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You're on borrowed time...
But the good news is that replacing the tank is one of the easier jobs.
And new tanks aren't that costly.
For me, removing the tire carrier was the issue as one of the carrier bolts was rusted in place - otherwise pretty straightforward process.
Miles, having replaced more of these tanks than I'd like to admit (on my own cars) I believe it is foolish to try and save it. The cost of a new Quanta tank is just not that expensive. Of course if you have a lot of time on your hands and don't mind pulling it a 2nd or even a 3rd time, go for it.
I have changed them a few times on a lift without having to remove any of the exhaust. Others have said they needed to remove one or both sides. Pay attention to how it comes out and it will go back in much faster than it comes out.
If you do remove the tank, be sure to check out the FUEL SEPARATOR VALVE on the top, left corner of the tank. These do deteriorate over time and begin to leak. The plastic gets brittle and it isn't unusual to break the nipples when removing the rubber hoses. The good news is that they are now being reproduced. Considering old originals in unknown condition were bringing $75 at swap meets a few years back, $50 for a brand new one seems like a good deal.
Thanks for the input guys. Look's like I've got another fall project on my hands. I've been noticing it seems like I've been running out of gas when I've been getting one it (quickly getting up to highway speeds then holding that higher RPM will cause my engine to stutter out). Fuel filter is new so that's not it. So I'll be replacing the fuel pump and gas tank this fall. I need to replace my accelerator pump too so I'll probably get a new float as well. Hopefully that will solve my problem.
Thanks again guys.
Miles
Last edited by randommj; Jun 18, 2018 at 09:52 AM.
Thanks for the input guys. Look's like I've got another fall project on my hands.
Miles
Sooner rather than later is safer. Once you start to smell gasoline dripping on your hot mufflers you are driving around in what the military refers to as a 'thermobaric' weapon. Been there!
Be sure to replace the rubber fuel line connecting the hard lines to the tank. That and the fuel separator mentioned earlier and you're set for a decade .
Thanks for the input guys. Look's like I've got another fall project on my hands. I've been noticing it seems like I've been running out of gas when I've been getting one it (quickly getting up to highway speeds then holding that higher RPM will cause my engine to stutter out). Fuel filter is new so that's not it. So I'll be replacing the fuel pump and gas tank this fall. I need to replace my accelerator pump too so I'll probably get a new float as well. Hopefully that will solve my problem.
Thanks again guys.
Miles
Replacing the tank is an afternoon job. Maybe a weekend for some but pretty easy, none the less. A friend to help is not necessary but does make it much easier. If it is leaking you don't want it in your garage nor do you want to drive it.
Where do you think the rust is coming from? In my case I believe it was condensation accumulating in the bottom of the tank. It's a good idea to occasionally put in an additive to take care of the water. I'm going out to the garage right now, haven't done that in a while.
Too far gone imo. Coatings rarely last..seems eventually you suck up rust usually when its least convenient. You have the peace of mind youll never get stranded anyways.
I have seen fuel tanks that look like this and an awful lot of trust is being put in the integrity of the sock filter that is on the sending unit. Hopefully shows that it has not been torn at any time.
I also look at how the inside of the tube of the sending unit looks. I have seen them very rusty with a lot of scale and that can cause for a fresh fuel filter to get plugged up rather quickly. Which ahs happened to me on some customers cars where a month later of consistent driving...the fuel filter when removed and broken open showed it to be plugged up.
I also advise on fuel system like this IF the integrity of the steel fuel line on the frame by the fuel tank and the sending unit tube is rusty that the fuel pump also be changed out due to rust particles can collect in the bottom of the reservoir of the fuel pump.
I know I am often times the bearer of bad news when customers bring there Corvettes in for inspection or service. But what else am I supposed to do. NOT be a competent mechanic. I cannot close one eye to it and not let them know what is wrong....which is why I am just passing along OTHER things to consider even though it can cost more money and time
If you are not restoring the car to NCRS , I would suggest a Stainless Steel tank. You can get a tank with an electric pump installed - just be sure to tell them if it's a carb or injection.
Replace all hoses and the vapor separator + neck gasket.
The electric pump stops the need for cranking when the car sits for a week or so.
Last edited by BLUE1972; Jun 20, 2018 at 06:13 PM.
Reason: hate auto spell
Rust in the gas tank.
