Recent Topics
WHOA Recent Topics!!
by Brybo86
21 minutes 47 seconds ago
Newer diesel oils in older gas vehicle
by Samrsnow
37 minutes 20 seconds ago
Pennzoil Fallout?
by FlyingTexan
45 minutes 38 seconds ago
ATF for my hybrid?
by Dyusik
Today at 10:05 PM
1988 Chevy Scottsdale oil filter
by NavyVet88
Today at 09:58 PM
Grandmother just picked one of these up....
by gregk24
Today at 09:57 PM
Disposal and collection solution
by Mikemac
Today at 08:34 PM
Subaru - best AWD technology?
by NissanMaxima
Today at 08:34 PM
Why do store-brand / exclusive tires exist?
by 92saturnsl2
Today at 08:28 PM
Mobil Super Syn 0w20 - 9,829 miles - CX5 w/ 2.5l
by RamFan
Today at 08:17 PM
2006 Accord XM antenna cover
by greenjp
Today at 08:06 PM
Car dies when I push in the clutch
by Fsharp
Today at 07:54 PM
Request Input: UOA Quick Start Guide
by M54B30
Today at 07:49 PM
2011 LML Duramax 91,000 miles, 8500 OCI Delo 15w40
by Too3zln
Today at 07:26 PM
Help with a threaded adapter.
by OneEyeJack
Today at 07:08 PM
What else needs to be done...
by OneEyeJack
Today at 07:02 PM
1100 miles, Factory Fill 2016 Harley Electra Glide
by montero1
Today at 06:52 PM
Vehicle Lighting Fads?
by SubLGT
Today at 06:25 PM
WIX 57060, CUT OPEN
by car51
Today at 06:10 PM
Carquest Premium Air Filters = Wix?
by mclasser
Today at 04:52 PM
Newest Members
Geoff1200, ggw1957, WSinla, jujufly, phrancke
60622 Registered Users
Who's Online
46 registered (carlprop, bbhero, Brybo86, clinebarger, ammolab, Blkstanger, 4 invisible), 1326 Guests and 12 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
60622 Members
66 Forums
261485 Topics
4313685 Posts

Max Online: 3590 @ 01/24/17 08:07 PM
Donate to BITOG
Topic Options
#2935435 - 03/11/13 03:19 PM grease gas cap seal?
Digital2k2 Offline


Registered: 01/12/04
Posts: 432
Loc: va
My gas cap isn't sealing completely. I had a locking one on there and took it off because I figured the seal went bad on it. Put the original back on and I can still smell fumes a bit. I tried cleaning the filler neck where the seal contacts and the seal of the cap but it didn't take care of it.
This cap was only used for around 3k miles and is just a few years old with what looks like a silicone seal on it (orange) instead of the regular black seal that the locking one has.

My next thought is to try putting a thin layer of dielectric grease on the silicone seal. Is this a bad idea? The only downside I can think of is that it may catch more dirt and need to be cleaned more frequently. Worth a shot?

Top
#2935438 - 03/11/13 03:23 PM Re: grease gas cap seal? [Re: Digital2k2]
hemitom Offline


Registered: 03/12/07
Posts: 834
Loc: canada
If its already not sealing i think you have nothing to lose, it may soften the gasket enough to work again.
_________________________
2006 kia spectra
2009 hyundai santa fe
2012 mustang coupe.

Top
#2935458 - 03/11/13 03:40 PM Re: grease gas cap seal? [Re: Digital2k2]
AandPDan Offline


Registered: 02/01/11
Posts: 864
Loc: MA
Are you sure it is the cap leaking?

Sometimes the filler necks rust out.

Top
#2935463 - 03/11/13 03:41 PM Re: grease gas cap seal? [Re: Digital2k2]
JHZR2 Offline



Registered: 12/14/02
Posts: 39341
Loc: New Jersey
MB sells gaskets for their caps. After 30 years sometimes it is needed.

Perhaps the size is the same on all filler necks?

Cut your own gasket from sheet rubber?

Top
#2935469 - 03/11/13 03:47 PM Re: grease gas cap seal? [Re: Digital2k2]
Jarlaxle Offline


Registered: 02/02/12
Posts: 7453
Loc: New England
Make sure whatever you use is gas-proof!
_________________________
1979 Coupe de Ville, 542 stroker, parked for winter frown
2011 Crown Vic P71, 5W-20 NextGen, Motorcraft
2012 Suzuki AN400A, parked for winter frown

Top
#2935474 - 03/11/13 03:49 PM Re: grease gas cap seal? [Re: Digital2k2]
mechanicx Offline


Registered: 10/23/09
Posts: 8576
Loc: Ohio
I would just replace the cap or the seal. Silicone based seals are the one seal type you shouldn't use silicone grease on, unless maybe you are trying to soften the seal.

Top
#2935567 - 03/11/13 05:19 PM Re: grease gas cap seal? [Re: Digital2k2]
Tegger Offline


Registered: 03/20/06
Posts: 2199
Loc: Canada
Originally Posted By: Digital2k2
My gas cap isn't sealing completely. I had a locking one on there and took it off because I figured the seal went bad on it. Put the original back on and I can still smell fumes a bit.

What year, make, model?
_________________________
2013 Toyota RAV4 - 67,000 miles - Toyota 0W-20, Toyota filter

Top
#2939244 - 03/15/13 01:13 AM Re: grease gas cap seal? [Re: Digital2k2]
Digital2k2 Offline


Registered: 01/12/04
Posts: 432
Loc: va
Just seems like if it was a bad seal that the barely used original cap wouldn't do it too. I tried a thin coat of dielectric grease on the seal and it didn't make a difference.

The vehicle is an 09 nissan frontier.

Top