I have researched on this forum for a couple of days trying to figure out if the 914-6 came with an expansion tank and charcoal canister, I do not have either on my '70 # 2604. My 6 has the brackets for the expansion tank so that seems logical but I have seen a lot of posts saying the 6's did not have a canister, does anyone have an original 6 that could comment on this. Thanks!

No canister on a '70 /6 ...

So no canister then does the expansion hose just route out through the bottom of the car?

I say wrong, Mine has a metal expansion tank and the metal charcoal canister. .
It's shown in the factory parts manual for 914-6 section 2-1 item 15 and 31. . same part number used on the early 4 cylinder as the 6. .

I know of several unmolested '70 /6 that never had the charcoal canister ...

Mike..
Yes the hose from the expansion tank vents/goes to the over flow hose and attaches via a plastic adapter. 1970 914-6 expansion tank no charcoal canister
1..side view
2..top view
John

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I’ve seen 70 -6’s with and without vapor recovery/charcoal cans. My didn’t have one and was also missing the two holes in the inner fender for the lines leading back to the engine compartment. Based on that and seeing many original cars I believe that is the deciding factor. I can post pictures showing original 1970 -6’s with and without if you’d like

My '71 had both and will have both again when reassembled. Sorry about the pictures size. I am a photo-sizing idiot. I just can't figure out how to reduce the size of the pictures.....why does Apple have to make it so hard? Or in the alternative, why is it that I am so stupid when it comes to this stuff?

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My six was built in January 1970 and hs both.

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I've seen early 6's without and later with. One of the early ones was an origional owner who didn't change anything - ever- on his car. So I think it is one of those rolling changes from Porsche.

Mine is #379. Don't got neither. Original as far as I know. Hose looks original and routed out the bottom.

My early '70 does not seem to have ever had the charcoal canister.

My Euro 6 had neither. The brackets for the expansion tank are present though the paint condition would indicate that no tank was ever installed.

Good point, I will check the brackets on mine to see if there are any mounting wear marks.

Same here (other than the VIN, obviously). I've owned two. One very original and the other not quite. Both 1970 and neither had the charcoal cannister. Just the overflow drain out the bottom. As others have noted - it seems to be one of those inconsistent things. Not an early-late or California-rest of country item.

- MR

I cannot say for sure one way or another but I can give you examples of canisters installed on later 1970 914/6. I cannot tell you if they were installed by the factory.
I think looking at the overflow down tube and looking for the holes for hoses to the back will give you and idea about what was there.

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914 043 2567
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All the un-touched 6's I've seen have had charcoal vapor cans

Doing a little research and thinking about the system the answer is simple, if you have the hoses that go back to the air cleaner in the engine compartment it was probably installed
An installation requires holes in the front trunk and under the relay board in the engine compartment.
Here is an illustration from the shop manuals, air is circulated from the fan to the canister then it pushes fumes to the air cleaner on the engine. I know this is a diagram of a 4 cylinder car but the concept is the same for a six.

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It is not an east coast / west coast thing ?
Are there two versions of early compliance stickers ?

here is a picture of one of my sixes, it has the holes for the hoses.
It was delivered in LA CA so perhaps it is a CA thing?

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A little late to the party, but my 70/ 6 (1088) did not have a charcoal canister as delivered. It was US spec, but delivered in April 1970 in Europe. Maybe it was a California thing

Well I have the 2 holes and they still have the rubber grommets in them so definitely the canister was installed at one time. Mine was also an LA delivered car.

Since the recovery system is an EPA requirement, whatever the smog / emissions requirement for 1970 would have dictated which vehicle had the tank, filter system. .
I know Calif required them, but what about other states? I do know the
emissions sticker on the fan shroud states the motors comply with New York requirements, anyway mine does.

Well, related from a 914/6 question would be.. did the 911's have them as well for 1970? Did they have them as early as 1969? If so, then then the whole Porsche lineup would have had them for 1970.

However, if this was a reaction to the US passing the Clean Air Act in 1970, then it would make sense it could have been a midyear improvement, and conceivable a dealer "retro- active" installed requirement for later cars that sat on the lot? Just a thought.

I also imagine it was quite popular back then to remove "emissions" related things.. in the name of better performance and finding cars that haven't been "molested" for 47 years isn't easy...

