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Old 03-22-2004, 12:12 AM   #1
Scooby Newbie
Member#: 57813
Join Date: Mar 2004
Location: Virgina
1999 Legacy SUS

Default 99 legacy sus temp guage

I have a 99 sus, i love the car but dont know much about the model as far has performace highlights, or why the car is special(30th aniv edit). I did a search and found nothing, im inquiring about some specs, and if there is an issue with the temp guages on this model. The guage will go to 3/4 below hot, coast down to level(middle) at acceleration, or idel, and dip to 1/4 above cold. What i am saying is the guage is doing its own thing , and i dont know if it is an overe heating issue or guage problem. I have 107,818 miles on the car. Any insight would be appreciated, on specs and this guage issue.

Thank You
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Old 03-22-2004, 12:40 AM   #2
Scooby Specialist
Member#: 30727
Join Date: Dec 2002
Chapter/Region: South East
Location: Orlando, FL
2000 Legacy B4 RSK
*Formerly subyluvr2212*


Does it go into the red part of the temp gauge? If not I wouldn't be terribly concerned over it. It's possible the gauge could just be normally fluctuating. My XT can approach the upper 2/3rds of the temp gauge and I have not had any problems yet.
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Old 03-22-2004, 09:13 AM   #3
Scooby Guru
Member#: 52324
Join Date: Jan 2004
Chapter/Region: NESIC
Location: Pelham, NH
2011 WRX LTD (FS)
1990 T30 miata


when was the last time you did a coolant flush? a REAL flush, not just a drain and refill
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Old 03-22-2004, 10:07 AM   #4
Scooby Specialist
Member#: 41012
Join Date: Aug 2003
Chapter/Region: E. Canada
1998 Legacy L


or... it could be a simple and most probable solution. Its probably just a bad Thermostat... theyre pretty cheap and easy to replace.

also, www.cars101.com is good for general information

I beleive this is your car
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Old 03-22-2004, 02:01 PM   #5
Scooby Specialist
Member#: 12535
Join Date: Nov 2001
Chapter/Region: NWIC
Location: Idaho slash Washington
vf39 06 5MT XT
92 Legacy Rally EG33'd


well my temp gauge stays in one spot at all times, until i was having troubles with my water pump leaking coolant and lowering the level of the coolant in the system, then I had symptoms akin to yours.

Our coolant temp sensors are at the top of the engine, it doesnt take a loss of very much coolant before the sensor is only touching hot air and steam.

i think if the thermostat was bad ( stuck open or stuck shut) it would read hot(shut) all the time or cool all the time.

try bleeding any air out of the system.
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Old 03-22-2004, 02:14 PM   #6
*** Banned ***
Member#: 36269
Join Date: May 2003
Location: Marin and Santa Cruz
1999 Legacy SUS


I hate to tell you this, but thats not normal at all. On my SUS the temp gauge reading stays just below the half way mark at all times. It shouldn't move at all. I think you have a bad thermostat, which has already been mentioned before.
hope this helps.

white is the best color.
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Old 03-22-2004, 03:19 PM   #7
Scooby Guru
Member#: 5039
Join Date: Mar 2001
Chapter/Region: South East
Location: Ocean Springs, MS
2007 Outback XT
Grey 5-speed


Something is definitely wrong. The temp should not fluctuate much at all. Could be a bad thermostat, electric fan, or water pump. You need to get it checked out or you could be visited by the bad head gasket fairy.

Either of you SUS guys want to part with your grille?

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Old 03-22-2004, 04:16 PM   #8
Scooby Newbie
Member#: 57813
Join Date: Mar 2004
Location: Virgina
1999 Legacy SUS


Thank You for your responses,
The car is still under the warrenty i recieved, so will have it checked over, i did not think temp guages were supposed to fluxuate. Like i said turning on the heat does nothing, the temp will fall at acceleration. The temp never reaches above (H) hot, but just below it and never falls below (C) cold just a 1/4 above. As for coolant flush, i have not done one, and am not sure if the dealer did one.

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