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Old 05-13-2010, 09:24 PM   #1
velleguy73
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Default Fuel Filler tube metal top, how to clean

Howdy folks,

My car threw a P0442 code 5 miles into a 250 mile trip today. It ran OK so I just went for it and made it home. Turns out, thanks to the forum, that usually means a worn rubber seal on in gascap. Thankfully, I had an extra filler tube and gascap from a previous saturn project car just laying around.

So far so good with the other gascap installed. The issue is I can see tons of corrosion on the metal ring/seal on the end of the filler tube. It is definatly effecting the seal. The ring looks like it can come off pretty easy. Considering this can't be painted and must be metal to ground the car when you fill-up at the pump, I am not sure how to clean it up. Sanblasting would just make it more succeptable to corrosion.

Has anyone ever tried to clean this? Thoughts? Ideas?

Thanks for the help.

Cheers!

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Old 05-14-2010, 06:56 AM   #2
MiSaturn
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Default Re: Fuel Filler tube metal top, how to clean

Assume you've tried to remove whatever is there with a cleaner (contact cleaner/Gumout)? I've noticed what looks like corrosion on my filler and found that alot of it was built up gunk that I could clean off.

If it's true rust - perhaps a rust converter would help stop it and make a smoother mating surface.

My guess is that the gasket on the cap is more than enough to compensate for any irregular surface on the filler pipe surface.

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Old 05-14-2010, 07:13 AM   #3
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Default Re: Fuel Filler tube metal top, how to clean

Scotch brite and keep the crud out of the gas tank.

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Old 05-14-2010, 07:58 AM   #4
velleguy73
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Default Re: Fuel Filler tube metal top, how to clean

Quote:
Originally Posted by OldNuc View Post
Scotch brite and keep the crud out of the gas tank.
Cool, I'll give a whirl. There's 1 screw and a bunch of spring tabs holding it in. Definatly an off the car project.

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Old 05-14-2010, 10:02 AM   #5
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Default Re: Fuel Filler tube metal top, how to clean

Don't try and take it apart. There is a raised seat that the gasket in the cap mates with. That is what needs to be cleaned off. Fold up a paper towel so you catch the shavings and they do not end up in the tank. Just take a scotch brite to the seal area. Takes all of 5 minutes and most of the timer is spent folding the towel and carefully removing it. Don't put the towel into the hole with the flapper as you will not get it back.

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Old 05-14-2010, 11:00 AM   #6
saturnsctwo
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Default Re: Fuel Filler tube metal top, how to clean

i just sanded mine a little with fine sandpaper & then used a little silicone grease on the metal to prevent more corrosion....

mine was a little corroded around the sides mostly on the bottom, not the sealing area...

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Old 05-14-2010, 11:53 AM   #7
sl2eggplant
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Default Re: Fuel Filler tube metal top, how to clean

I put a damp napkin and covered the filler hole. Wet napkins tend to stick to small bits of dust better than dry ones. When I finished sanding, I wiped down the surface with the wet napkin and sucked out whatever was left with a shop vac.

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