Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Hello, if you unplug the coolant sensor does the gauge fall to cold or go to hot?
when I unplug the coolant sending unit the gauge falls to cold
Thanks, ***** ***** no short in the wiring. Now if you would blace a piece of wire or paper clip in the connector part and ground it. The gauge should swing full hot, let me know what you find.
I already did that and the gauge pegged all the way hot.
Alright that means cluster and wiring are good. I see you also replaced the sensor.
Another thing that can make it run cool is the fan clutch staying engaged. Do you hear the roar of the fan all the time when driving?
I can't answer that for sure, should I go start it up and see ?
Yes, when you first start it the clutch should stay engaged for around 3-5 minutes and then the roaring should stop. If it doesn't the clutch is bad.
Ok I will start it up and see what happens. hold tight and I will let you know.
It appears that the clutch fan shut down after about 4 minutes. The coolant hoses are very hot to the touch and I have good heat in the cabin via the heater.
Alright, one last test to make sure they gave you the proper sending unit. This works best if you have a small saucepan and a candy thermometor for it. You'll need an ohm meter
Temperature Gauge: Testing and InspectionGauge Reads Low1. Ensure terminals are clean and connections are tight.2. Remove lead at sensor, measure resistance using an ohmmeter.3. At 104 degrees F resistance should be approximately 1200-1350 ohms, and at 125 degrees F resistance should be approximately 53-55 ohms.4. If resistance is not within specifications, replace sensor.
The GM part number for the right sending unit is 25037332
I already done this check after installing the sensor and temp was the same . We tested at aprox. 120 degrees and the ohms resistance was about 1200. It doesn't appear you can help me . I thought maybe you knew something that I was missing.
It should be around 50-55 at 120. I'll open this up to other experts to see if anyone else has any thoughts on this. Someone should be with you shortly.
The PN# ***** replaced with was ACDELCO 25037332 which is the correct one.
It is approaching an hour since our last chat. Is anybody helping me on my problem ?
Hi, My name is ***** ***** for the delay.
I will do my best to assist you.
lets try this again..
does the heater get hot as it should?
does the truck run well?
Hi Tim, I hope you can help me. The heater gets hot as it should and the truck runs very well with 104,194 miles on it.
ok..enlighten me here..
what is the problem?
is there some reason you need it to run hotter?
Tim , this was my wife's father's truck and he has passed on. My wife loves driving this truck and I want to make sure it is safe for her to drive. If for some reason the truck would start to overheat , while she was driving she would never know acording to the gauge. We put a thermo on the coolant and it was reading 200 degrees when fully running.
where did you get the 200deg reading?
what part of the engine?
sorry for the delay,i had internet trouble