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Airbox valve questions 200 90

posted by  someone claiming to be Buzz on  Fri Nov 24 10:59 CST 2000 [RELATED]

At approx. what temperature will the airbox valve go from the fully hot (heated air) to the fully cold position?

How long does the valve take to switch from one air source to the other?

I was wondering because I drove my 244 into a heated (60°) garage from outside (25°) to replace my airbox preheat hose. When I took the airbox apart to check the filter the valve was in the hot position. After a couple of hours when I got things put back together, the valve was SLOWLY closing to the cold position.

Also, what is the factory setting as far as induction air temperature?







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    Re: Airbox valve questions 200 90

    posted by  someone claiming to be Jerry Andersch on  Fri Nov 24 15:58 CST 2000 [RELATED]

    Brian,

    The door to the pre-heater should be fully closed above 60 degrees F. I'm not sure exactly how quickly it should close. Probably pretty slowly. If it doesn't and stays open drawing hot manifold heated air when ambient temps are high ... it's widely thought you'll eventually fry your Air Mass Meter. Yours seems to be closing but I'd check it again when warm weather returns. The thermostat in the air box that controls it is easy to replace and about 15 bucks. Much cheaper than a $200-$300 AMM. Some brick owners just block off the pre-heater inlet rather than chance a problem. I replace the T-stats when they go bad. That after having one stay open and yes I did have an AMM failure. Like I said in cold weather it shouldn't be a problem and yours still seems to be working.But keep an eye on it.






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