jeffdmcdon
Probationary Member
- Messages
- 2
- Location
- TX & NM
I’ve been working my way through the high operating temperature issue on the ‘07 Base I recently purchased. I’ve confirmed the head gasket is not the source, replaced the fan clutch twice, thermostat, upgraded radiator, cleaned and properly attached the ac condensor, and complete coolant vacuum flush and fill. The gauge was finally reading slightly above 1/2 but occasionally would rise while idling. I did notice that the gauge would read 3/4 after turning off the engine and restarting after a short stop but would quickly drop to normal operating temperature upon starting and driving. Articles suggested replacing the coolant sensor. It made sense since I’d changed everything else and wasn’t sure how long the temps had been running higher before I purchased the H3. I thought that could’ve damaged the sensor.
When I replaced the sensor, I was initially unable to fit the socket onto the old sensor and discovered the header heat shield was pressing against it. After pushing the edge of the heat shield away as far as I could, I was able to seat the socket, remove the old and install the new sensors. I did several test drives and the gauge read normal, even after shutting off the engine and restarting. I will continue to monitor the gauge reading.
I’ve been thinking that the old sensor could’ve been reading the higher temps emitted by the header heat shield since they were in direct contact. Since the higher gauge reading seems to be a common issue with the H3s, checking this might help correct it, barring any other contributing factors.
When I replaced the sensor, I was initially unable to fit the socket onto the old sensor and discovered the header heat shield was pressing against it. After pushing the edge of the heat shield away as far as I could, I was able to seat the socket, remove the old and install the new sensors. I did several test drives and the gauge read normal, even after shutting off the engine and restarting. I will continue to monitor the gauge reading.
I’ve been thinking that the old sensor could’ve been reading the higher temps emitted by the header heat shield since they were in direct contact. Since the higher gauge reading seems to be a common issue with the H3s, checking this might help correct it, barring any other contributing factors.
