Overheating

BSTAFFORD

MEMBER
SUBARU

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]

6 Replies

SERVICE WRITER

MECHANIC
9,123 POSTS

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.

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Sunday, January 7th, 2007 AT 5:30 PM

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!

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Sunday, January 7th, 2007 AT 5:53 PM

SERVICE WRITER

MECHANIC
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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?

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Sunday, January 7th, 2007 AT 6:00 PM

MATHIASO

MECHANIC
1,209 POSTS

Is the cooling fan operating properly?If an air dam is damage and is not dircting enough air up into the radiator.

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Sunday, January 7th, 2007 AT 11:56 PM

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