Fuel System Restoration: Filler Neck

[edjrbashian]

I am going through my fuel system(replacing lines, new fuel tank) and was wondering what others have done for the fuel filler neck.

Mine has some rust in the entry point. I would like to treat it before installing as I don't want more paint to chip away into the fresh fuel system. Anyone else been through this?

Option I can think of:

1. Purchase new filler neck (cant seem to find 911 201 049 02) new anymore
2. Wire brush areas and rust treat with evap o rust or similar
3. Powder-coat the filler neck (not sure how this will fare long term to gas exposure)

[Shaun @ Tru6]

Have it Cerakoted with E-100 Blackout. They will media blast the entire thing inside and out and give two medium wet coats. It will look great and last forever.

[edjrbashian]

Thanks Shaun that is helpful I’ll look into that.

Now for the fun part removing the filler neck

[Funracer]

There is a filler neck for sale in the parts classified listed earlier today. It’s for an earlier car but perhaps you can adapt it to your car??

Good luck

[Magyar Kiwi]

Hi
Clean it up and get it zinc plated, inside and out.
(This will stop it from rusting again.)
Then paint it as per original.
(Looking at your photo it seems to have been painted inside; over time the refueling nozzle has removed some of this paint.)
Cheers

[nickelplated5s]

Cerrakote. Per my hydraulic shop zinc will flake. My above ground fuel tanks have black iron fittings per their same advice.

[Funracer]

Cerakote is the way to go. Amazing stuff.

[mepstein]

Originally Posted by nickelplated5s

Cerrakote. Per my hydraulic shop zinc will flake. My above ground fuel tanks have black iron fittings per their same advice.

That’s a new one to me. Lots of fuel parts and fittings are plated.

[PeteKz]

I can't say that I've had a problem with zinc plating flaking.

[edjrbashian]

Thanks for the responses everyone, any advantage of zinc plating the filler neck if I have to paint it black anyways?


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[Shaun @ Tru6]

There is no advantage to plating the filler if you are painting it Ed. If anything, if you are using Cerakote, a slight disadvantage as you would soften the media blasted etched surface which would reduce Cerakote adhesion.

[edjrbashian]

Thanks Shaun,

Have you seen these cerakoted before? Since it’s a spray application, how do they spray inside the tube ?

Would Powdercoating be easier to do with that in mind?


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[Shaun @ Tru6]

Ed, I do them all the time. I use high pressure and narrow spray pattern and check with a mirror to confirm coverage. Started doing that with 928 S4 intakes and it works well.

[nickelplated5s]

Zinc is a plating. By definition it can flake.

Thought about this last night and all the oil threads. Perhaps a little zinc small enough to get through a filter wouldn't be bad

[Shaun @ Tru6]

i don't do zinc but have done over 150K pieces of 911 hardware in cadmium over the last 9 years. Electroplated metals can flake but only due to poor surface prep and/or improper process/process parameters. It's not a real consideration when using a quality shop.