Is the carbon canister in the engine compartment necessary?
 

I'm in the process of cleaning up my engine and compartment while the engine is out. The carbon canister is just flopping around in the compartment with no mount, and it looks like crap. Is this thing necessary? What is the danger of not putting it back in?

Most states require it for visual emissions testing.

it absorbs gas vapor and should be kept -- they last nearly forever

you should fix the bracket or straps and leave it there

search on "emissions" for more

if you do get rid of it - I'll take it.

it's hooked up to gas tank vent.

other lines tucked up under front left fender.

Summit + others has gas tank vent check valve units that shuts off gas flow in case of a roll over.

many pelicanheads have done this mod and posted pics and info somewhere in "search".

if you find the threads post them

I'm also interested in a different venting system. I recently put a 3.2 into my 73 and I have hoses with nowhere to go. Id like to clean thing up a bit.

So it sounds like I need to keep it. I'll fab up a mount to get it out of sight.

How do race cars get away without having this? I noticed at the track that many of the race cars don't have one, or it's hidden very well.

I removed mine. The vent line from the evap tank now vents at the front of the transmission.

Do you have any fuel odor problems? What is the downside to removing it?

i removed mine when i did my engine swap, i just vented the tank to the atmosphere, no probems with that except maybe not enviro freindly

downside = lots and lots of pollution EVEN when car is not running; gas odors in garage, and the worst is that garage will have benzene fumes in it - not good for anyone who wants to avoid cancer and esp. bad for kids and preg. women.

race cars have an exception under most US and state laws, as they are not allowed on the highway. (and there are few of them)

Who wants to send me theirs?

Rwebb.

I've got a Engine Compartment canister from my '82 SC parts car I'll sell you cheap, I think you had inquired about other parts from me too once upon a time.......PM sent to you.

No odor that I have detected.

I see from RWebb, I'm trying to kill myself slowly.

Threw mine out years ago and have never noticed the slightest fuel odor.

I also do not have one on my '69. I have yet to detect any fuel odor or anything. If one is needed to pass smog, I suppose that would not affect me, since my car is pre-'74.

I would like to get one for nothing more then the aesthetics appeal of it

keep it
 

As a fuel system engineer and porsche owner, I'd urge you to keep the emissions canister. Aside from the pollution / emissions aspect, removing the canister essentially opens your fuel tank to the atmosphere. The fuel tank normally "breathes" through the canister, both in and out as temperature changes, vapor generation occurs, and refueling. In some climates / conditions you may not notice a distinct fuel odor, but in most cases - especially during temperature changes, you'll be boiling off the light-ends (small hydrocarbon chains) from your fuel and losing volatility so some extent. You'll be gaining volatility in your garage though. In my case the odor was immediate upon disconnection of the canister. So from a safety, emissions, and fuel quality standpoint - keep it!
My $0.02...

Ok...im a little confused as to what cannister we are talking about keeping. I know there is some cannister in the front left fender that is connected to the gas tank.

There is another cannister in the engine bay that is mounted on the right side wall, just above, and to the front of the oil tank filler neck. This cannister basically filters the crank case vent. There is a hose that comes from the crank case, just to the left of the airbox, and goes to this cannister. After going thru the cannister, the return line goes to the airbox just above the originating crank case vent opening.

I too have wondered if I could just run a hose from the crank case vent to the airbox. this would greatly clean up about 6 or 7 feet of hose.

any thoughts on this cannister as opposed to the one that handles venting of the gas tank?

engine bay item = carbon canister; found in F trunk on LH side in early cars; moved to rear by at least '75

small squarish empty tank below cowl behind tach

and

empty tank in fender

are both also needed for fuel overflow and vapor control

I took mine out years ago and did not notice any difference in fuel odors. Removing the canister, bracket and about 12 feet of hose also cleaned up both the engine and trunk. No emissions test problems in NC since my car is over 35 years old and only has to pass a safety test.

I've got both front and rear for sale cheap if anyone is interested PM me. I take paypal........

Lots of other parts from my 1982SC getting parted out for sale too, just ask.....



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Hello Rusty Heap,

I am interested in the carbon canister you show next to the sawzall..... Do you still have this part?