Cold running dodge!!!!

Homerjayswim · Nov 12, 2012

Hello all, I have a 2001 dodge ram 1500 5.2 and I'm having trouble getting it to run at its normal temp (195*). I have flushed the system and replaced the thermostat 3 times. The coolant level is right where it should be and the upper radiator hose is hot as it should be. My next step is to replace the coolant temp sensor, but my manual is telling me its right next to the thermostat housing by the A/C compressor.......it's not. Does anyone know where it is along with the coolant temp sender? Any help would be great!! Thanks all.

TexasCornBread · Nov 13, 2012

What thermostat are you running ?

If you can't dodge it RAM it !

Homerjayswim · Nov 13, 2012

Thanks for your reply. I am running an O'Reillys brand 195 degree thermostat. Any ideas??

Hollabakzach23 · Nov 13, 2012

Try dropping down to a 180 t stat. I did that seeing as I had a stock 195 in mine and it seems to run much smoother. If you find where the coolant temp sensor is please let me know I would like to change mine as well. I have yet to search for it though since I'm not in a huge hurry.

TexasCornBread · Nov 13, 2012

Are your sure the thermostats are not sticking ( open ) I had one in my truck that would stick open . Ill never use another fail safe again in my life . . Try the 180 stat and see what the does

If you can't dodge it RAM it !

Homerjayswim · Nov 14, 2012

Unfortunately I have replaced the thermostat 3 times and 1 of them was a 180* thermo. And when I hold the upper radiator hose I can feel when the thermostat opens, but I can't tell if it ever closes. It's not impossible, but its hard to believe that I have bought 3 bad thermos.

dogcar3 · Nov 14, 2012

What is your cooling fan doing during all of this? Could be a fan clutch that is stuck engaged. How warm does it get right now (what does the gauge say)?

Homerjayswim · Nov 14, 2012

Fan clutch isn't stuck, cause the fan speed will change accordingly. The gauge is stuck at 165 to 170. I am stuck.

dogcar3 · Nov 14, 2012

Only thing I can think of is try to find a second source for reading the temperature.

Homerjayswim · Nov 14, 2012

I recently found put they changed the location of the coolant sensor post 1998. I don't know where yet, but I'll find it damnit!!

Homerjayswim · Nov 16, 2012

Found it. It's underneath the alternator. Post 1998 5.2 liter engines only have 1 coolant sensor. Pre 1998 trucks have 2 sensors.

dan_sk · Mar 25, 2014

dogcar3 said:
What is your cooling fan doing during all of this? Could be a fan clutch that is stuck engaged. How warm does it get right now (what does the gauge say)?

My friends truck is having an issue reaching the proper temperature as well (it's about a third of the way) we tried pinching off the upper rad hose but it didn't seem to make the temperature rise. The fan is constantly running though, even from a cold start, could this be a stuck fan clutch? Or another issue?

Richard stuckey · Jan 21, 2018

Homerjayswim said:
I recently found put they changed the location of the coolant sensor post 1998. I don't know where yet, but I'll find it damnit!!

... Hey bud I know where it is located took me a minute to find it also it's behind the alternator between the intake and valve cover behind alternator

Richard stuckey · Jan 21, 2018

dapepper9 · Jan 21, 2018

Richard stuckey said:
... Hey bud I know where it is located took me a minute to find it also it's behind the alternator between the intake and valve cover behind alternator

This thread is from 2014

Cold running dodge!!!!

Homerjayswim

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