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Wendle Willkie
Samba Member
Joined: November 24, 2022
Posts: 20
Location: 78704
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 Posted: Wed Nov 30, 2022 10:23 am Post subject: air cleaner flap |
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how does thiis system work- any diagrams out there i could reference
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busdaddy
Samba Member
Joined: February 12, 2004
Posts: 51150
Location: Surrey B.C. Canada, but thinking of Ukraine
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baldessariclan
Samba Member
Joined: October 14, 2016
Posts: 1384
Location: Wichita, KS
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| Posted: Wed Nov 30, 2022 10:59 am Post subject: Re: air cleaner flap |
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There are two flaps in that air cleaner snout.
The first one (i.e. closest to opening in end of snout) is for the heated-air intake system, and operates via a cable connected between the flap's arm and the thermostatically controlled air flaps at the bottom the fan shroud. That system is used to draw heated air into the carburetor when cold, to help speed engine warm-up time, plus prevent carburetor icing issues as well.
The second one (with weighted arm) is used for the crankcase breather / scavenger system. It normally restricts air coming into the snout, causing a bit of low pressure or "vacuum" behind it. This helps to draw crankcase blow-by fumes up through the hose which attaches to nipple right behind that flap. The crankcase fumes then pass through the carburetor for re-burning.
For "diagrams", recommend you check the Bentley service manual, and/or the illustrated parts catalog for these cars: http://oacdp.org/type1part.html
_________________
1971 Standard Beetle — fairly stock / driver
baldessariclan -- often in error, never in doubt...
Last edited by baldessariclan on Thu Dec 01, 2022 6:27 am; edited 1 time in total |
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Wendle Willkie
Samba Member
Joined: November 24, 2022
Posts: 20
Location: 78704
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| Posted: Wed Nov 30, 2022 7:32 pm Post subject: Re: air cleaner flap |
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| utterly amazing |
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