Thread: AN fittings

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I put AN fittings and braided hose for my gas lines. My line to the fuel pump came loose. Should I have put Loctite on the threads...

Short answer NO.

Longer answer, check into "the why" it came loose. Many routing things could cause this, like a hose too short, hose twisted causing a torque pressure to the fitting.

I had a similar problem with a NOS fitting that was hitting the firewall when the engine torqued over at launch.

Originally Posted by John Palmer

Short answer NO.

Longer answer, check into "the why" it came loose. Many routing things could cause this, like a hose too short, hose twisted causing a torque pressure to the fitting.

I had a similar problem with a NOS fitting that was hitting the firewall when the engine torqued over at launch.

Thanks, I didn't think I should use anything on the threads, the intake for the fuel pump is a straight thread to 10 AN, got reducer 10 to 8 AN, to a 90* 8 AN braided hose pointed up. The 90* came loose, I'll see if there's any torque pressure to the fitting.

Thanks again.. John

Thanks for this post! Im running new braided lines/AN fittings on my Nova for the first
time. Going to double check I dont have this problem.

If you dig deep enoungh there are some nylon washers that you can use on the seal. I think these are more for sealing a slightly worn seal surfaces. Summit I think has them.

I'd be surprised if the fuel pump is a straight thread - any that I've seen, mechanical or electric, regardless of the brand are pipe. If they are pipe, then you can use Teflon tape. If it's an adapter fitting to the pump, pipe to -AN then all bets are off as you should not use Teflon tape (but, then I have and for that very reason of coming loose)

Originally Posted by IC2

I'd be surprised if the fuel pump is a straight thread - any that I've seen, mechanical or electric, regardless of the brand are pipe. If they are pipe, then you can use Teflon tape. If it's an adapter fitting to the pump, pipe to -AN then all bets are off as you should not use Teflon tape (but, then I have and for that very reason of coming loose)

Well the inlet is a straight thread with a copper washer, I tried different size pipe thread adapters, it's not a pipe thread...........

I would avoid the nylon seal washers. AN fittings are crush-fit. If it don't seal, replace it.