My dash temperature gauge shows that I am heatng to 230 degrees F while towing. It never did that before. I changed out the clutch fan and installed a new one, but I am still showing the same temperature rise while towing. When I check the reservoir temperature while idling, the dash gauge says 205 while my calibrated gauge shows 155 in the reservoir? The truck doesn't appear to be boiling hot. Any thoughts would eb appreciated.
- Thread starter dej(Jed)
- Start date
Super-H-Mike
Member
Check for general trash clogging the front of the radiator fins between the AC condensor and radiator.
Liquid_wrench
Member
- Location
- Ohio
Could be the stepper motor on the gauge...GM used junk motors on them from 2000-2007 (i think) my 05 silverado oil pressure was over 80 psi...took dash apart and replaced all 6 motors (you have to de- solder and re-solder the new ones in...took me about 2 hours.You can find how to do it online.I got mine from wholsalesteppermotors.com for $30.00 free shipping...they give detailed instructions with order and also comes with (10) dash lights if you have any that are out.replace all 6 motors.. or the other ones will soon follow.
buickanddeere
Well-known Member
If the rad fins are clean and not bent over from somebody using a HP washer. She's fine with a pressurized radiator and 50/50 premium coolant mix and distilled water.
230F is warm but not particularly hot, why the concern?
glennster
Well-known Member
let the engine cool down and pull the radiator cap and check the antifreeze. if it has dex cool in it, check for any jelling or "gook" you may need a good flush and fill of the cooling system. you can switch from the dex cool to a universal type antifreeze. there is also a coolant additive like purple ice that breaks the surface tension of the coolant to help the antifreeze transfer heat better.
danofarming
Member
I Ditto getting rid of the Dexcool Flush and refill with a good quality regular a freeze mix. If you want install a high flow Thermostat, I had a 90 model 4.3 v6 and a 5.7 that would not flow enough coolant to the radiator to stay cool.
Steve@Advance
Well-known Member
My '01 did that. Discovered the radiator was packed with sand and grass. It was between the rad and condenser, not visible without puling the rad. Did just what dej(jed)'s is doing, heating up pulling a heavy trailer.
buickanddeere
Well-known Member
That maybe the line from the head up to the throttle body and into the rad ?
Besides keeping the throttle body from icing. iirc it was also to carry any steam or air bubbles out of the head ?
Fullers Farmalls
Member
I'll add to the dexcool probably causing problems. When they say flush though you better make sure every ounce of that stuff is out of there. I mean every spec. I flushed mine 4 or 5 times with water, then the radiator flushes from Napa, then vinegar, and it still wasn't all out. Finally took it to a shop and had them clean it up real good and fix the stuck valve. Didn't have a problem after that. Sold the truck and it is still running as I see it from time to time.
buickanddeere
Well-known Member
Dexcool = Wrecks Cool
Flushed it last night. Added some blue dyed military ethylene glycol. What is weird is that the old stuff looked good. I was expecting to see some gunk, but nothing. Now the latest thing it does is drop way off to 160 or so on the gauge. It stays low for a bit and then back uo to 205/210 or so. I am seriously wondering if it isn't just a wacky gauge.
Aaron Ford
Well-known Member
I unbolted the radiator and condensor from my powerstroke and seperated them just enough to see that they were full of clay and sand. They looked clean from the outside.
Could the vanes be missing on the water pump causing a low flow condition?
I am otherwise out of ideas...
Aaron
Could the vanes be missing on the water pump causing a low flow condition?
I am otherwise out of ideas...
Aaron
MARK ROBKE
Well-known Member
I would bet money from here on the gauge; these are known to have dash issues, or posibly the sender unit. Mark
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