The car is a 1972 super beetle (ej20 conversion incase it matters), and the fuel tank venting system has been removed I was wondering if someone could explain how it should be installed, and if its all necessary for road worthy inspection etc? Are there any alternatives to use instead? Thanks in advance for your help.

This chamber goes up under the cowl panel, right behind the rear edge of the bonnet opening. All the hoses go to the fuel tank, except for one which will vent somewhere, either to a charcoal canister or to atmosphere. I believe the idea is that fuel vapour can condense in this chamber and drain back to the tank. My S-Bug didn't come with this chamber, so I had to replicate it by looping breather hoses up high behind the dash. Basically, as long as you have a breather hose looping up high and then venting somewhere outside the car (in a fender well or under the spare wheel well), you will be pretty right.

In South Australia, you shouldn't need a roadworthy inspection, unless it is part of getting your engine conversion properly engineered. If so, ask the engineer what his requirements are. He would probably suggest to get rid of all this old-school system and use a single charcoal canister as per the Subaru setup.

Yes that's a condenser for under the windscreen scuttle panel. The top righthand outlet is meant to go via pipework to a charcoal cannister mounted under the rear passenger wing. Even if you do vent it to air then it should vent past the rear qtr panel/wing join so the fumes aren't drawn back into the vehicle cabin

Hi

Beetles didn't have carbon cannisters fitted until 1975. All you really need for a stock 72 Beetle is a bit height in the breather hose so that expanding fuel doesn't spill out, the venting system you have a photo of was dumped on later supers.

My old 72 super just had a piece tube that ran across the scuttle and vented to atmosphere.

When my 1973 Subaru powered bug was checked by the engineer and the RMS it had to have a functioning carbon cannister and other pollution gear associated with the a 2003 model motor, two cats etc

But as suggested talk to your engineer about what is needed.

Steve

yep what ever your car had stock, Fuel tank venting

is a part of the car. nOT motor

Australia was pretty laid back with emissions laws back then.

It's hard to find any sort of diagram as our cars differed from overseas.


When they first released the Superbugs here in 71 they had the overseas tank breathers but no charcoal canister but that was dropped pretty quick.

If your tank has the 2 port on the top left corner and one below the fuel filler neck it would have had one originally.

I wouldnt worry though, mine is 74 and passed engineering for a EJ25 without one.

Thanks everyone! I think for now then I'll connect it up with a loop and if the engineer or inspection pick it up I'll change it then.

depends where the petrol smell goes in hot weather..lol

Mine hose ends up next to the spare wheel on the LHS
a metal pipe goes thru the hole..

the hose goes up above the dash across and down to the pipe..

I just hate thinking that there are very inflammable petrol fumes there. lol

LEE

Hi

I don't know what VW were thinking when they put all those breathers in the tank to hook up to that big plastic thing.

They came to their sense later on and deleted almost all of the small breather connections.

I just used factory tee section and then ran tube up in a loop and then ran a hard plastic tube to a carbon canister mounted under my right rear mudguard.

Steve