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Air filter basic question
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plarson3
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PostPosted: Thu Apr 25, 2024 4:08 pm    Post subject: Air filter basic question Reply with quote

Image may have been reduced in size. Click image to view fullscreen.


Dumb question - is this air filter a standard fit and therefore easy to replace or might it be specific fit to this carb?
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busdaddy
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PostPosted: Thu Apr 25, 2024 4:12 pm    Post subject: Re: Air filter basic question Reply with quote

It's a somewhat standard aftermarket filter to fit aftermarket carbs like yours. Between that carb, no preheat and the 009 that thing must run like absolute crap. And where is the crankcase breather venting?

Ever worry about that fuel line getting caught in the pulley?
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PostPosted: Thu Apr 25, 2024 4:24 pm    Post subject: Re: Air filter basic question Reply with quote

busdaddy wrote:
It's a somewhat standard aftermarket filter to fit aftermarket carbs like yours. Between that carb, no preheat and the 009 that thing must run like absolute crap. And where is the crankcase breather venting?

Ever worry about that fuel line getting caught in the pulley?


- So if I find one that appears to be the same fit I should be good it sound like?
- No preheat? Please explain; I am a rookie.
- 009? Same request.
- I do need to move the fuel line/filter away from the pulley....
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PostPosted: Thu Apr 25, 2024 4:42 pm    Post subject: Re: Air filter basic question Reply with quote

Most VW parts stores will offer a filter for the progressive kit, most have the same base dimensions, many are available in a few different heights. That one can be washed in solvent and re oiled, but they are such crappy filters it's hardly worth the effort and chemicals.
They are loud, and let lots of grit through.

The stock air cleaner includes a preheat system that uses warm air from under the engine to keep the intake air a constant 90 (ish) degrees, it improves fuel atomization which helps prevent hesitation and boosts fuel economy, it also prevents icing which causes stalling on cool or moist days. It also provides a way to vent the crankcase back into the intake as well as filtering any air that might get sucked in to that system.

The 009 is the distributor you have, it deletes the vacuum advance because that carb doesn't work with most VW units, it's renowned for a flat spot when you step on the gas, and it's most likely an Asian clone so the advance curves could be damaging your engine. There's always some clown who comes along and says "I've run one of those my whole life and it's fine", they clearly have never experienced how nicely a well tuned VW can run.
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PostPosted: Thu Apr 25, 2024 4:53 pm    Post subject: Re: Air filter basic question Reply with quote

Looks like a generic rectangular filter element. Just measure the sides and get the same size.

2 1/2 Inch High, 6 3/4 Inch X 4 1/2

Here ya go: https://www2.cip1.com/acc-c10-5643/
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PostPosted: Thu Apr 25, 2024 8:14 pm    Post subject: Re: Air filter basic question Reply with quote

Just FYI ... This photo from the gallery is labeled as from a '73 Super. Not the original engine, but this shows the crankcase breather and preheater busdaddy was describing. Also uses an earlier oil bath air cleaner ... which is preferred by many ... a whole different discussion and one worth looking at sometime if you're interested in the topic.

This actually shows a later oil bath air cleaner, but was used earlier than the stock '73 air filter.


Image may have been reduced in size. Click image to view fullscreen.

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PostPosted: Fri Apr 26, 2024 3:50 am    Post subject: Re: Air filter basic question Reply with quote

As mentioned it is not an unusual filter I have one in my stash that's the same foot print but is not as tall. Fuel filter should be under the tank not in the engine compartment let alone routing it for failure. I also noticed a lot of threads proud of the alternator pulley nut. Check belt tightness and verify you have enough shims between halves and under cupped washer so the nut does not run out of threads.
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PostPosted: Fri Apr 26, 2024 9:48 am    Post subject: Re: Air filter basic question Reply with quote

One reason I asked about the air filter - lately it has been producing a lot of smoke from the exhaust when first started and running cold.

