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2005 Subaru Forester temperature fluctuations?
My Forester purchased used about 1 1/2 years ago has 124, 000 miles on it. When the outside temperature drops below 50 and I drive at 65to 75 mph, the temperature gauge climbs. It has never gotten above what I would call the 3/4 line on the dash indicator (and never even close to the red area) , but I always slow down if I see it climbing. If I stay around 60 or less, I don't seem to have that problem unless climbing steep hills. It also does this sometimes when driving thru snow which is particularly wet and deep enough to splash into the bottom of the engine. It never happens in warm weather.
My mechanic doesn't seem worried about it, but I don't want it to become a big, expensive fix and I sure don't want to be stranded anywhere this winter.
Anyone else have this problem or some experience with this issue?
Thanks!!
2 Answers
- golgafrinchamLv 61 decade agoFavorite Answer
A few guesses (I am guessing your mechanic has checked all these, and none of them are huge issues):
temp sensor is off -- unlikely, but ignore or replace as you see fit
air in the cooling system -- telltale sign, you will usually hear some gurgling noises behind the dash when starting the car; air near sensor may give false readings; have mechanic bleed/purge air out of system
"incorrect" coolant mixture -- in places of extreme cold or heat the coolant may be mixed 40/60 or even 30/70 to prevent freezing and/or boilover, thus allowing temps to go above midline on gauge; ignore or change coolant to 50/50.
Source(s): When in doubt: http://www.cartalk.com/ - ?Lv 44 years ago
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