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Home » Public Forums » GMCnet » Charcoal canister filter maintenance write up/reminder
Charcoal canister filter maintenance write up/reminder [message #278017] Mon, 18 May 2015 21:15 Go to previous message
Tilerpep is currently offline  Tilerpep   United States
Messages: 404
Registered: June 2013
Location: Raleigh, NC
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Senior Member
Still had some gas odors. Got a new gas cap. And it proved that pressure was building in the tank with a good blow when I took it off.

I had checked the fuel vapor separator (above driver rear tires) when I first got the coach, it checked ok and other things took precedence.

After new cap, decided to check lines to the front. The vent line blew clear to the gas filler neck, good.

Nothing through the line forward from fuel vapor separator. Unhooked it from hard line at driver front tire. Blew rubber line out, full of water (not gas). On to the hard line that crosses behind engine. Nothing passing. Unhooked canister side, used a coat hanger and compressed air and got it free flowing. Getting the canister out of the mounting bracket was a bear - the canister was so grimed in it was royally stuck. You can't remove the bracket unless the canister is out. Hours of tedium to not break anything and all was disassembled.

I think this filter from the bottom was way past service life! Maybe original, who knows.

http://www.gmcmhphotos.com/photos/data/15/thumbs/DSCN6341.JPG

If you haven't checked your system, move some air through the lines and visually inspect the filter underneath. You can see it without removing anything, but to change it, you have to get the canister out of the holder. I didn't use a Fram BA357 filter, but Oreillys cross listed it for less than $3.


1975 Glenbrook, 1978 Royale rear bath Raleigh, NC
 
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