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Old 11-06-2020, 07:34 PM   #1
Harold Holbrook
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vapor lines

Does any one know were the vapor lines go from the back by the gas tank to the front on a 1971 chevy blazer 350 4 wheel drive.

Thanks
Jr.
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Old 11-06-2020, 08:20 PM   #2
PDXk5
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Re: vapor lines

Evening Harold,
This may help.

http://67-72chevytrucks.com/vboard/s...d.php?t=811325
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Old 11-06-2020, 08:47 PM   #3
SeventyOne
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Re: vapor lines

This should help

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If you dont have a factory assembly manual i highly recommend getting one.

After all that spaghetti mess back by the tank theres only 1 5/16" vapor hardline that runs to the engine bay (along with the fuel delivery hardline) that connects to the charcoal canister. Plus the brake line.

Last edited by SeventyOne; 11-07-2020 at 04:04 PM.
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Old 11-07-2020, 06:58 AM   #4
Harold Holbrook
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Re: vapor lines

I do have a factory assembly and I have the same picture . What I don't have is the lines going from the back to the front. 850. 00 dollars inline tube put a hole bunch of lines in a large box. (A real mess) The gas line I got the brake line I got. Their was another long line about the size of a brake line that goes from the front to the back with yellow caps on it don't know were that one would go. (May be they just but it in the box by mistake) The other 3 lines look like they get put together and run from the front to the back for the vent to charcoal canister.
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Old 11-07-2020, 04:01 PM   #5
SeventyOne
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Re: vapor lines

Quote:
Originally Posted by Harold Holbrook View Post
I do have a factory assembly and I have the same picture . What I don't have is the lines going from the back to the front. 850. 00 dollars inline tube put a hole bunch of lines in a large box. (A real mess) The gas line I got the brake line I got. Their was another long line about the size of a brake line that goes from the front to the back with yellow caps on it don't know were that one would go. (May be they just but it in the box by mistake) The other 3 lines look like they get put together and run from the front to the back for the vent to charcoal canister.
On the passenger frame rail you will have 3 hardlines:
3/8" Fuel line from tank to the fuel pump
1/4"(?) Brake hardline running to the rear axle
5/16" Vapor line

Here's some pics of my frame rails and the lines:
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You can see where the 5/16 vapor line ends in the engine compartment here:
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Old 11-07-2020, 04:07 PM   #6
SeventyOne
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Re: vapor lines

And a few more of the frame rail from tank to engine:

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If you need something else let me know.
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Old 11-07-2020, 04:35 PM   #7
Harold Holbrook
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Re: vapor lines

Thanks SeventyOne, That is just what I needed. They put an extra line in my box and I had no were to hook it up.
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