Plug in engine bay

[Vintage man]

Please can someone tell me what is the plug on the right side in the engine bay for.
Second question,the fuel vapor pipes that are in the engine bay ,where do they connect it's the 2 steel pipes that are on the top of the bay,I see on google they join with a t piece but from there where do they go.

[Vintage man]

Picture of the plug sorry it's not clear

[acpaterson]

Hi there,

the plug is possibly the top of your generator\alternator. Its usually a 3 Pin black rubber plug that connects to the regulator.

The thin breather pipes come from the tank, go up in the rear cooling quarters, back down, and join via a rubber Tee piece, and usually "breathe" back into the carb's air filter.

[acpaterson]

oops, sorry, just saw that now. Not the same plug.

[Vintage man]

Thanks I thought the vapor would feed back to air cleaner,

[acpaterson]

I have something similar in mine. Never used it so can't help you.

[acpaterson]

Air filter\cleaner, same thing.

[Vintage man]

Big thanks,

[retrovan]

The big multi pin plug is the factory fitted Diagnostics plug that they would have used for the service and repair of your bus.

These had connections to lights, coil, and other things that would show up on early computers.

The vapor pipes that you find in the bay, comes from the air pocket on the top left of your tank, goes to the right of the bus air intake duct up to roof height into a volume increase tube and down to the engine compartment where it is connected behind the engine flap to the mirror image one coming from the left of the tank to the right.

This was to give any splashing fuel a chance to settle and feed back to the tank again, with the vapors being allowed to neutralist pressure.

For your own safety, take the tank hiding plate off, and fit new pipe sections over the joints and fit clamps as the original had no clamps and leaked, making a fire hazard. I think there are 5 joints in total, and all in bad places to reach. If you have a fire in the engine bay, these will all push out vapor, and make extinguishing of the flames impossible.

When my tank dumped all the fuel on my garage floor one night, I found all these joints suspect and leaking, and a fire hazard.

I have removed all these pipes as no other car has them, and I feel they are not needed.

I have joined the two tank outlet breathers together and to the filler breather, and it works perfect, like all modern cars.

Good Luck

Herman

[sean]

As standard on the type 4 motors, there is a plug just on top of the air filter housing. The pipe from the T-piece plugs in there.

[Vintage man]

Thanks Sean ,once again awsome advise.

[bugspray]

the Diagnostic plug as already mentioned was for service use. how cool it would be to find one of those computers now??
most rewired bugs cut of that plug.... if its still connected there's a cool party trick wiring diagram on the samba that shows you how to hotwire the starter from that plug ans start the car.