odds are good that you will find no thermostat in your car. also good odds, are you will find a cooling PROBLEM once you get in there. it's possible there is a bad thermostat, as they do fail open often, but odds are not in your favor here. if you JUST picked up the car, it's likely it was "patched" to sell. I'd take it in PRONTO, and have it noted if there was a thermostat in there or not. and go back to the seller if it looks hinkey!

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!