AN Fittings

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custodian

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I've never used AN fittings before. I bought a kit to use for my trans lines on the LS Swap. After getting everything put together, I found the the fitting part just above where the hose connects is loose. It's not lose where the two pieces mate together, it's loose at the pipe piece just above. I can move it back and forth on the tube. Is this normal or do I have a complete set of crappy fittings, or did I assemble them wrong?
 
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nvrenuf

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Pics?
 

custodian

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This is the type of fitting I have. The part that is lose is the tube coming out of the fitting under the word "AUTO". The pipe will move slightly in and out.
 

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Joshua Keith

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I've never used AN fittings before. I bought a kit to use for my trans lines on the LS Swap. After getting everything put together, I found the the fitting part just above where the hose connects is loose. It's not lose where the two pieces mate together, it's loose at the pipe piece just above. I can move it back and forth on the tube. Is this normal or do I have a complete set of crappy fittings, or did I assemble them wrong?
I just installed AN fittings from my fuel pump to the carb and I do have some wiggle in the fitting below the tractor in your pic. But the fitting connected directly to the rubber line should be tight.
 

custodian

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Catawba
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William
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1973, 1985
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C10
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5.3 LS, 350
I just installed AN fittings from my fuel pump to the carb and I do have some wiggle in the fitting below the tractor in your pic. But the fitting connected directly to the rubber line should be tight.
No wiggle on the bottom connector, just some in and out movement on the other connector. The rubber braided hose connection is tight, no movement.
 

nvrenuf

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I wouldn’t think the tube should be loose. The nut under “meet” should pinch the hose to the tubing nipple.

I’ve use similar (but not AN) fittings on air hose and any twisting action on the fitting causes the hose to kink or wrinkle, definitely not loose.

Are you sure the hose was bottomed out inside the nut?
 

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