Recent Topics
Possible sludged VQ37HR
by aualtima3.5
2 minutes 37 seconds ago
"Gravel Traps"
by simplistic
20 minutes 41 seconds ago
Transmission clunk, I cannot figure it out!
by Klutch9
47 minutes 33 seconds ago
The 15,000 Mile OCI
by macarose
Today at 09:40 PM
Coolant and head gasket question
by Patrick0525
Today at 09:12 PM
Bleeding brakes
by wallyuwl
Today at 09:05 PM
Poles #EatApples to annoy Putin
by dave1251
Today at 08:57 PM
Is it a competition?
by telecat
Today at 08:35 PM
What oil to use in my Saturn
by ram_man
Today at 08:32 PM
Air Travel from US to Ebola Outbreak zone
by Clubber_Lang
Today at 08:22 PM
New 5.0 what oil
by Camprunner
Today at 07:49 PM
Fred's Dollar Store Oil Special
by Red91
Today at 07:44 PM
Newest Members
jdfay, kaesees, bprat318, Winter_Texan, SloopJohnB
50816 Registered Users
Who's Online
97 registered (6starprez, asand1, 123Saab, aquariuscsm, 13Tacoma, 10 invisible), 1501 Guests and 209 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
50816 Members
64 Forums
217134 Topics
3419008 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: 362
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: 736
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: 605
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: 33296
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: 3802
Loc: New England
Make sure whatever you use is gas-proof!
_________________________
1979 Coupe de Ville, 542 stroker, Super Tech 15W40, Purolator
1995 Dakota, 5.2, VWB 10W-30, Motorcraft
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: 1375
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 - 15,000 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: 362
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