Poly vs Steel Blazer Tank???
 

Am relocating my internal cab tank to between the rear frame rails. Wondering whether I should go with a poly or steel Blazer tank. Can any of you guys comment or make any recommendations based on experience?

The polly tank is a little more flexable in it's aplication. You can heat the fill neck on it with a hot air gun and move the direction it is pointing some. Poly tanks don't rust or dent either. WES www.ClassicHeartbeat.com

But if you live in the heat like I do(its 119' outside right now), I heard that the Poly tanks can warp and stay that way. I have the steel one b/c it was cheap, plus I don't want to have to worry about something happening to it.

I prefere the "custom" tanks available in aluminum, they are not as deep, therefore do not hang down as far. I think the blazer tank is 14" deep, thats alot of tank below the bumper. A 4-wheel drive lifted truck it looks fine, but one lowered really magnifies the "low hanging" tank. J.M.O. tho

i heard in the southern states when it gets real hot the poly tanks will collapse cant prove it just heard it lol......I am going with a no limit tank

poly vs. steel gas tank
 

I'll share with you what I have learned from owning and installing both of the aftermarket tank types. First one I tried was the poly tank setup. Should have sent it back as soon as I opened the box and saw how poorly the sending unit opening ring was attached to the poly tank. Then I was ready to install the locking ring and noticed that it looked like it had been drug across cement at a high rate of speed. (Really poor workmanship). Oh well, I figured, if this is how the put them out to the public I'll give it a try. Had to cut out a bed support between the frame rails and still had a ***** of a time properly positioning the neck of the tank to take a straight run of rubber filler hose to it. Oh yea, almost forgot, the inlet on the poly tank looked really small, like 1" i.d. (wait till you hear about that). So, I get the tank in place and connect the length of odd size filler hose to the tank neck, (1 3/8 i.d. hose, really hard to find), have a friend of mine fab up a steel filler tube to run under the bed a come up through the bed right behind the drivers side wheel well, up the inside of the bed to the filler neck a bought from Classic Industries. Also hooked up the largest vent opening on the tank,(1/2" i.d.), to the filler neck with proper vent hose. Well, the dam thing would never take gas from a pump unless I held the nozzle barely open, (maybe had something to do with that 1" tank opening design flaw), anyway I eventually got the tank filled one day getting ready for a fishing trip with my son and stopped at a tackle shop right before we went on this two hour drive to the lake. Smelledgas real bad and looked under the truck to see gas pouring out onto the parking lot from the sending unit opening. Needless to say, that tank went back to the junk vendor that sold it to me for a full refund!! Good thing a had not yet removed the old tank in the cab. So I'm at Carlisle, PA Truck show and 'The Truck Shop' has a show special on a steel Blazer/Sub tank and all hardware for a price I could not resist. I get it home and install it about 2" to the rear of where the indexing tabs go into the original frame rail holes so the long steel filler neck it came with can clear that darn bed support. No Problem. Nice large opening at the tank for gas flow. Hooked it up to same piping and it fills really sweet. Galvanized stell looks really good in my opinion. That was a long story I know, but by reading this hopfully I can save someboby from buying that trash poly **** of a tank.

I agree the poly tanks suck when the original tank in my panel rusted through I replaced it with a poly tank the opening is too small and it leaks gas if I fill it all the way up I will put in a steel tank soon Like 72longbed said they suck.

i just (today) fixed my filler so i can fill it at the pumps full speed, other than that i have not had any problems with it. i just posted a thread (poly gas tank filler) and it shows what i did.

Michael

When I bought my blazer it had a poly tank allready installed.I had to drop the tank to replace the sending unit.It filled semi slow.Turned out the installer had about 1.5 inches to much filler hose.Cut that off and it fills on high speed.The opening is the same as stock on my tank.It is also thick.I will see if I can find who made it.

Poly tanks DO collapse in the heat. Mine has and I know of some in Arizona that have.It's been about 114-116 degrees here for about a week but I had a problem with it after about 3 months. It's been in about a year. There was also a letter in one of the truck magazines about the problem. The answer from the magazine was "yes they will collapse from the heat". Mine is vented correctly. I just got a tank from No Limit and I'm in the process of moving so it will go in as soon as I get a chance. I know people say that the new trucks have poly tanks and they are ok. I have one in my Tahoe but they are much thicker and better made then the blazer poly tank. Go with a metal tank!

I agree. I have tried two of the poly tanks with no luck. Same problem. Gas will flow out of the top when you try to top it off...


Get a metal one!

I have installed several of both kinds of tanks and the steel ones are better because they don't collapse and because the poly ones shift around on the frame rails (no matter how tight they are) and it looks like over time it could wear through the tank

What has every one done to locate the gas filler? I dont like the idea of purring in the bed. Any suggestions pics?

Where to put the Filler?
 

MCLMXIX,
As I said earlier , I have my filler running up inside the bed side just as the Blazers did from 69-72. I am even using one of the original Blazer steel covers to hide it. ( Covers were also used on all pickups with factory auxilliary tank). Only difference in my setup is I didn't cut through the bedside, and screw up my new paint job, to mount the neck. The cap is inside the bed at the top of the filler neck slightly below the top rail. The cover hides almost all of it!! Hope this helps.

Gee, I have a poly tank that I got from Wes, and I haven't had any filler problems. Don't think it warped, either. I think the poly is as thick as the one in my Tahoe. It's been in 5 or 6 months now. It's about 105/106 right now.

It doesn't matter where you bought it Busterwivell they are all the same. You better look again because it's not made anything like the one in a Tahoe. Sounds like you are having good luck with yours.