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Old 07-13-2008, 11:03 PM   #1
badchad
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Default Coolant Temp gauge not reading

I have a '96 Legacy Outback 2.5l. The coolant temp gauge sits on the needle at cold and does not move at all. Any ideas on fixing this problem, or would I be better off going with an aftermarket gauge?
Thanks much,
Chad
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Old 07-14-2008, 12:15 AM   #2
illegal2.2
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i think you need to replace your thermostat.
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Old 07-14-2008, 01:05 AM   #3
kirbykirb
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or possibly sensor.
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Old 07-14-2008, 02:28 AM   #4
Patrick Olsen
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It's unlikely that it's the thermostat. I would try the sending unit first, which will be a bit of a pain in the ass. It's on the coolant cross-over that runs underneath the intake manifold. I think you can get to it without removing the IM, but it won't be easy.
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Old 07-14-2008, 11:28 PM   #5
ballitch
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Make sure to do it when the car is cool, no burns necessary. Probably not the thermostat, but it is definately the one gauge you want to have with that motor...



~Josh~
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Old 07-15-2008, 10:42 AM   #6
fastenova
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Not your usual 1997
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Quote:
Originally Posted by ballitch View Post
Probably not the thermostat, but it is definately the one gauge you want to have with that motor...
That's an understatement! But yeah, I replaced mine and you can do it without removing the intake manifold. It's a pain in the rear though, and it would probably be worth it to just undo the intake man. bolts so you have some wiggle room. It's the larger of the two sensors on the coolant pipe. All of mine have been red. I used a mid-sized extension and a deep socket.

The smaller one is the thermoswitch for the primary fan, I believe.
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Old 07-15-2008, 11:32 PM   #7
badchad
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So, I took the sensor harness off the sensor, mounted the new one, then dropped the sensor part of the new sensor in some close to boiling water. Turned the ignition to accessory and it didn't budge the temp gauge at all. Does the car have to be running to get the temp gauge to kick over?
Any other ideas?
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