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Old 10-11-2014, 04:54 PM   #1
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Temperature gauge

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Up until recently my temp gauge seemed to be working fine.
The car would usually run with the needle about half way up.
For a few days now, the needle won't go past the A, where it says NORMAL. And it actually usually stays around the L. Even though I can feel that the car is running the same as it did before.
I want to get this fixed ASAP. I don't want to have it overheat.
Any suggestions?


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Old 10-12-2014, 03:02 AM   #2
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Have you tried Cleaning or replacing your engine temperature sensor or coolant temperature sending unit sensor ?
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Old 10-12-2014, 03:05 AM   #3
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Have you tried Cleaning or replacing your engine temperature sensor or coolant temperature sending unit sensor ?

Not yet. I'll try that tomorrow morning.
Should I just clean them? Or look to replace them?
Do you know where they're at? Lol


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Old 10-12-2014, 03:21 AM   #4
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They're both on the front of the motor. the Coolant Sensor is on the Drivers side right behind the P.S. Pump area. It has 1 wire that slides on the top of the sensor. It costs about $13 New & the Engine Coolant sensor is on the opposite side in about the same area behind the Alternator. It has 1 Hose & a Plug in on it. I think that sensor is about $25....Can't remember for sure.
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Old 10-12-2014, 03:24 AM   #5
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They're both on the front of the motor. the Coolant Sensor is on the Drivers side right behind the P.S. Pump area. It has 1 wire that slides on the top of the sensor. It costs about $13 New & the Engine Coolant sensor is on the opposite side in about the same area behind the Alternator. It has 1 Hose & a Plug in on it. I think that sensor is about $25....Can't remember for sure.
Cool. Thanks a lot. I'll check those out in the morning.





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Old 10-12-2014, 03:30 AM   #6
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Just Clean the coolant Temp Sensor first to see if that helps. I think that sensor tells your gauge the temp. Takes you 5 minutes to remove. Clean the end with some Carb Cleaner & then Clean the Carb Cleaner off with rubbing alcohol before re-installing it.
My car use to go up 3/4 of the way on the gauge till I replaced that sensor. Car never over heated...Sensor just didn't read right. It's never went over the 1/2 way point since changing the sensor.
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Old 10-13-2014, 02:28 PM   #7
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Finally getting ready to clean the sensor in a little bit. I'll let you know if it worked out.

Do these sensors just go out? Or is it an indication that there might be something else wrong that's causing it to not work?


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Old 10-13-2014, 06:09 PM   #8
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They get gummed up & don't read right. It should be shiny brass looking. It's probably Dark Gray right now. Not sure if they go out or not. But since I was building a Motor I just bought one for it as I didn't have one to clean.
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Old 10-13-2014, 06:19 PM   #9
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By any chance do you have Under Drive Pulley's on your car. I did & they messed with my cooling system, Temp Gauge, Charging System...just everything. My gauges got kind of crazy with those pulley's. Put the Stock ones back on & everything went right back to normal.
I have cleaned the sensor that's in my car & solved the problem.
I just bought a New Sensor when I built the Motor I just sold. It's in my pics.
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Old 10-15-2014, 02:15 PM   #10
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By any chance do you have Under Drive Pulley's on your car. I did & they messed with my cooling system, Temp Gauge, Charging System...just everything. My gauges got kind of crazy with those pulley's. Put the Stock ones back on & everything went right back to normal.
I have cleaned the sensor that's in my car & solved the problem.
I just bought a New Sensor when I built the Motor I just sold. It's in my pics.

No, on the under drive pulleys.
I took it off to clean it, it was dark gray after I cleaned the rust off of it. Lol. I ordered a new one. Should be here tomorrow.
Is the rust on the sensor a sign of another bad thing?
I was told before that rust in the coolant is normal on older cars and to just flush it out.




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Old 10-15-2014, 03:05 PM   #11
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Just Flush it out is all. If that sensor is rusty it's probably been in there since the car was New. It's probably no good. Do you have a port on your Heater Hose ? One that you can connect a Garden Hose to ? Hook it up & Flush it out that way. Rust is Normal in an older car but still....the cleaner the better as you don't want rust stopping up your water jackets & causing overheating.
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Old 10-15-2014, 04:10 PM   #12
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Just Flush it out is all. If that sensor is rusty it's probably been in there since the car was New. It's probably no good. Do you have a port on your Heater Hose ? One that you can connect a Garden Hose to ? Hook it up & Flush it out that way. Rust is Normal in an older car but still....the cleaner the better as you don't want rust stopping up your water jackets & causing overheating.

I'll check it out and get that done.
Thanks a lot, dude.


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