Hi there,

I recently bought a 72 CS Convertible. Great car, still some things to do.
One thing is that the previous owner removed the fuel tank as he installed a liquid gas tank in the trunk and the car is running with gas, which is much cheaper in Germany.
Nevertheless I like to reinstall the fuel tank to have the possibility to switch between gas/fuel
The fuel tank I got with the car is completeley rusty, I won't reinstall it, so I'll order a new one next to few other things I need from US.
According to most postings here people suggest Spectra GM34Q. Rockauto says Gm34R. What is the difference? As far as I can see both 34Q have 3 vents? Please find attached a photo of the tank I got with the car. I think it has 2 vents? Or does the big hole count as a vent?
Sorry for bothering, but as the tank will come over the ocean I like to be sure what I order :-)

Thanks and Regards,

Marc

 

I'm not sure about how they count the vents, but I must say that that tank looks perfectly fine.



- Eric

 

Spectra/Quantum (Canada) is the only place Id purchase a tank from. Stay clear of off shore tanks...oh wait you are off shore...I mean... you know what I mean.
Call or email Spectra/Quantum. They are easy to converse with. They likely sell to/supply Rockauto, in fact I think they do. So its likely the same tank. And it should work for your application.
Whats the difference between fuel and gas in Germany? Both are liquid. Fuel generally means Diesel here. Do you mean liquid propane (LP)?

 

It looks a little crusty down by the seams. I'd swap it. Its cheap insurance.
To me, its one of those things if you put it back in, that's when it starts leaking.
GM34Q is two vents. I used it on my '70Cutlass. It fit like a glove.

 

Sorry for the confusion....yep, i mean LPG. Which names here gas. While your gas is here fuel. And Diesel Diesel :-)

@Eric: you wouldn't say that if you would see that the guy cutted the filler neck :-)

Well, the more I try to find the less I get it. Seems that the GM34Q is for 1970 and has 2 vents. GM34R is for 70-72 and has 3 vents. Well, my car is from 72 and has def. 2 vents. Oh boy...well, i think its easier to close one hole if its not needed then to make a new one.
I thought that this kind of mess was dedicated to my 86 Jeep Wrangler,(there was a heavy OEM mixing between CJ and YJ) but I think that this is part of the charme of old american cars :-)

Marc

 

My suggestion: Buy an EFI tank from Tanks, Inc, which has the internal sump, it's not much more expensive:

http://www.tanksinc.com/index.cfm/pa...rod/prd387.htm

That way you have many options moving forward, like in tank electric pump, EFI, etc.. Not to mention the sump allows for positive pickup of fuel down to like a half of a gallon of fuel.

If you want to use an external electric or a mechanical pump, you can also order the pickup module:

http://www.tanksinc.com/index.cfm/pa...rod/prd362.htm

I strongly recommend replacing all rubber fuel lines.

You can look at my install thread for fuel lines and pump to get more info on the tank and pickup.

https://classicoldsmobile.com/forums...tml#post669931

.

 

Well, that, as we say here, is a horse of a different color, then...

- Eric

 

That EFI tank is a good deal. I bought the old style tank and wish I had the sump in that EFI tank. I can still hear a couple of gallons sloshing around in my tank after the fuel inlet starts sucking air.

 

Thanks all for your replies.
I think I try the cheap GM34R solution as the car will run to 99% on LPG (price per liter is a third!!!) and the gas will just be for backup in case that I won't find a LPG station (I have 100l tank for LPG so I have time to search :-))

Marc