(GAS CAP) About 100,000 plus C5 Corvettes with rotted cap seals......................
05-02-2013, 07:56 AM
#1
Le Mans Master
Thread Starter
Member Since: Sep 2003
Location: Farmington CT
Posts: 6,125
Received 160 Likes
on
125 Posts
Cruise-In VII Veteran
(GAS CAP) About 100,000 plus C5 Corvettes with rotted cap seals......................
Take a quick look at the rubber/Viton? seal on your gas cap, most likely it's rotted and cracked.
The 100k C5's? just a WAG, with about a 250,000 produced, the vast majority are approaching the decade mark.
This may be a quick/solution to the gas vapor smell or avoid a PCM Evap code.
The 100k C5's? just a WAG, with about a 250,000 produced, the vast majority are approaching the decade mark.
This may be a quick/solution to the gas vapor smell or avoid a PCM Evap code.
05-02-2013, 12:58 PM
#2
Tech Contributor
Member Since: Dec 1999
Location: Anthony TX
Posts: 32,736
Received 2,180 Likes
on
1,583 Posts
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Murphy's Law made mine fail the day before I had to get the emissions done on the damn car. 
Out of desperation, I coated the damn cracked O ring with Black RTV and put some celaphane wrap over the seating surface on the filler neck. Screwed the cap down tight and the next morning I removed the cap and the celaphane wrap. No more cracks and no more leaks no more codes!
Cap passed with flying colors. Its a TEMP fix but, hey,, it worked.
Steve
Do you have the any data/info on the correct O ring size for that cap?
Yes,,, I have see NUMEROUS caps with nasty cracked O rings. Now I can add mine to the list!
Out of desperation, I coated the damn cracked O ring with Black RTV and put some celaphane wrap over the seating surface on the filler neck. Screwed the cap down tight and the next morning I removed the cap and the celaphane wrap. No more cracks and no more leaks no more codes!
Cap passed with flying colors. Its a TEMP fix but, hey,, it worked.
Steve
Do you have the any data/info on the correct O ring size for that cap?
Yes,,, I have see NUMEROUS caps with nasty cracked O rings. Now I can add mine to the list!
05-02-2013, 08:40 PM
#5
Tech Contributor
Member Since: Aug 1999
Location: Should this thoughtful, valuable contribution meet with no acknowledgement or 'thanks' this post----
Posts: 16,382
Received 399 Likes
on
257 Posts
Are you sure it is Viton? That is one of the most expensive elastomers, due to its chemical resistance.
05-02-2013, 10:26 PM
#6
Le Mans Master
Thread Starter
Member Since: Sep 2003
Location: Farmington CT
Posts: 6,125
Received 160 Likes
on
125 Posts
Cruise-In VII Veteran
They go bad, gas caps are cheap, avoid PCM OBD2 codes, pass emissions tests, avoid gas vapors............spend time on the better things in life
Steve
05-04-2013, 06:07 PM
#7
Team Owner
Thanks.
Hope you're doing well Steve.
I swear, I'm going to bookmark your profile page and go through all the threads you start like this once I get back into a C5.
Hope you're doing well Steve.
I swear, I'm going to bookmark your profile page and go through all the threads you start like this once I get back into a C5.
05-05-2013, 01:16 AM
#8
Team Owner
When I failed emissions a couple of years ago I just bought a replacement cap at AutoZone. It's not the greatest quality, it's hard to turn for clicks, but it works.
