Gas Tank evaporating tank?

Would anyone have the " tank " that is located in the left fender between the trunk charcoal filter and the air filter box, for a 70' 911 T. My car came without it, runs great without it, but I'm doing a slow restoration and wouldn't mind reinstalling any missing original parts !!!
Thank you.
Thierry
Woodstuff@juno.com

Thierry,

I disconnected my evap tank too. I removed the hose from the engine crankcase and I put a bypass hose on my air box. I am thinking about installing a K&N crankcase filter in the future directly to my engine. Personally, I would leave the evap tank, charcoal filter, and hoses disconnected. From what I read in my Hayne manual, these items were installed only on porsches destined for North America. That charcoal filter is supposed to be replaced "only in high mileage situations...60000 miles" That seemed funny to me. I have yet to see a company that offers these charcoal filters or the evap tank, but I would hate to see what they would cost you if they did. I need a windshield reservoir, but that little item is over $100.

In conclusion, bypass and remove the whole system and install a K&N...your car will probably thank you. Hope this helps.

Bill


------------------
William Armentrout
1973 911T
2.7 carerra rs specs
www.geocities.com/william_armentrout

Bill,
exactly how does this setup work? I have a '76 with CIS. The evap tank(it's the one in the driver side fender, right?) is out of the car. The hoses broke(yeah...broke) off, now I've got two holes inside the fender. I figured out where the charcoal canister is, it's on the passenger side of the engine compartment, right? What hose would I take off from the engine crankcase and where would the bypass hose go from and to? Plus where would the crankcase filter go? Please help! Oh yeah sometimes you can get the windshield reservoir on eBay. I got mines there and although not in perfect condition, I paid $40 for it. Good Luck, and Thanks!

------------------
Jeff
1976 911S

Bill,
exactly how does this setup work? I have a '76 with CIS. The evap tank(it's the one in the driver side fender, right?) is out of the car. The hoses broke(yeah...broke) off, now I've got two holes inside the fender. I figured out where the charcoal canister is, it's on the passenger side of the engine compartment, right? What hose would I take off from the engine crankcase and where would the bypass hose go from and to? Plus where would the crankcase filter go? Please help! Oh yeah sometimes you can get the windshield reservoir on eBay. I got mines there and although not in perfect condition, I paid $40 for it. Good Luck, and Thanks!

Jeff
'76 911S

[This message has been edited by Rufblackbird (edited 07-07-2000).]

Jeff,

On my 1973 911T, this is how my setup works...

There is a hole in the crankcase(right in front of the engine fan when facing the engine) which has a hose that runs to the front driver's side fender into the expansion tank. A hose then runs from there into the sheetmetal. A hose then runs from there into the charcoal canister(located on my car on the driver's side of the trunk just laying there). A hose then runs from the charcoal canister back into the sheetmetal. The hose then runs back to the engine and into the airbox assembly to the opposite side of the attachment that connects the oil tank hose.

The purpose of this system is to burn off crankcase fumes using the engine intake. My hoses were also cracked, and I am sure that the charcoal filter is not really doing what it should have been doing. I just disconnected the hose at the engine and disconnected the hose on the intake. Later on, I am going to add a small K&N filter to the top of the crankcase...Automotion sells the filter kit if I remember correctly. All this kit contains is a short(<1") hose and a small filter. This filter/hose simply sits on top of the crankcase and "filters" crankcase gases before they are let out into the atmosphere.

I would disconnect everything, otherwise you may be getting fumes into your trunk and indirectly into the passenger compartment. Let me know if you have any more questions. Thanks for the tip on the windshield reservoir.

Bill

------------------
William Armentrout
1973 911T
2.7 carerra rs specs
www.geocities.com/william_armentrout

Disconnecting this sucker until/unless the crusty old hoses are replaced sounds like a good idea to me too. I doubt the canister is really doing anything and the 20 ft. of hoses are probably leaking like crazy anyway.

What is the purpose of the other little "cubical" canister up in the driver's-side dash area, kind of behind the oil pressure gauge. It seems to be piped into another overflow system that connects the tank, the filler neck, and the left side headlight bucket drain (???) Is that just another small charcoal canister?

Also, should the inlet into the air cleaner assembly be plugged, or just left open if the vent hose is removed?

Chris C.
70 911E

Chris,

I haven't noticed the other cubical canister that you mentioned in your last e-mail.

I agree totally about disconnection of the entire system...my hoses were all cracked and split. They probably didn't do anything at all...I doubt that the original did either.

I installed a small piece of hose running from the spot in the airbox that the evap hose connected to, to the hole in the bottom of the airbox. I would plug the hole with something maybe to prevent bugs/dirt from getting in there.

Bill

------------------
William Armentrout
1973 911T
2.7 carerra rs specs
www.geocities.com/william_armentrout

Bill -
I have a pair of fossilized old clear fuel lines running to a dark brown (?) cubical box, maybe 4" square, that is up behind the dash kindof near the hood shock on the drivers side. I will post a pic and maybe the schematic of the vapor recovery system tomorrow if possible. I am not sure if the 73 system is the same as 69-72 so you may have had a "simpler" system w/o this other box. Regardless, it seems just about as worthless as the main charcoal canister...except it looks like a real bear to remove w/o pulling out the blower assembly.

Chris C.

Chris,

I would like to take a look at the pic when you post it. I may have the item too, I just haven't noticed it. I have a K&N crankcase filter/clamp on order from Automotion. I'll let everyone know how it fits if anyone is interested.

Bill


------------------
William Armentrout
1973 911T
2.7 carerra rs specs
www.geocities.com/william_armentrout

Bill,
thanks for the description. Only thing I'm wondering...you don't have a CIS air box, do you? I think I may be able to do the same...I'd have to slowly read what you wrote while following the hoses in my car. Anyway, thanks!



------------------
Jeff
1976 911S

Here is the pic of the other "box" in my 70's evap system. For reference, it is kind of behind the driver's side hood shock, near the flasher relay. I have not yet scanned or studied the schematic of the vapor recovery system so I really have no clue what this box is for...

Jeff,

I don't have CIS. I'll try and post a pic of my crankcase filter when I get it. I'll try and post some pics as to what I did for the evap system too. I just have to borrow my friend's digital camera for these. As far as the pic of the unknown black box, I don't know what it is. I will look at my car today(if I remember), but I don't think I have one. Mine may have been removed by the previous owner...many things on my car are missing or non-functional. I kinda assumed that the expansion tank of the evap system was located in the front left fender, but maybe this is it? Or maybe this unit is used in conjunction with the expansion tank? I don't know. The Hayes manual that I have covers far too many years of 911 and does not contain enough detail on each model. I'll get back with you.

Bill

------------------
William Armentrout
1973 911T
2.7 carerra rs specs
www.geocities.com/william_armentrout

Bill -- nope this box is in addition to the metal canister down by the left battery box. I will trace its lines and see what they are connected to. Not the crankcase -- I think the main canister may be the crankcase recovery one and this one the tank and filler neck one?????