1991 Geo Prizm thermostat location

1991 GEO PRIZM
81,000 MILES • 4 CYL • FWD • AUTOMATIC
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STARMAIL7
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  • 1 POST
Is the thermostat under the upper or lower engine raditor hose housing?
Sep 11, 2008 at 5:14 PM
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MMPRINCE4000
  • ✓ASE Certified Mechanic
  • 8,548 POSTS
  • ASE Certified Mechanic
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.
Sep 12, 2008 at 4:57 AM
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