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 Post subject: Vapor recovery tank?
PostPosted: Mon Feb 24, 2014 2:54 am 
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starting to put my luv back together after sandblasting the frame and was curious if the vapor recovery tank is really needed. I have it i just wanted to know if i needed to reinstall it or just cap the lines. Thanks


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 Post subject: Re: Vapor recovery tank?
PostPosted: Mon Feb 24, 2014 9:48 am 
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Location: Camarillo, CA
The tank needs to vent someplace. With hot and cold the fuel will expand and contract, the vapors have to go some where,

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 Post subject: Re: Vapor recovery tank?
PostPosted: Mon Feb 24, 2014 10:47 am 
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Can we convert to a vented gas cap or reroute one line and put a check valve in it? Im also wanting to ditch mine beingbthat i dont have the stock motor and all thr misc crap that goes along with it

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 Post subject: Re: Vapor recovery tank?
PostPosted: Mon Feb 24, 2014 9:37 pm 
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A vented cap will work but you will smell vapors from it.

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 Post subject: Re: Vapor recovery tank?
PostPosted: Fri Feb 28, 2014 6:36 am 
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Smelling the vapors is ok with me. I think it will clean up the look of the bed...just my personal opinion.


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 Post subject: Re: Vapor recovery tank?
PostPosted: Fri Feb 28, 2014 9:39 am 
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Not that I know what I am doing... When I changed out my diff last year I had the bed off and had to disconnect the vapor tank. I researched it as much as possible and then capped off everything but the gas line to the fuel pump. I wasn't sure but decided to go for it. I haven't had any issues so far. As far as a vented gas cap, mine has an old locking cap and I figured the seal was so old if it needed venting it was good to go.

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 Post subject: Re: Vapor recovery tank?
PostPosted: Fri Feb 28, 2014 10:52 am 
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My v8 blazer was capped when I got it. On a morning when it was cool then warmed considerably, the tank was pretty full and the pressure in the tank pushed fuel through the carb. Fuel was running out the valve covers. I drilled a hole in the cap...

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 Post subject: Re: Vapor recovery tank?
PostPosted: Fri Feb 28, 2014 12:29 pm 
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mytmouz wrote:
My v8 blazer was capped when I got it. On a morning when it was cool then warmed considerably, the tank was pretty full and the pressure in the tank pushed fuel through the carb. Fuel was running out the valve covers. I drilled a hole in the cap...


8O


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 Post subject: Re: Vapor recovery tank?
PostPosted: Fri Feb 28, 2014 12:32 pm 
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LUVTRKR hit the nail on the head, most of these old caps are worn out enough to vent. My friends shop that does smog sees most of the 70's cars and trucks failing smog checks due to caps not sealing.

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 Post subject: Re: Vapor recovery tank?
PostPosted: Sat Jun 13, 2015 4:46 am 
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Buy a new cap. Spend the five bucks. I did. My fuel economy jumped 1 and 1/2 mpg. It's supposed to be a closed system with the vapors returning back to the tank at the back or into the engine at the front.


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