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Old 07-22-2010, 03:55 PM   #1
Not-EWRX
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Default Mom's Legacy is overheating

My mom's 2000 legacy outback is overheating when she drives up hills. I'm kind of at a loss as to what it could be. No CEL's. She says it's not burning coolant. She also says that there isn't any air in the radiator cap. She also said that she recently had her A/C system serviced (but didn't know the extent of the service. Could there be air trapped in the system? Should she try and burp the system somehow? What are some other issues that could be causing this problem?
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Old 07-22-2010, 03:58 PM   #2
06HAWKMAN
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I would put the front wheels on jack stands, start it up, turn on the heater and rev it up to 2 grand once the engine is up to operating temp, and see if any air bubbles come out, then top it off and wham. done hopefully
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Old 07-22-2010, 04:16 PM   #3
Not-EWRX
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So lifting the front helps get the air out? Is it feasible that a little amount of air can make it overheat like that?
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Old 07-22-2010, 05:06 PM   #4
bhhamblin
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Blown head gasket, bad radiator cap, bad thermostat also check and see if the fans are even turning on..

Just some things to look into.
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Old 07-22-2010, 05:12 PM   #5
SkiWrex
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Quote:
Originally Posted by bhhamblin View Post
Blown head gasket, bad radiator cap, bad thermostat also check and see if the fans are even turning on..

Just some things to look into.
+1

My brother's 2001 outback was having the same symptoms, It was his head gasket and water pump.
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Old 07-22-2010, 05:27 PM   #6
DLC
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Probably headgasket.

Has it had the coolant conditioner?
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Old 07-23-2010, 07:15 PM   #7
phattydrummer
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Sniff the coolant in the coolant overflow bottle. Its very common that exhaust gets in the coolant (blown head gaskets) which will cause overheating, especially on heavy loads.

Also, if its really bad, you can get the car up to temp and pop the lid on the reservoir bottle. Put the car in park/neutral and manually rev the motor while looking into the overflow bottle. If you see little bubbles come up out of the coolant, you have bad head gaskets.

It is very common for those 2.5L non turbo head gaskets to go out. Here at our shop, we see several Subarus a month with this very problem. I am doing head gaskets on one right now!
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Old 07-23-2010, 08:28 PM   #8
DLC
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If she did just have the AC serviced, perhaps something is making it so that both fans don't kick on when the AC is turned on. Check that first.
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