Originally Posted by 2badgn (Post 4429585)

I might have to replace the fuel tank in my 1984 GMC Sierra 3500 Single rear wheel 2wd Pickup. It has one fuel tank and I think its a 16 gallon.

What are the advantages and disadvantages of steel fuel tanks and Polyethylene fuel tanks?

Thanks

Originally Posted by GM72K10 (Post 4429761)

Why do you think its a 16 gallon? They were only available on shortbed pickups that year Even the duel tank option was for 2 20 gallon tanks unless you had a shortbed i.e. CK10703 then it was two 16 gallon tanks.

Originally Posted by Chevyholic (Post 2614662)

I say steel. Depending on the mfg process of the poly there is a chance that all of the additives in the new gas can eat away at the inner lining and cause you fuel pump issues. I had a poly tank a few years back and I went through 5 fuel pumps before finally just replacing the poly tank and no more fuel pump issues. The lining was coming up and clogging the fuel pump until it stopped working. Serious PITA.

It goes without saying that I'm sure there are many people out there that have been running them for years without issue, but I'll never go back.

Originally Posted by crews (Post 2614942)

I vote steel.

I had put a poly tank in my 72 crew cab and I wasn't very pleased with the fit nor did I like how easily it was distorted.

Originally Posted by Classic Heartbeat (Post 2615176)

Polly or steel, it is up to you. However the poly tank is a lot tougher than the steel tank. Polyethylene tanks are produced from extreemly tough cross linked polyethylene. Polyethylene by itself is impervious to everything but fire. Even battery acid doesn't penetrate it and Cross linked Polyethylene is extreemly impact resistant!! MTS (The poly tank manufacturer) makes the tanks to twice as thick as DOT requires them to be, so believe me when I say it can take a big impact without rupturing. The hottest heat of the Desert South can not warp it. (Unless it hit more than 400 degrees or hotter!!) Anyone who has warped a tank, either didn't have it vented correctly and it only warped temperately while under suction pressure, or parked it over a fire. Most of your new cars all have poly tanks now and they are holding up just fine. Actually they hold up better than steel, because they do not rust!! They do not have a protective liner inside because they do not need one. Unlike steel to keep it from rusting.. Do what you want, but my vote gets poly!! (And I do sell both) WES

Originally Posted by snapdaddy (Post 4432850)

where do you get a Polyethylene fuel tank at