Recent Topics
20W-50 for a hydraulic pump in a hydrostatic trans
by ford46guy
Today at 03:48 AM
new castrol edge high mileage synthetic
by hiflo
Today at 03:32 AM
Just an interesting question
by southernjeeper
Today at 01:52 AM
Value power Walmart battery acid flying out
by bbhero
Today at 12:44 AM
Leased 2013 Ford Suv With19,882 Miles Original Oil
by crazyoildude
Yesterday at 10:35 PM
Steak-House Burgers
by sleddriver
Yesterday at 09:53 PM
Got into an accident.
by bdcardinal
Yesterday at 09:42 PM
Its coming here more and more
by CourierDriver
Yesterday at 08:40 PM
Interpreting oil pressure vs engine RPM
by Emperors6
Yesterday at 08:39 PM
$4 Fram Ultra - Blain's F&F
by Poohbah
Yesterday at 08:21 PM
Toolbox - Pliers
by greasegunn
Yesterday at 08:09 PM
ProSelect Oil Filter????
by qwerty1234
Yesterday at 08:05 PM
Newest Members
jerryg, 1971tr350, Mak712, Lex4TDI4Life, cdub76
57988 Registered Users
Who's Online
32 registered (chriscpmtmp, Boomer, alcyon, BigD1, bourne, 4 invisible), 655 Guests and 333 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
57988 Members
66 Forums
249414 Topics
4082659 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: 414
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: 778
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 (gone to mopar heaven)
2009 hyundai santa fe
2004 mustang GT.

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


Registered: 02/01/11
Posts: 834
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: 37987
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 Online   content


Registered: 02/02/12
Posts: 6501
Loc: New England
Make sure whatever you use is gas-proof!
_________________________
1979 Coupe de Ville, 542 stroker, 15W-40 Super Tech, Delco
2011 Crown Vic P71, 5W-20 Valvoline NextGen, Purolator
2012 Suzuki AN400A, 10W-40 ST, Delco

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: 2010
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 - 52,000 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: 414
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