I'm in a difficult stage of my life...
... Too young for medicare and too old for women-to-care.

Today's Birthdays
Greenman
Wha Sup?

-25 Years and older are eligible for judging-

All Years Welcomed!
-25 Years and older are eligible for judging-
Featured Chat Guy (or Gal)
Registered: 05/01/05
Posts: 188
VCCA Member Photos
1948 Aerosedan
Six Cylinder Tour Photo
Thirsty wood spokes
1935 rocker arm assy
1965 Impala SS
1965 Chevelle Malibu SS, March, 2014.
VCCA Projects
My recent Barnfind '31 Chrysler D R-S Roadster
32 sedan rear view mirrorcustom mounting
1927 Chevrolet Imperial Landeau
1927 Chevrolet Imperial Landeau
Vacuum shift 1940
Top Posters
Junkyard Dog 23833
Chev Nut 18675
Chipper 13299
MrMack 11147
AntiqueMechanic 8785
42bill 4886
Bill Barker 4631
wawuzit 4446
Tiny 3655
41specialdeluxe 3436
tonyw 3033
kevin47 2698
chef-chevy 2535
jack39rdstr 2407
Back Roads 2393
Top Posters (over the past 30 Days)
Junkyard Dog 235
Chev Nut 212
Chipper 96
BearsFan315 82
brewster 76
41specialdeluxe 66
chef-chevy 65
Ken_Naber 54
jiaccino 37
John 348/340HP 36
Tiny 34
m006840 31
dfd37chev 29
Rustoholic 27
ruscar 26
Topic Options
Rate This Topic
#130765 - 11/11/08 09:34 PM 1975 Corvette Fuel Tank Bladder
canadiantim Offline

Backyard Mechanic

Registered: 06/25/07
Posts: 270
Loc: Alberta, Canada
Are there any failure issues with these bladders? The increasing alcohol levels in fuel have got me wondering about the life expectancy.

My car has only had about 5000 miles put on it in the last 25 years and I've kept it VERY, VERY FULL with stabilizer, some 2-stroke oil (car has true duals / no cat) and usually a quart of alcohol every fall to deal with any moisture but I plan on discontinuing adding the alcohol since there's now more in the fuel.

I've never had to touch the carb and it starts and runs great so it seems this process has been working well...so far. Anything that can be done to take care of this bladder?

Thanks

Tim



Edited by canadiantim (11/11/08 09:45 PM)
_________________________
1938 Canadian Pontiac Business Coupe (aka a 1938 Chev with Pontiac looking front sheet metal)
1975 Corvette

Top
#130779 - 11/12/08 06:04 AM Re: 1975 Corvette Fuel Tank Bladder [Re: canadiantim]
LKS454 Offline
Shade Tree Mechanic

Registered: 12/09/07
Posts: 36
Loc: Texas
That is a good questions I know on some of the older cars the alcohol eats the rubber up good. Your in Canada? How much alcohol is in your gas? Is it more than 10% I would avoid anything over 10% in the gas.
I live in Texas and so far the only gas that seems are at least it shows on the pumps with alcohol is at large trucks stops showing 10%. In my older corvette I stopped using that when I seen it on the pump, because it might eat my rubber hoses up. But even at that small amount we might be safe, just be cautious .

Top
#130824 - 11/13/08 07:39 AM Re: 1975 Corvette Fuel Tank Bladder [Re: LKS454]
canadiantim Offline

Backyard Mechanic

Registered: 06/25/07
Posts: 270
Loc: Alberta, Canada
Canada indeed. The percentages are about the same as the US - in "normal" regular gas it seems to be 10%Alcohol, mid grade less, high octane is less again. There is "gasohol" out there but I've never paid much attention to it. We just get to pay more for the gas but it's no different. We're getting a huge deal right now since the price of oil has droped; about $4.25 a gallon.

There were several percent in gas during the winter when I was a pump jockey 30 years ago. Not sure if it was to eliminate pump feezing at the stations or to prevent cases of "my car was fine before I bought YOUR gas"...maybe both.

