Gas tank problem

[6768chevylover]

I bought a replacement gas tank from cpp for my blazer. I installed it just to see fitment and if anything was gonna be in my way. Well after looking around everything looked good till I noticed the filler neck on the tank is just right behind the 2nd to last body mount. It doesn't even look like I have room to put a hose on it. Has anyone else ever run into this and what did you do to fix it? Thanks, Mike

[Chad22873]

Most, if not all of the replacement tanks just have a short little neck on them. That will not work for a blazer and even if you do get a hose on it and wrap it around the body mount, it will never work right. You have to cut the old neck off of your original tank and braze it on to the new one. Perhaps someone else has some idea that has worked but this is the only good option that I am aware of.

[6768chevylover]

So much for oem replacement.. Anyone have a picture of the original tank with the correct neck? I replaced a 50 gallon tank which of course isn't original so I don't have an original to go by...

[tjsblazer]

Look in this thread, linked below.

http://67-72chevytrucks.com/vboard/s...d.php?t=699273

[A1971Blazer]

Original tank with original neck 1971



This '70 I just got has a replacement tank with the short neck.....it's almost impossible to put fuel in because the hose is so kinked
I'm gonna pull it out and swap necks off the old tank.

[tjsblazer]

As stated most swap the old neck from the rusted out tank, however, I have read of some bending a piece of tubing to a similar form. I would imagine an exhaust shop may be able to do this.

[4oldcars]

Can I butt in - - I have a replacement tank in my 71 Jimmy installed by PO. It will only fill very slowly. I have pulled it and checked vent lines. Everything seems OK. Could the neck be the reason for slow fill?

[Rspaeth]

I have a LMC tank that had the same problem. I just moved it forward around 2" so it just barely cleared the body mount, then re-drilled the holes in the frame.

[Custom.Chevy]

Sounds like people with original tanks are better off refurbishing there tanks in which there are several methods of doing so. I have thought about changing my tank out in my c10 since i have found some nasty stuff in my fuel filter but it just doesn't sound worth the trouble. Its a lot easier to change out the 3 dollar filter once a year. Plus my tank is so covered in oil/grease residue from almost 40 years of driving there is not a single spec of rust on the outside.

[tjsblazer]

Originally Posted by Custom.Chevy

Sounds like people with original tanks are better off refurbishing there tanks in which there are several methods of doing so. I have thought about changing my tank out in my c10 since i have found some nasty stuff in my fuel filter but it just doesn't sound worth the trouble. Its a lot easier to change out the 3 dollar filter once a year. Plus my tank is so covered in oil/grease residue from almost 40 years of driving there is not a single spec of rust on the outside.

I agree if your original tank is useable it is the best way, however, how it looks on the outside can be very deceiving. My original tank looked great on the outside having always been in a dry climate, however, the inside was absolutely full of rust. Moisture had gotten in the tank.

[6768chevylover]

Moving it sounds a little easier than trying to fab a neck and welding it on or relocating it on the tank.

[Chad22873]

If you get specs, most welding shops and even many radiator shops will make and weld the tube on the new tank for you. I agree with previous comments that there are many many original tanks that look fine on the outside but they are full of rust on the inside. Depending on the level of restoration you are doing, in most cases I would opt for a new tank every time.

[chastain90]

My original tank had a few pinholes in it from where it sit with gas in it for years and finally leaked thru. I took it to a local radiator shop and had it "boiled out" and cleaned and then he soltered the holes up. I then put POR-15 gas tank sealer in it to prevent future rust. Its been fine ever since. Just a thought if you want to keep your old tank. Since it was out I also cleaned out all the vent and gas lines with compressed air.

[chastain90]

Also, only cost me around $60 for all of it. Way cheaper than a replacement tank.