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Air Box Thermostat Replacement 200 1991

posted by  Sadie on  Thu Dec 2 03:28 CST 2004
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I searched on this topic two weeks ago without satifactory results. My mechanic showed me how to replace this small device. Take your time as you are dealing with plastic parts and you will need to remove the airbox first.

Air box thermostat replacement requires two people. Remove the thermostat and it's mount from the air box. One person with strong hands compresses the springs holding the thermostat in it's seat. These springs are very stiff! Compress by grasping the base of the mount and the seat of the thermostat. The second person slips the old thermostat out and slips the new one in. This is a 5-10 second maneuver. Compressing the stiff springs is the difficulty because the mount is plastic and the springs are stiff!

Since we have had a week of mornings with 14-20 degree Fahrenheit temps in Salt Lake, I'm glad I have a new thermostat in the air box. Cold starts are not a problem when this device is functioning properly. This is the first replacement in 209,000 miles and coincided with a first replacement of a new (remanufactured) air mass meter. My 240 was gasping for fuel on a local summit.






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