At least your '71 has a normal steel tank. The bladder in my '75 has performed well but I wonder what the life expectancy truly is?
_________________________
1938 Canadian Pontiac Business Coupe (aka a 1938 Chev with Pontiac looking front sheet metal)
1975 Corvette

Top
#131090 - 11/17/08 05:33 PM Re: 1975 Corvette Fuel Tank Bladder [Re: canadiantim]
bowtieollie Offline


Backyard Mechanic

Registered: 12/15/01
Posts: 276
Loc: See the USA in your Chevrolet
Hi Tim,

Coming to this party a little late - but I could not resist the temptation to reply.

The fuel tank in a Corvette is one of the easiest to inspect for condition - thanks to a huge filler neck. You can put a mirror inside and look around.

If condensation is a concern - jack up the front of the car - and suck out the fuel at the bottom rear of the tank - the water will roll to the back (if there is any)

A few months ago - I took some fuel samples from several stations in my area. The purpose was to confirm the alcohol%
I was impressed to find the most at 5% - well below the 10% posted on the pump sign. Most likely, they are keeping it low - to prevent the % from going over the 10% allowed by law in certain states.

How long do they last? I have some tanks in my collection that are 40+ years of age and they look new inside.... I use STABIL year round and like you - keep the tank FULL.....
_________________________
Oliver J. Giorgi
Technical Advisor
1958 Passenger Car

Top
#131110 - 11/17/08 08:30 PM Re: 1975 Corvette Fuel Tank Bladder [Re: bowtieollie]
Chipper Offline



Registered: 11/22/01
Posts: 13299
Loc: The Great State of TEXAS
FYI,
Stabil has alcohol as a major component. I did not realize that until it ate the diaphram in a '31 fuel pump. I say ate but actually turned it into a black goo-like jelly. Since have changed all diaphrams to alcohol resistant material.
_________________________
How Sweet the roar of a Chevy four!

Top
#131115 - 11/17/08 09:37 PM Re: 1975 Corvette Fuel Tank Bladder [Re: Chipper]
canadiantim Offline

Backyard Mechanic

Registered: 06/25/07
Posts: 270
Loc: Alberta, Canada
Thanks guys,

I hadn't thought about looking inside the Vette tank until after I pulled the tank from my 38 but by then I had it filled to the brim with Stabil added. I went heavy on the stabil too but it's still probably not much more than a cup in a full tank. Good to be aware of the alcohol in the Stabil.

Next year I'll take a good look inside that tank since it is indeed so obvious!

Thanks
_________________________
1938 Canadian Pontiac Business Coupe (aka a 1938 Chev with Pontiac looking front sheet metal)
1975 Corvette

Top


Moderator:  Daryl Scott, harveyj, novasscott 
Your Status
Please login to post or reply.* * *
Send My Password
Who's Online
13 Chat Members (carsinsulators, 31chevyjg, chevy47, Bill Barker, THE OL COACH, a3alf, dfd37chev, Martinomon, chevrolet6, akdale, Joe's 37, Uncle Ed, 1 invisible), 34 Lookie Loo's and 14 Spiders or Bots online.
Key: Admin, Global Mod, Mod
We speak Chevy!
Time Flys!Since 12/16/2001
Previous Photo
Newest Chat Registration
jorgepatricio, Bobdoc1958, 47Chief, 1936chevylowcab, CharvetClassics
12798 Registered Users
VCCA Info Links
NEWBIES START HERE
CHAT HELP
* * *
Send My Password
Kill My Chat Cookies
* * *
VCCA Home
G&D Calendar
Judging
Club Regions
Join Info
* * * *
Forum Stats
12798 Chat Users
64 Forums
40444 Topics
292559 Posts

Max Online: 209 @ 05/12/11 08:44 PM
See the USA
In your Dinah says Hi!!

 

Notice: Any comments posted herein do not necessarily reflect the official position of the VCCA.