Fuel tank missing hoses & missing parts - Questions Options

[PaIsa]

I know I am missing some parts & hoses on the fuel tank for our 1972 914 (1.7L with carb).

I don't have any hoses of any of the three nipples on the expansion tank. I don't have a carbon canister and I am sure I am missing others hoses. I don't have a clear understanding as to where hoses should be connected to.

I guess that the expansion tank nipple(s) are to be connected to the carbon canister, but looking at some sketch found on the web, 2 nipples seem to be connected together and seem to go down as a drain. The one near the filler neck seems to be the one connected to the canister. Is it like this?

For the carbon canister, the sketch shows 2 hoses that I assume have to go to the back of the car to sent the fumes in the air intake. Probably a stupid question, but why 2 hoses? Also, being on carb, where should I sent these hoses to?

Anyone has a good sketch showing the schematic of these hoses for a carb engine?

Thanks

[mgphoto]

Your car looks to be in very nice shape, you need to check if the vacuum hoses are still connected to the engine, the hoses run under the driver side rocker panel and attach to the fan housing on the engine.

[PaIsa]

Your car looks to be in very nice shape, you need to check if the vacuum hoses are still connected to the engine, the hoses run under the driver side rocker panel and attach to the fan housing on the engine.

Yes the car is in good shape but I still have a few bits and pieces to sort out. Fuel vapor is one that I would like to sort out. I will look for the hoses that should go back to the engine compartment. Worst case, I will reinstall new ones.

One the other side, I would be very interested in having sketches or better image of the different hoses around the expansion tank and where they connect to.

[914werke]

While you can replace the charcoal can & lines for the vapor recovery, you said your car has carbs. You need to plumb them to containing collect & burn those fumes.

[PaIsa]

While you can replace the charcoal can & lines for the vapor recovery, you said your car has carbs. You need to plumb them to containing collect & burn those fumes.

From the search I have done and some sketch I have seen, my understanding is that the charcoal canister is ventilated using air coming from the cooling fan and the outlet of the canister is sent back to the engine to be burn. So I found answer to my question as to why 2 lines going from the front to back.

Being on carb, I guess I would have to send the outlet of the charcoal can into the air filters of the carb so that the fumes make there way to the intake. Would that work?

[mgarrison]

I believe this may help...

[PaIsa]

This helps, but I am still a bit puzzled when comparing what you sent and the attached image, mainly around the highlighted hoses. I guess the expansion tank is connected to the nipple near the filler neck but I don't get the TEE and what seems to be a drain.

[Steve]

The bottom part in yellow is for cars without a charcoal canister. The expansion chamber connects to a "T" that connects to the filler overflow that goes under the car.

[PaIsa]

The bottom part in yellow is for cars without a charcoal canister. The expansion chamber connects to a "T" that connects to the filler overflow that goes under the car.

Ok, so without a charcoal canister you vent everything to the ground.
Thanks for the info.

[Steve]

The bottom part in yellow is for cars without a charcoal canister. The expansion chamber connects to a "T" that connects to the filler overflow that goes under the car.

Ok, so without a charcoal canister you vent everything to the ground.
Thanks for the info.

Yep!! If you do a search, some people say this works for them and they don't smell any gas fumes in the car or outside. I park both my 914's in the garage with the windows rolled up. Both cars had horrible gas smell in the car, so I added the expansion tank on the gas tank and charcoal canisters in the engine compartment. No more gas smell ever. The advantage of putting the canister in the engine compartment is that you only have to run one line. The 75-76 cars ran a single line through the tunnel to a canister in the engine compartment. If you still have the plastic lines down the drivers side through the rocker panel, then I would just reuse those and mount the canister in the stock spot on the gas tank.

[PaIsa]

The bottom part in yellow is for cars without a charcoal canister. The expansion chamber connects to a "T" that connects to the filler overflow that goes under the car.

Ok, so without a charcoal canister you vent everything to the ground.
Thanks for the info.

Yep!! If you do a search, some people say this works for them and they don't smell any gas fumes in the car or outside. I park both my 914's in the garage with the windows rolled up. Both cars had horrible gas smell in the car, so I added the expansion tank on the gas tank and charcoal canisters in the engine compartment. No more gas smell ever. The advantage of putting the canister in the engine compartment is that you only have to run one line. The 75-76 cars ran a single line through the tunnel to a canister in the engine compartment. If you still have the plastic lines down the drivers side through the rocker panel, then I would just reuse those and mount the canister in the stock spot on the gas tank.

Thanks for the good info. As I said, I will do some investigation as to if the hoses are still on the car. I have photos that lead me to beleive that they are still there.

My plan is to have a charcoal canister reinstall as there is a bit of smell in the garage and as well in some particular occasion when driving. As well, I don't like to see parts missing!

[PaIsa]

So just got back near the car yesterday and took a look to see if the hoses running from front to back where still there, and they are not!

So for now, I will go with the no canister option and hose everything to the ground. I will look deeper at my option during the winter.

I will as well block the ventilation hole in the engine cooling system since this is not hooked up and is blowing cooling air to nowhere.