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Old 10-24-2015, 01:04 PM   #13
71CHEVYSHORTBED402
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Join Date: Feb 2009
Location: Northern Nevada
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Re: More vapor canister stuff - Cut one open and observations.

Quote:
Originally Posted by Gromit View Post
Quote:
"Is the L[]C version white? One of the filters I got is. It's more rigid than the fiberglass version."

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Yes, the replacement vapor canister filter that I bought from the truck catalog for about $10 was a white disc about 1/8" thick and 5" in diameter - and if I had to guess I'd say it was Dacron material or a composite rather than fiberglass.

Home Depot has many different types of HVAC filters readily available and the part I got from the truck catalog looked as if it could have come from a basically similar type of material - except the Home Depot filter is at least 2" x 2" and I could have cut 16 discs out of each one of those for about $0.37 each

I believe the California 1970 C10 vapor canister had only two connections - just the recirc and vacuum - (no PCV or drain yet)

So yes, with the 1970 version the bottom filter disc just slides / stuffs into the recess under the vapor canister - my old one was very oily from oil vapor coming in from the engine compartment (its a 45 year old truck that was used regularly)
The white one I got (729150 Standard) is more like 1/4-3/8". Sounds like the same material however. I believe you're right about the 1970 canister. I can only speak for my 71 canister, that it didn't have the funnel cap. Doesn't mean it never had one, but I suspect it didn't.
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Tony
71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assm. guide "kit" for restoring the truck from ground up. With assys, the guide accts for 1000s details, OEM identifications & part numbers, written in short order. 700+ images of assm., illust., charts, and points of interest. Much of the info. applies to all 67-72 GM trucks, and to a lessor degree all 67-72 GM vehicles. My build thread, and more on the guide https://67-72chevytrucks.com/vboard/...d.php?t=730025
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