1991 Geo Prizm thermostat location

Tiny
STARMAIL7
  • MEMBER
  • 1991 GEO PRIZM
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 81,000 MILES
Is the thermostat under the upper or lower engine raditor hose housing?
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Thursday, September 11th, 2008 AT 5:14 PM

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Tiny
MMPRINCE4000
  • MECHANIC
  • 8,549 POSTS
The lower hose, under the distributor. Two bolts hold the cover on. Make sure you replace the thermostat with an exact match. The thermostat has a small hole in the thermostat. When installed this hole should be at the 11:00 position.

I would get the replacement thermostat from Toyota, just ask for one from a '91 Corolla.
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Friday, September 12th, 2008 AT 4:57 AM

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