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Discussion Starter #1
I know the car will run rich if the thermostatic actuator fails (I believe they fail in a full rich condition) but if there a way to test one off a car? I ask because I have two 2.0 liter engines out of cars, one with a known bad TA and one that is unknown condition.

Thanks!
 

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Yes. Put the bulb in a pot of heating water (do while wife is out of house) with a thermometer in the pot. Check extension of the piston at various temperatures according to the chart, especially at 175F where it should be 27mm, 29mm, or 31mm depending on what model of T/A you have. That's measured from the base of the flange to the tip of the piston.

The 27mm versions are NLA, so it's likely that you don't have one of those, and if you do, it's probably bad. Go here and download the Bench Check Guide. It shows how to bench check the T/A.

http://www.alfabb.com/bb/forums/carburetors-fuel-injection-air-intake/335530-spica-technical-guides.html
 

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Discussion Starter #3
Yes. Put the bulb in a pot of heating water (do while wife is out of house) with a thermometer in the pot. Check extension of the piston at various temperatures according to the chart, especially at 175F where it should be 27mm, 29mm, or 31mm depending on what model of T/A you have. That's measured from the base of the flange to the tip of the piston.

The 27mm versions are NLA, so it's likely that you don't have one of those, and if you do, it's probably bad. Go here and download the Bench Check Guide. It shows how to bench check the T/A.

http://www.alfabb.com/bb/forums/carburetors-fuel-injection-air-intake/335530-spica-technical-guides.html
Thanks John, and sage advice about waiting until my significant other is out of the house!
 
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