Cooling system

Tiny
JJC
  • MEMBER
  • 1996 SUBARU OUTBACK
  • 4 CYL
  • AWD
  • AUTOMATIC
  • 185,000 MILES
I have 96 Subaru Outback with a 2.5 l, SFI engine. When the outside temp is above 30 deg the engine does not over heat, but when the temp drops below 20 deg the engine will overheat. This started happening after a radiator hose blew and I replaced the hoses, radiator cap and thermostat. What could be causing this to happening?
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Saturday, January 29th, 2011 AT 6:30 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
Did you replace the coolang with a 50/50 mix of coolant and water?
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Friday, February 11th, 2011 AT 2:14 PM
Tiny
JJC
  • MEMBER
Yes I did use a 50/50 mix. The problem was the new thermostat, I checked it in water and the 170 deg thermostat started opening at 175 and not 170. I put in a new thermostat that opens at 170 and my problem went away, even down to -20 deg. Thanks jjc
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Saturday, February 12th, 2011 AT 12:46 AM
Tiny
JACOBANDNICKOLAS
  • EXPERT
That's good. I was thinking the coolant was starting to freeze when it got too cold.
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Saturday, February 12th, 2011 AT 5:05 AM

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