AND, when it warms up - it has been stalling some recently. Then it won't start again until it cools down. Thoughts? Is this a carb adjustment issue? Running too rich?
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PostPosted: Fri Apr 26, 2024 10:35 am    Post subject: Re: Air filter basic question Reply with quote

Could be plenty of things, the symptoms point to too rich, now whey is it like that?
Choke sticking, misadjusted or heater wire fell off?, float level too high?, float sinking or sticking?, fuel pressure too high?, dirty air filter?
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PostPosted: Fri Apr 26, 2024 12:09 pm    Post subject: Re: Air filter basic question Reply with quote

OldSchoolVW's wrote:
Just FYI ... This photo from the gallery is labeled as from a '73 Super. Not the original engine, but this shows the crankcase breather and preheater busdaddy was describing. Also uses an earlier oil bath air cleaner ... which is preferred by many ... a whole different discussion and one worth looking at sometime if you're interested in the topic.

This actually shows a later oil bath air cleaner, but was used earlier than the stock '73 air filter.


Image may have been reduced in size. Click image to view fullscreen.

He has an aftermarket carb, so the stock oil bath won't fit.
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PostPosted: Fri Apr 26, 2024 12:25 pm    Post subject: Re: Air filter basic question Reply with quote

busdaddy wrote:
Could be plenty of things, the symptoms point to too rich, now whey is it like that?
Choke sticking, misadjusted or heater wire fell off?, float level too high?, float sinking or sticking?, fuel pressure too high?, dirty air filter?


Thank you again for helping to educate me. Follow ups:
- not familiar with the heater wire - where is it and what does it look like?
- what would cause high fuel pressure?
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PostPosted: Fri Apr 26, 2024 12:49 pm    Post subject: Re: Air filter basic question Reply with quote

plarson3 wrote:
busdaddy wrote:
Could be plenty of things, the symptoms point to too rich, now whey is it like that?
Choke sticking, misadjusted or heater wire fell off?, float level too high?, float sinking or sticking?, fuel pressure too high?, dirty air filter?


Thank you again for helping to educate me. Follow ups:
- not familiar with the heater wire - where is it and what does it look like?
- what would cause high fuel pressure?
Trace the wires off the + side of the coil. Looks like you have 4. One is key on power, one goes to the electronic module in the distributor (it's red) one goes to the reverse light switch in the transaxle and one should go to the choke on the carb. Round black plastic with tab in the middle. Clamped in place with a triangle looking ring with three screws. The fuel pressure can be adjusted with gasket(s) under the fuel pump.
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PostPosted: Fri Apr 26, 2024 2:35 pm    Post subject: Re: Air filter basic question Reply with quote

busdaddy wrote:
It's a somewhat standard aftermarket filter to fit aftermarket carbs like yours. Between that carb, no preheat and the 009 that thing must run like absolute crap. And where is the crankcase breather venting?

Ever worry about that fuel line getting caught in the pulley?


Yeah, that!
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PostPosted: Fri Apr 26, 2024 7:35 pm    Post subject: Re: Air filter basic question Reply with quote

bsairhead wrote:
plarson3 wrote:
- what would cause high fuel pressure?

The fuel pressure can be adjusted with gasket(s) under the fuel pump.


You might want to give this discussion a look ...

https://www.thesamba.com/vw/forum/viewtopic.php?t=611649&highlight=adjust+fuel+pressure

Though a time consuming (trial and error) process, you can add/subtract gaskets to dial in the fuel pressure. Grinding the rod is a one way trip ... grind too much and you can't go back.

Most would advise against a fuel pressure regulator to address a high fuel pressure problem. It would need to be in the engine compartment, it can (often times will) leak ... and that would be a very bad thing in a hot engine bay with several ignition sources available.
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"If you don't do it this year, you'll be one year older when you do." Warren Miller

"But I also have to say, for the umpty-umpth time, that life isn't fair. It's just fairer than death, that's all." William Goldman

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PostPosted: Mon Apr 29, 2024 12:14 pm    Post subject: Re: Air filter basic question Reply with quote

Two related questions:

- If the car eventually starts but then stalls after a minute, is that always fuel/carb related, or could it maybe be spark related?
- I noticed some gas spray inside my air cleaner. Is that normal or a concern?
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