue's Avatar
BurningBlue BurningBlue is offline
Dodge Ram Forum Junior Member
 
Join Date: Feb 2012
Location: OK
Posts: 34
Gender: Male
Vehicle: 2003 4.7 QC Ram
Color: Graphite Metallic
Engine: 2002-2007 287ci (4.7L) PowerTech V8 235hp 295lb/ft
Rep Power: 0
Rep:10
BurningBlue is on a distinguished road
Default

I just want to say thanks to everyone that helped me out in this thread. I did everything you guys suggested.

The good news...My heater core works now. I flushed a ton of nasty orange crud out of my heater core. It flowed clean water both ways through the core when I reconnected the hoses.

I also replaced my thermostat, and "burped" the system as best as I could.

The Bad news, I took it out for a long drive after I got done, (started out my drive @ 200F*) it only took about 3 miles for the coolant temp to start to rise into the 220+ range. By the time I got it home 10 minutes later, the needle was almost pegged out.

I just don't get it...There is no sign of air in the system, I have no coolant leaks, thermostat is brand new, heater core flows... Why am I overheating so badly????


P.S. When I was inspecting my coolant in my drain pan, I found small specks of metal sitting at the bottom of the pan...what does that indicate...water pump...?
__________________
2003 Ram 1500 4.7L Quadcab
1998 "Nassy Blue" Corvette LS2 6spd - 450 RWHP
Reply With Quote
  #6  
Old 04-01-2012, 05:04 PM
BurningBlue's Avatar
BurningBlue BurningBlue is offline
Dodge Ram Forum Junior Member
 
Join Date: Feb 2012
Location: OK
Posts: 34
Gender: Male
Vehicle: 2003 4.7 QC Ram
Color: Graphite Metallic
Engine: 2002-2007 287ci (4.7L) PowerTech V8 235hp 295lb/ft
Rep Power: 0
Rep:10
BurningBlue is on a distinguished road
Default

Well...I replaced my radiator...problem solved.

The only indication I had that the radiator was bad...is the engine got hotter the faster I drove. Which is backwards to how it works with a good radiator.

There were no leaks.
__________________
2003 Ram 1500 4.7L Quadcab
1998 "Nassy Blue" Corvette LS2 6spd - 450 RWHP

Last edited by BurningBlue; 04-01-2012 at 05:09 PM.
Reply With Quote
  #7  
Old 05-02-2012, 06:09 AM
canadianwithadodge canadianwithadodge is offline
Dodge Ram Forum Newcomer
 
Join Date: Apr 2012
Location: Sandy, Utah
Age: 26
Posts: 2
Gender: Male
Vehicle: 2001 Dodge ram 1500 5.9
Trim Level: Sport 4x4 SB
Color: Miles deep Black
Engine: 1998-2001 360ci (5.9L) Magnum V8 245hp(standard), 250hp(Sport package)
Rep Power: 0
Rep:10
canadianwithadodge is on a distinguished road
Default

I had the same problem for aabout a week,i changed almost everything but the heater core an there were no blocks in the lines but then a week later my heater core blew an now im just bypassing it till i have time to fix it.
Reply With Quote
Reply

Bookmarks

Thread Tools

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

Forum Jump


Advertisement






All times are GMT -4. The time now is 02:14 AM.


= Copyright RamForumZ.com a Gigathreads.com Network Site =Ad Management by RedTyger
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
vB.Sponsors


=Gigathreads Network=
CLUBS MOPAR NATION DSM GPMM MAMM JAM
DIESEL Diesel Forum      
CHEVY Chevy Camaro Forum Chevy Volt Forum    
CHRYSLER Chrysler 300C Forum      
DODGE Dodge Avenger Forum Dodge Caliber Forum Dodge Challenger Forum Dodge Charger Forum
  Dodge Circuit Forum Dodge Hornet Forum Dodge Magnum Forum Dodge Nitro Forum
  Dodge Ram Forum Dodge Dakota Forum Dodge Durango Forum Dodge Dart Forum
FORD Ford Raptor Forum Ford F150 Forum Ford F100 Forum  
JEEP Jeep Forum      
PONTIAC Pontiac G8 Forum      
SRT SRT Viper Forum SRT Cuda Forum