2.3L ('02-'11) 254 degree CHT?


hannah2001

Forum Member

Joined
Jul 27, 2024
Messages
29
Points
101
City
Georgia
Vehicle Year
2002
Engine
2.3 (4 Cylinder)
Transmission
Automatic
Tire Size
265/75/15
I cant find reliable information about this online so im deciding to make my own post. I just swapped in a 150k mile engine 2.3 duratec 2002. my previous engine had 250k and lost compression on cylinder 3.

I cant get the temp gauge to go any higher than the photo. I plugged forscan up to it and a 5 minute drive around my town cylinder head temperature sensor read as high as 254 at one point and coolant temperature peaked around 230. are these normal temperatures? i swear the engine smells like its overheating, floorboards are really really hot. but again gauge wont go any higher than this and no CEL, no check gauge light for overheating. i also noticed it gets up to temperature extremely fast. im talking like idling in the driveway for 2 minutes and its already up to like 190 degrees cht. coolant is not boiling over. heater blows hot.

fresh ford orange coolant
new radiator
new thermostat 208 degrees
this engine came with all accessories so im using the water pump, fan clutch etc that was on it already

i may just be paranoid but 254 seems awful hot, even the coolant at 230 seems hot. i figured around 220 max. this was also just light driving around town no interstate etc. I am in middle georgia so it is hot as hell outside right now. still concerned. anything i need to check?

i should mention my old engine with 250k the heat gauge would go to the middle around the symbol and this one will not even though forscan reads the temperatures as very hot
IMG_6659.jpeg
 
Laser temp tool on hand?
 
I do have one. What should I look at?
Everything! Rad, cylinder head, engine block, etc.

Post some Temps. If you are indeed running at 254F, you have a problem and have cooked your oil.
 
Update? Maybe a stuck thermostat or bad clutch fan?
 
I'm curious how this turned out as well. One thing to bear in mind is that these modern dash gauges don't give accurate readings, they're more like sophisticated idiot lights that favor a certain part of the gauge for feel-good effect. However, it is interesting that it sits in a different place than with the old engine, especially when Forscan reads so high. I'm wondering if it's a sensor problem, either defective or different spec than the other engine.
 
Apparently she never made it home.

Must have been a rather serious problem.
 
i'm so sorry yall i genuinely got extremely busy and havent had time to mess with it. i will 100% post some temperatures tomorrow after i get home from work. did not forget about yall
 
the diagnostics manual states 194 to 230 degrees.
 

Sponsored Ad

TRS Events & Gatherings

Featured Rangers

Want to see your truck here? Share your photos and details in the forum.

TRS Latest Video

Official TRS Merchandise

Follow TRS On Instagram


Product Suggestions

Back
Top