charcoal box?
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Mountain Pass
Joined: Apr 2001
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charcoal box?
I'm thinking of replacing the breather on my 71 F100 (302 cid / C4 trans). There are two hoses going to the PCV filter inside the breather... one goes to the valve cover and the other goes to a box on the frame rail.
The one going to the valve cover is the PCV 'intake' and should be replaced with a valve cover breather but I don't what that box is or what I should do with the hose going to it.
It has another small line going to it that come from toward the back of the truck... about the size of a fuel or transmission line.
I think I've heard similar looking boxes called charcoal boxes but I'm not sure what it's for or more importantly what to do with the hose that goes to the breather.
Anyone know?
Thanks,
Tom
The one going to the valve cover is the PCV 'intake' and should be replaced with a valve cover breather but I don't what that box is or what I should do with the hose going to it.
It has another small line going to it that come from toward the back of the truck... about the size of a fuel or transmission line.
I think I've heard similar looking boxes called charcoal boxes but I'm not sure what it's for or more importantly what to do with the hose that goes to the breather.
Anyone know?
Thanks,
Tom
Posting Guru
Joined: Apr 2002
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From: Greenwood In. USA
charcoal box?
Thats is your Evaporative Canister. I captures all of the fuell vapors from your Gas tank and your carb fuel bowl and stores them for burning later. You should leave it on and make sure all of the lines are ok.
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Mountain Pass
Joined: Apr 2001
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charcoal box?
Originally posted by gasman6674
Thats is your Evaporative Canister. I captures all of the fuell vapors from your Gas tank and your carb fuel bowl and stores them for burning later. You should leave it on and make sure all of the lines are ok.
Thats is your Evaporative Canister. I captures all of the fuell vapors from your Gas tank and your carb fuel bowl and stores them for burning later. You should leave it on and make sure all of the lines are ok.
Posting Guru
Joined: Apr 2002
Posts: 1,471
Likes: 3
From: Greenwood In. USA
charcoal box?
Do you have a vac hose diagram on the radiator core support or the hood? It will tell you what line is what. My guess is the 1/2" line is a fresh air inlet for the canister especially if its filtered but my knowledge pre-79 is limited.
Hope this helps
Hope this helps
Thread Starter
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Mountain Pass
Joined: Apr 2001
Posts: 198
Likes: 0
charcoal box?
Originally posted by gasman6674
Do you have a vac hose diagram on the radiator core support or the hood? It will tell you what line is what. My guess is the 1/2" line is a fresh air inlet for the canister especially if its filtered but my knowledge pre-79 is limited.
Hope this helps
Do you have a vac hose diagram on the radiator core support or the hood? It will tell you what line is what. My guess is the 1/2" line is a fresh air inlet for the canister especially if its filtered but my knowledge pre-79 is limited.
Hope this helps
Rigging up a valve cover breather or something similar down at the canister might pick up water so I'm thinking about abandoning the whole idea and just trying to restore the factory breather.