Only 1 hole in that area, for the radio antenna.

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Correct me if I am wrong, but did the euro spec sixes not have the canister and chamber?

Mark, is there a bracket on the fuel tank for the canister on your car?

Lets try this by VIN
My 1095 car has vapor tank and charcoal canister ( but no extra holes or plumbing to rear) Rochester NY delivery
My car 2567 has tank, canister and plumbing to rear. Pasadena Ca. delivery.

Yes. I never thought about it before. That whole area looks untouched.
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Wish I could go out in the garage and look at my '71 6, but I foolishly sold it many years ago... almost 100% sure it had the overflow and cannister though.

My car, #619 never had the canister.. The bracket is
on the gas tank, but the only hole in the fender is for
the antenna.

Great replies guys. Unfortunately when I disassembled my car, I thought it was going to be a quick resto and didn't bother documenting the process. Had I done so I would have pics to support my questions. I kept the parts together as I took the car apart, and the gas tank/filler and expansion tank stayed connected. Didn't occur to me that the attach point on the gas tank for the charcoal canister...didn't necessarily mean that a canister was ever attached. Further confusing was the fact that I have a couple charcoal canisters up on a shelf with 911 parts, but no attachment bracket.

I just helped my son run new plastic and cloth lines on his 72 1.7 from the charcoal canister to the engine compartment, and assumed that I was going to have to do the same...but upon investigation, realized that I am missing the holes in the driver's inner fender. I'm thinking that the gas tanks were the same (with the canister fittings) for both the with and without scenarios...but the inner fenders were different. I see from PET that there were two different expansion tanks, and they look to be "plumbed" differently. I have the one with the notch for the filler neck that has the two small 3mm barbs for the cloth lines. I'll look at the schematics in PET and see what goes where. One question I have is for the 3mm line coming out of the expansion tank, heading to where the canister would have been positioned. Lacking a canister, where does this connect? To the small barb on the plastic Y connected to the larger clear overflow tube that exits out the bottom of the car?

And this begs another question before I install the gas tank...for the antenna wire that does come through the driver's inner fender, where does it go through the dash? I thought I had used up all of my holes in the dash, but that antenna wire needs to find the back of the radio somehow?

think you might be on the money.
govt. laws kicked in for calendar year?
cars are on model year spanning calendar mid years.
might have kicked in with US cars after end of dec 69?

fair point too as to what constitutes an unmolested car.

as an aside, we've been delving into the can/hose layout in 74 1.8s in originality forum.
have worked out somewhere along the line the plumbing to the cans got changed, at least in the 4 cylinder cars. not just to with running hoses to can in front or shorter hoses to can in engine bay, but changed which hose went into which end of can. porsche definitely had a policy of how to plumb this system to the fan (in early 70s 911s) that was the opposite of how VW plumbed their cars (bugs, buses, 411s etc). the vo-po is interesting territory........ as its neither or both?

March '70 -6. Non-CA car as best I can determine. Never had the charcoal canister; no mounting brackets/hoses/holes. Not even a radio antenna hole-on mine it is on the passenger side cowl so the cable comes down right by the washer tank.

@fixer34

must be a CA thing then?
but even then it might have been CA only for 70 cal. year.
CA has some special privileges doesn't it in relation to smog laws. they can introduce air pollution laws earlier than other states. recalled reading about it last year when former pres. trump proposed taking away the right and bringing CA into line with other states for uniform introduction of new laws.

its a pretty expensive set up for the can on the early cars (as well as 911s) as its two long runs of large diameter hose. VW were more penny pinching with their approach during the same era. only a long line of fuel vapor hose (small diam) to rear of cars and shorter lengths of woven hose from rear cans to fan and aircleaner. you can see why they changed it in 74 to a rear can. the accountants would have been doing the numbers looking for a dollar here and a dollar there. for the same reason they would have wanted to delete it from as many cars as they could early on in production.

the cars (4 or 6) that made it here in the 70s (all european spec) don't have any of it.
expansion tank or can. i think aus brought in the cans in 1975 following USA standards.
generally aus copied the usa about 5 years behind on just about all emissions stuff.

My '71 914-6 was a CA delivery.