Recent Topics
'00 Firebird oil change update.
by EricF
04/23/14 02:35 PM
Where to buy LE1605 in quarts?
by dedonderosa
04/23/14 02:05 PM
Flushing out previous "Stopleak" ?
by GoStumpy
04/23/14 01:29 PM
Free Oil changes at my Nissan dealer but no ester?
by racin4ds
04/23/14 12:44 PM
Redline D6 for '07 BMW 328xi
by typ901
04/23/14 12:38 PM
Shift Solenoid Pack on Dodge 41TE/A604
by Thermo1223
04/23/14 11:56 AM
1996 Civic Power Steering Fluid & Filter
by 01_celica_gt
04/23/14 11:50 AM
concoction to free up rusty transmission gears.
by Panzerman
04/23/14 11:30 AM
Brake Job 2000 RWD Chevy Astro
by actionstan
04/23/14 11:06 AM
A new car, from Boeing!
by expat
04/23/14 11:04 AM
PayPal fees
by Thermo1223
04/23/14 10:05 AM
5w30 vs SAE 30. Does SAE 30 have better chemistry?
by 2000Trooper
04/23/14 10:00 AM
Newest Members
and111, guzie, myrtlebeachrick, NTech, ImZIC
49675 Registered Users
Who's Online
77 registered (actionstan, 440Magnum, and111, 06AllAmerican, b1amgm47, 5 invisible), 2038 Guests and 189 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
49675 Members
64 Forums
212323 Topics
3328350 Posts

Max Online: 2651 @ 04/21/14 04:38 PM
Donate to BITOG

Topic Options
#2935435 - 03/11/13 03:19 PM grease gas cap seal?
Digital2k2 Offline


Registered: 01/12/04
Posts: 344
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: 713
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
2006 chrysler 300

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


Registered: 02/01/11
Posts: 556
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: 32575
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: 3453
Loc: New England
Make sure whatever you use is gas-proof!
_________________________
1979 Coupe de Ville, 542 stroker, Super Tech 15W40, Delco
1995 Dakota, 5.2, Shell 5W-30, Proline
2012 Suzuki AN400A, unknown

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: 1312
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?
_________________________
1991 Acura Integra - 414,467 miles - Mobil 1 5W-30, Honda OEM filter - **SOLD**
2013 Toyota RAV4 - 9,000 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: 344
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