airbox drain hose

deadeye · Posted: Mon Jan 11, 2010 10:17 am Post subject: airbox drain hose

where does the drain hose for the fresh air box go to? Mine is missing and I want to replace it but I can't find where to route it to.

keifernet · Posted: Mon Jan 11, 2010 10:21 am Post subject: Re: airbox drain hose

deadeye · Posted: Mon Jan 11, 2010 10:56 am Post subject:

Sorry, 1970 Beetle

keifernet · Posted: Mon Jan 11, 2010 10:58 am Post subject:

flierbob · Posted: Mon Jan 11, 2010 3:27 pm Post subject:

I have a 69 bug and it came with a huge thick tube that did not work well, I found a hose at Home Depot (black) and stretched it to fit with heat, onto the bottom of the air box and left it long enough to drain out the bottom below the pan after it exits through the hole by the gas tank. My air box did not have the elbow on the bottom or any other fittings.
Bob

jlex · Posted: Mon Jan 11, 2010 7:32 pm Post subject:

I have a '70. The hole the hose gets routed to is pretty obvious. Is in the middle of the trunk just at the edge of the gas tank. First thing I did was to take off the old paper/foil hose and replace it w/ rubber hoses.
Look at the picture. I used about a 1' section of 3/4" hose to hook onto the bottom of the box, then about 4' of 1/2" hose that slipped into the 3/4" hose. (I think those were the right sizes; better double check). Anyway, make sure you have enough hose to drain water out onto the ground, not anywhere onto your frame. The hose comes out around the master cylinder area.

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

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jlex.
'70 std. "Elsie"
'88 Carrera

mnussbau · Posted: Mon Jan 11, 2010 7:55 pm Post subject:

I used 3/4" radiator hose, works perfectly.

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jlex · Posted: Mon Jan 11, 2010 8:03 pm Post subject:

Mike: yeah, I started w/ the same size radiator hose, but tapered it down to half inch. In your pic, it looks like you ended it just after it goes thru the drain hole.... I would recommend the hose be extended all the way down so the water never hits your frame. Should have the hose long enough so it drains water directly to the ground.
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jlex.
'70 std. "Elsie"
'88 Carrera

mnussbau · Posted: Mon Jan 11, 2010 8:31 pm Post subject:

Agreed, ideally the hose goes to ground. The only issue is the amount of clearance between the gas tank and the frame.
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jlex · Posted: Mon Jan 11, 2010 8:43 pm Post subject:

That's why you want to taper it to 1/2 inch hose before it goes into the drain hole. I agree that 3/4" may not be a good fit. With half inch, mine goes over to the left side above the MC, then drains out behind the LF wheel. On your bug, though, it looks like you have two holes on either side of the 'Napoleon hat"... if it was mine, I'd think about running the hose directly thru one of those. Aim is to keep the water away from the frame.
I THINK it's half inch I tapered down to... maybe it's 5/8"... whatever fits directly into the 3/4" hose is what I used. No tape or anything else needed.
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jlex.
'70 std. "Elsie"
'88 Carrera

Habs24x · Posted: Tue Jan 12, 2010 9:24 am Post subject:

I used a 3/4" clear vinyl tube from Lowes. It has a 5/8"Id which dosent fit the elbow. This can easily be solved by heating up some boiling water on the stove and put vinyl tube end in the water for 20 seconds or so and it will pop right on.

Ran it down past the frame head and out the hole opposite the master clyinder. I left a little hanging out and put a couple of tie wraps around it to keep the drain from getting pushed/blown back up the hole.

I used the clear because when I got the car the box,elbow and tube were all clogged with Pine tree needles and other assorted bits of nature.

No problems in clearing the tank the hose is pretty flexible.

mnussbau · Posted: Tue Jan 12, 2010 8:15 pm Post subject:

CarlIseminger · Posted: Wed Jan 13, 2010 9:43 am Post subject:

Did the original hose go all the way past the frame? From what I can see, it just ended right there by the gas tank. I just used a clear tube from Lowe's and ran it to just past the entry hole. There wasn't a hose on mine, and the PO just let the water drain into the trunk.

In my mind, what difference does it make where it ends? If water is draining from the air box, it usually means it is raining, and if it is raining, the underside of the tank area is going to be getting wet too.

keifernet · Posted: Wed Jan 13, 2010 10:41 am Post subject:

Kramer79

Did this today! Worked perfect, coffee mug with hot water!

alex857 · Posted: Tue Aug 14, 2018 11:06 pm Post subject: Re: airbox drain hose

another example,
The hose is extended to the whole in the frame head plate on the passenger´s side to keep water away from the frame as well.

The_Old_Guyyy · Samba Member Joined: July 25, 2021 Posts: 16 Location: AZ

I have a 1971 super beetle and was curious what the route for the drain hose is. Unfortunately I am using a fresh air box instead of the blower that would usually be equipped to model. I am hoping this isn't an issue as this was all I could find. Thanks in advance to anyone who can help!

Maddel · Samba Member Joined: February 12, 2013 Posts: 935

VW 1302 under fuel tank by Joakim Piejko, auf Flickr

The_Old_Guyyy · Samba Member Joined: July 25, 2021 Posts: 16 Location: AZ

67rustavenger · Posted: Sun Jul 25, 2021 6:10 am Post subject: Re: airbox drain hose

Air Box drain elbow,
https://www.wolfsburgwest.com/cart/DetailsList.cfm?ID=113819539
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