Gas tank bladder
Safety Car
Joined: Mar 2005
Posts: 3,503
Likes: 2
From: Raleigh NC
If the bladder is still secure, then a few ounces at best. If the bladder has become dis-attached and air has got behind it, then several gallons.
There's two ways to check bladder integrity. The first is to run the car out of gas and see how much gas it takes to fill it up. The second is to drop the fuel tank and look at it.
I dropped the tank. The bladder looks more like a liner made up of a dark brown woven material (looks like brown shinny fiberglass cloth) that fits the inner surfece of the fuel tank like it was vacuum formed to it.
There's two ways to check bladder integrity. The first is to run the car out of gas and see how much gas it takes to fill it up. The second is to drop the fuel tank and look at it.
I dropped the tank. The bladder looks more like a liner made up of a dark brown woven material (looks like brown shinny fiberglass cloth) that fits the inner surfece of the fuel tank like it was vacuum formed to it.
Melting Slicks
Joined: May 1999
Posts: 2,897
Likes: 0
From: Moon Township PA
Originally Posted by scotty13
how much more fuel would go in my 75' tank if i removed the bladder?
Actually, one of our members Paul B. had this issue. He was on a road trip (Corvette caravan if I remember correctly) and kept noticing that his tank would only take around 8-10 gallons. Long story made short, when he pulled the fuel fill neck, the bladder had pulled away from the side of the tank, restricting the amount of fuel it would take. IIRC, he pulled the bladder and all is well.
OTH, if your tank and bladder are fine, leave them alone. The amount of fuel you can add is negligible.
Gary
Melting Slicks
Joined: Apr 2001
Posts: 3,399
Likes: 278
From: Olmsted Falls, Ohio
18 US gallons you'll have to do the imperial math....
I pulled the bladder on mine after it started to collaspe when I could only get 8-9 gal in and it would be filled. I would say you can gain about 1/2 gal by removing the bladder as it doesn't fit tight against the tank wall.
I pulled the bladder on mine after it started to collaspe when I could only get 8-9 gal in and it would be filled. I would say you can gain about 1/2 gal by removing the bladder as it doesn't fit tight against the tank wall.
Race Director
Joined: Sep 2002
Posts: 10,362
Likes: 5
From: San Diego - Deep Within The State of CONFUSION!
Originally Posted by GaryS
OTH, if your tank and bladder are fine, leave them alone. The amount of fuel you can add is negligible.
Gary
It's a paradox ....
On one hand, the bladder was good and dry. On the other, I can put more fuel in the car now.. Maybe the bladder was warped, seperating from the tank and wasting space????
Heck I really don't know. The most fuel I was ever able to get in before, was 11.5 gallons and now I can get in almost 14.I never have let her run dry though, I have no idea how far below 'empty' (on the gauge) it will go. 14 gallons will fill it up when the needle on the gauge is just a tiny bit below empty.
