overheating

SUBARU
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BSTAFFORD
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1998 Subaru Outback 140,000 miles. Runs fine on level, overheats (on gauge) going uphills, cools down in minutes. Compression check passed, new thermostat, radiator and cooling system checked out o.k. Any suggestions- has the Subaru mechanics stumped![/b]
Jan 7, 2007 at 4:04 PM
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what size motor?

Whas the actual temperature of the motor taken with a scanner? That is checked independently of your gauge. I'm questioning the coolant temp sensor for the gauge.
Jan 7, 2007 at 5:30 PM
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BSTAFFORD
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It is a 2.5 engine and I'm not sure if the sensor was tested or not.The Subaru garage said that even though the compression test was fine it may have a blown gasket internally. Make sense to you? Thanks fo the help!
Jan 7, 2007 at 5:53 PM
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It doesn't make sense to me, but there are a lot things in this industry that don't either. :?

Ask them to explain it. Where would the breech potentially be? Between what and what?
Jan 7, 2007 at 6:00 PM
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MATHIASO
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Is the cooling fan operating properly?If an air dam is damage and is not dircting enough air up into the radiator.
Jan 7, 2007 at 11:56 PM
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ADG
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I HAVE THE SAME PROBLEM.
I USE THE ENGINE IN A GYROPLANE CHEK COMPRESSION,CAHNGE THERMOSTAT,CHANGE WATTER PUMP, CHANGE RADIARTOR, CHANGE SENDING TEMP UNIT, CHANGE TEMP METER, HOSES TO RADIARTOR AND THEN, CHANGE THE ENGINE FROM 2.2L TO 2.5L TO GET MORE POWER, I THOGHT THAT, THAT WAS GOING TO TAKE CARE OF THE OVERHEATING, BUT NOT.STILL THE SAME. IN THIS APPLICATION THERE IS NO NEED FOR THE FANS BECAUSE THE PROPRLLER IS WRITE BEFORE THE RADIATOR. . I'M SURE NOW THAT IT HAS TO DO WITH THE LINES THAT GO TO THE RADIATOR OR THE RADIATOR IN THE HEATING SYSTEM FOR THE CABIN. TOMORROW I WILL JUMP THAT RADIARTOR AND TRY IT AGAIN. IF THIS IS NOT, NOW I HAVE NO IDEA WHAT ELSE COULD IT BE. IF YOU HAVE ANOTHER IDEA PLEASE LET ME NOW.
THANK YOU
Aug 29, 2007 at 1:00 AM
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We just had a 2.5 in the shop for a bad headgasket. Dealer says they do em quite a bit. This one was on the #4 cylinder. Try a compression test and cylinder leakdown test. In the meantime fly low!


https://images.2carpros.com/forum/automotive_pictures/30961_scarry_4.jpg

Aug 29, 2007 at 4:41 AM
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