Aux Gas Tank Leak

[PPiazza]

My aux gas tank is leaking when I am on a hill. After searching the board I am 90% sure its the seal around the sending unit. I am a bit intimidated about working on the gas tank. I really dont want to blow up me and the house.

How tough is it to change the seal and any help or suggestions would be apreciated. Is this the parts I need, http://broncograveyard.com/products/cat/13/7/10222SET how easy is it to take off the ring and put it back on.

Thanks.

 

[Past_Miner]

Those are the right parts. You might be able to re-use your lock ring, but for $7 I would just replace it.

The lock ring can be kind of hard to get off sometimes. They just get full of gunk over the years. Run the tank empty or drain it before you work on it and you shouldn't have any problems. I always use a brass drift and small hammer to turn the ring. That way I don't generate any sparks.

 

[FNG]

ditto Past_Miner on the brass punch part. I would also add do it out side with plenty of ventilation. It's the fumes you need to be worried about. Most explosive and dangerous to breath. LMC truck also has a lot of tank parts and their cataloge is free over the net. Good luck.

 

[noreasteb]

Removing the sending unit on my 77 aux required me to drop the tank. This only took me about 15 minutes to do and I had about 3 gal of fuel left in the tank.
I did not worry about trying to save any of the old rubber hoses so i just cut them w/ a utility knife.
As mentioned above - use a brass hammer or something that will not cause sparks to get the retainer ring off. Mine came off without a problem. When reinstalling I went to the local parts store and purchased all ne rubber hoses. the only tricky one is the 90 deg bend hose for the filler. I found a pre-bent radiator hose to do the trick. I can get you the part number if you like (cost $10 vs $45 in LMC). Good luck

 

[Unregistered]

Aux tank Filler Hose

I need to replace my 77 Aux tank also I have been looking for all the pieces before I start, the filler neck hose is one I was looking for.
Would you post the hose number You used?
Thanks
Knox

 

[Brewbro21]

When I bought my 72 the rear tank was already a 23 gallon, however what I soon found out was that the exhaust ended up rubbing a leak in the seam, so I replaced both my tanks at the same time it took about 4 hours or so to complete. The mechanical skills needed for this are minimal.

It's safety that one needs the skills in, when working on a gass tank always try to run the most fuel out as possible so you don't have to worry about draining the tank, that's usually always a mess, then you have problems. Just work in a ventilated area and wait to have your victory smoke till you're all said and done.

If you're that intimadated by gas then you might want to have someone else do it for you.

 

[72moore]

Aux

Removing the sending unit on my 77 aux required me to drop the tank. This only took me about 15 minutes to do and I had about 3 gal of fuel left in the tank.
I did not worry about trying to save any of the old rubber hoses so i just cut them w/ a utility knife.
As mentioned above - use a brass hammer or something that will not cause sparks to get the retainer ring off. Mine came off without a problem. When reinstalling I went to the local parts store and purchased all ne rubber hoses. the only tricky one is the 90 deg bend hose for the filler. I found a pre-bent radiator hose to do the trick. I can get you the part number if you like (cost $10 vs $45 in LMC). Good luck

Send me the part number on the 90 degree hose if you get time moreoldfords@cs.com Thanks
;D

 

[chrisd0729]

Yeah, I'm interested in the hose part# too. I cut mine off thinking it would be a $10-15 part and it was rotted anyway. Then I see the $40-50 price tag!!

TIA

 

[noreasteb]

Alrighty guys, got the part number for the filler hose for the aux tank. A quick note though, I replaced my oem tank with one from Wild Horses and the filler neck dia was larger than the dia on the tank inlet. But the part number is from AutoZone at 61323 plus 395 printed below in slightly larger print. Not sure of the vehicle it was intended for but worked well for me with little trimming and no leaks.

 

[77sport]

a word of caution about using radiator hoses for fuel lines. they are not formulated for use with gas and over time will soften and swell and fail, usually at the worst time. i have seen them come apart. they would be ok for a temporary fix but for the long run invest in the proper hoses. the same for the 5/8" vent line, get fuel rated hose dont be tempted to get heater hose. napa sells the fuel rated hoses.