AMC Eagle Den Forum
The Mighty 258 => The Engine => Topic started by: GECKO77 on August 17, 2021, 08:48:57 PM
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Hello, im currently restoring an old sx4 that i bought and noticed that there are some strange flaps in the air intake , they seem to be vaccum activated... Do i need them? What do they do?
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If they're what I think you're talking about, they cut off the cold air till the engine warms up to help it run better.
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Yea makes sense ,thx
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One flap is the heat stove inlet and is operated by the Thermostatic Air Cleaner valve to pull warm air in when the air temperature is too cold (helps a lot when its cold outside). The other is the vapor control door and seals the air cleaner off when the engine isn't running so evaporating gas doesn't escape.