Recent Topics
Anyone using Hornady Custom?
by Hokiefyd
10/30/14 05:58 PM
Will Liqui-Moly MoS2 void warranty?
by lawman1909
10/30/14 05:54 PM
High Energy Laser
by Papa Bear
10/30/14 05:31 PM
How many beers for oil change??
by Tuffy1760
10/30/14 04:51 PM
Moving on from Castrol 0w-30 shortly in the Golf.
by sparky123
10/30/14 04:17 PM
Flag etiquette
by gathermewool
10/30/14 04:16 PM
2011 equinox P0011 code fixed.
by hardcore302
10/30/14 04:06 PM
Kmart PP 5 qt. Jug $22.54 Individual qt's $4.64
by tenderloin
10/30/14 03:28 PM
Combining wax into one.
by Malo83
10/30/14 02:46 PM
Small Ball
by HosteenJorje
10/30/14 02:09 PM
PP 5w-20 Accord 2.4 5581mi
by k24a4
10/30/14 01:56 PM
Notice in Toyota owners manual
by edwardh1
10/30/14 01:07 PM
Newest Members
FiveOhTorx, conefree, NEVALEAK, kevmor99, macbaxter
51742 Registered Users
Who's Online
102 registered (147_Grain, 72te27, 943kgt, AandPDan, 95MarkVIII, 86cutlass307, 7 invisible), 1566 Guests and 150 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
51742 Members
64 Forums
221419 Topics
3501606 Posts

Max Online: 2862 @ 07/07/14 03:10 PM
Donate to BITOG

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


Registered: 01/12/04
Posts: 367
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: 744
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 Online   content


Registered: 02/01/11
Posts: 641
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: 33791
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: 4151
Loc: New England
Make sure whatever you use is gas-proof!
_________________________
1979 Coupe de Ville, 542 stroker, Super Tech 15W40, AC Delco
1995 Dakota, 5.2, VWB 5W-30, NAPA
2012 Suzuki AN400A, M1 10W-40, Caltric

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: 1445
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 - 21,000 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: 367
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