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Old 11-12-2004, 06:17 PM   #1
OldSkool71
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Question Fuel Line Question???

Is the rubber line from the main tank to the metal lines 3/8" line? Im still trying to figure out what is wrong with my truck. And I know that one of those lines was cracking and leaked at one point. The reason I ask is because I haven't gotten back under it since I broke my wrist.. Now that the cast is off im ready to get back to work. Just wanted to know if that is the correct size so I can go buy some before I crawl under that baby.

thanks, Ron
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Old 11-12-2004, 06:45 PM   #2
1-PU70
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Its 3/8 or 5/16
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Old 11-12-2004, 09:38 PM   #3
Tx Firefighter
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6 cylinder or 307 got the 5/16.

350 or big block got the 3/8 line.
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Old 11-12-2004, 09:41 PM   #4
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My 81 has 3/8 up to the fuel pump, then changes to 5/16 to the carb.
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Old 11-12-2004, 09:48 PM   #5
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Quote:
Originally Posted by Blue Beard
My 81 has 3/8 up to the fuel pump, then changes to 5/16 to the carb.
I based my answer on two things,

1) he posted in the 67-72 section
2) his signature says 71 model truck
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Old 11-13-2004, 02:01 AM   #6
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thanks guys hope that is the problem
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Old 11-13-2004, 06:30 AM   #7
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Let me add a bit of advice. When connecting rubber hose to tubing without a bead on the tubing, it is difficult to get a good seal, especially with gasoline. You probably won't see the leak, it will be that slight. But if your truck sets for a few days, you will notice that you have to crank the engine for a little bit to get fuel to the carburetor.

To help with this, use Permatex Hylomar . This is a non-hardening sealant developed by Rolls Royce for use in carburetors and is the only gasoline resistant sealer that I am aware of. Wipe a little on the tube, install the hose and clamp. It works great.
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