Well i changed out the fan clutch 350.00 and it didn't help at all. still running hot around 210-220 just driving down the road. It also lost some power and smoked for a few seconds at a light when i took off only got to 2500rpm's it did this the other day to any ideas I'm sick of this truck its getting time to trade it.

 

Have you flushed the rad? Cleaned the fins out? Any codes?

Which truck?

 

Losing coolant? Sounds like HG

 

new fluid and washed fins. how would you know if it's the HG what would it be doing?????????????

 

Check for coolant leaks around the head and coolant in the oil.

Also have you replaced the thermostat?

 

You can pressure test the coolant system to see if you have any leak down. Not necessary will you see leaks outside the engine and in the oil. I could be going out the exhaust!

 

Water pump, thermostat??

 

WHere are you located? 210F-220F in >100F weather is not uncommon. Mine will run 190-200, ONLY in the winter.

Tony

 

Corpus christi,tx but it never done this before always around 190 plus it goes up and down 15* my old 24v99 would stay around 180 and never got hot. this new truck with all this computer **** suck!!! i was told that there is some thing that tell the fan when to come on any ideas?????????

 

I know that this sounds like a odd question, but are you still smoking when it get that hot?

its possible you're not getting enough air into the engine (too much fuel). Possible a boot leak or plugged air filter or turbo (doubtful with low mileage 55k).

Do you have an EGT gauge? Has it been running hotter lately?

 

Have you verified the temp sender?

 

Assuming you are really running that hot and the coolant system checks out OK (including thermostat and water pump) go find a dealer to take a ride with you and their star scan or DRB tool. This tool can measure transmission slip. If nothing else is found, then I bet it is the trans or torque converter slipping.

 

If you just flushed your rad, you might have a trapped air pocket in the coolant path. I don't know much about this subject, but I hear about this problem a lot just after people flush the rad.

 

Mark,
I hear about that a lot with the VW diesels too. The fix is usually to run it, then let it cool completely to ambient, then check coolant level. That's usually all that's needed.

Tony

 

I think that the big thing with that is people drain the rad, and when they fill it, they don't get it to operating temp (let the t-stat open) before they finish topping it off.

I could be wrong on this, I'm not exactly sure when the overheating started.


Critter:

Was the truck running hot in the first place, so you flushed it, then it was still running hot, so you changed the fan? Or, did you flush it, and then it started running hot?

Could be a stuck t-stat, trash in the rad, possibly a HG, but unless you have coolant in the oil, oil in the coolant, or coolant on the side of the block, I would leave that as a last resort. (I believe it's still possible that it would be a HG problem even if none of those signs were present.)

Keep posting up, we'll figure it out.