Fuel Vapor Cannister

[bdub]

Lanier

While I was out at the junk yard yesterday, I noticed that these canisters
are on most of the GM cars and trucks of the same and a lil later time
frame. They'd probably nearly give it to you.

Good Luck

bdub

>SOS
>Need interchange info for 1973 GMC 455 fuel vapor cannister, GM part #
>7040590. Mine appears to be original and has gone south. NAPA shows one for a
>78 model 403, special order $75 - are they the same (parts book says not).
>TIA
>Lanier
>

 

[travis martin]

Lanier, I'd think it would be an easy substituion. I stumble through a lot
of wrecking yards; if you'll give me a description, I'll look for one. The
yards I frequent tend to have older stuff.

Tell me the size of the unit and how many ports it has on top and how they
are labeled...I'd be surprised if I can't spot one pretty quick.

Travis

- -----Original Message-----
From: HLBF
To: gmcmotorhome
Date: Saturday, April 24, 1999 6:01 AM
Subject: Re: GMC: Fuel Vapor Cannister

>In a message dated 4/23/99 9:16:41 AM Central Daylight Time,

>
>> He picked one up at the junkyard
>> that fit perfectly. I don't know what car but probably a Caddy or an
>Olds.
>>
>> I'm sure Walter will post the info after he reads this.
>>
>Well, I've called every junkyard in central Mississippi, even some I
>personally know to be over 50 years old, and haven't found a cannister from
a
>mid-70's to early 80's GM car. Some of the older yards reported clearing
out
>models that old to make room - can you believe that??? I really don't think
>they want to look for it, so I guess I'll just go wander around the larger
>ones (if they don't have one, how can they charge me for it if I find one,
>huh?)
>It would appear to me that any cannister from any model should do the same
>thing -Is there any reason it wouldn't??
>Lanier
>

 

[travis martin]

This sounds like the same can that GM's been using forever. Some of them had
a couple more ports and a vacumn operated valve made on top, but this oneis
the simple version.

They all do the same thing....there's a charcoal filter inside that absorbs
fuel vapors from the tank so that they aren't vented to the atmosphere, then
when the engine is running the vacumn from the manifold sucks those same
vapors from the filter and burns them.

I'll be happy to look for one while I'm piddling in wrecking yards, but I'd
be surprised if you can't find a dozen in the first fifteen minutes you go
to a local yard. My 90 model Chevrolet pickup has what sounds like the
identical can. I'd go look at my wife's 96 chevrolet but she's gone to visit
her sister today. I don't think you'll have any trouble finding one though.
All it has to do is mount the same.

Travis
- -----Original Message-----
From: Adohen
To: gmcmotorhome
Date: Saturday, April 24, 1999 7:30 AM
Subject: Re: GMC: Fuel Vapor Cannister

>In a message dated 4/24/99 7:59:26 AM Eastern Daylight Time, HLBF
>writes:
>
>> Tell me the size of the unit and how many ports it has on top and how
they
>> > are labeled...I'd be surprised if I can't spot one pretty quick.
>> >
>> Travis,
>> Best I cand remember (been a while since I looked) it's about 6" in
>diameter
>>
>> and 8" tall, 2 ports on top, one coming from fuel lines, one going to
>engine,
>>
>> located underneath motorhome just aft of co-pilot seat.
>
>Hi Guys and Gals!
>
>Just went out and measured my Cannister it is 5" round and 6" tall. It has
>two top ports, one says Tank and the other says Carb. It seems that the
>bottom has some type of media filter which I could feel. I did not remove
>the unit. The unit has Rochester Products marked on the top.
>
>Scott NEHODA'S
>BACK YARD
>

 

[walter m. drew]

Lanier,

I bought one in the junk yard. Came off an Olds station wagon circa
1974 with a 455. The owner of the junk yard referred to it as a "coffee
can" I paid $5 for it. It was just behind the front right headlight.
Removed one strut and had at it. 1/4" drive socket with extension would
be helpful. All I had was a crescent wrench and a pair of pliers.

I am looking for the vapor fuel separator by our rear left wheels. I
had gas pouring out of the area where my dual canisters are. Emery, the
wizard, diagnosis a faulty separator. Visited Emery yesterday and
other than some missent parts he is rolling along on the rear disc brake
conversion.

Walter 78 Royale

 

[hdavis]

- -snip->
>Scott that size sounds about right. Be aware though that the GMC through 77
>used one canister. The 78s used two. I don't know if they are the same.

California equiped GMCs of earlier years also had 2 canisters.

Henry

Henry Davis Consulting, Inc / new product consulting
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