5.9 gas cooling problem

Asked by May 09, 2016 at 05:39 PM about the 1998 Dodge Ram 1500 4 Dr Laramie SLT 4WD Extended Cab SB

Question type: Maintenance & Repair

Having a cooling problem  I just bought this truck
the radiator was sepperated from the plastic side
tanks to the cooling tubes I've replaced with a
used one the clutch fan is new and the water
pump was replaced and the thermostat 194° put it
a pan heated up on stove to make sure it worked    
I can let idle for 40 minutes as I'm filling water
making sure all the air is out with the a.c. on and
temp climbed to 210° after an hour of run time all
and all with everything buttoned up  I can live with
that but as soon as run the truck 70 mph it gets
hot 230-250 turn off the a.c and it comes back
down to 230 and seems to stay but if you push the
motor harder it gets hotter as I go slower setting in
traffic/stop lights it cools down to 210-220 I just
don't get it. It seems to be backwards it should be
over heating with the a.c. on idling other than
rolling down the road with more air and water
movement any help would be great info

2 Answers

Feeling kinda silly but I found the issue Radiator was plugged in the mid section NOTE TO SELF As you do any changes to the cooling system run you hand on the Radiator palm flat and if your coolant is flowing property you will feel even heat from top to bottom of radiator GRRR


Fist get to regular temp squeze hoses to check for flow BE CAREFULL HOT .may have to flush your heater core .had that with mine after putting new radiator in

Your Answer

Dodge Ram 1500 Experts

  • #1
    Dan Connell
  • #2
  • #3
View All

Related Models For Sale

Used Ford F-150
3,062 Great Deals out of 230,783 listings starting at $1,300
Used Chevrolet Silverado 1500
2,716 Great Deals out of 158,224 listings starting at $1,850
Used Dodge Ram 2500
162 Great Deals out of 5,430 listings starting at $2,999
Used GMC Sierra 1500
1,099 Great Deals out of 61,833 listings starting at $1,295
Used Toyota Tacoma
565 Great Deals out of 40,827 listings starting at $2,995
Used Ford F-250 Super Duty
433 Great Deals out of 47,782 listings starting at $1,700
Used Dodge Dakota
78 Great Deals out of 3,451 listings starting at $1,475
Used Ford Mustang
348 Great Deals out of 41,846 listings starting at $1,488
Used Dodge Ram 3500
69 Great Deals out of 2,267 listings starting at $5,950

Used Cars For Sale

2010 Dodge Ram 1500 For Sale
39 Great Deals out of 1,392 listings starting at $5,800
2009 Dodge Ram 1500 For Sale
37 Great Deals out of 1,070 listings starting at $3,999
2008 Dodge Ram 1500 For Sale
63 Great Deals out of 1,532 listings starting at $2,925
2007 Dodge Ram 1500 For Sale
55 Great Deals out of 1,428 listings starting at $3,800
2006 Dodge Ram 1500 For Sale
47 Great Deals out of 1,148 listings starting at $2,950

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.