Gas tank on my '84 is pretty much welded in place .

But, I think its the same as my '89, and I've had that one out.  Its really pretty easy if the bolts aren't too rusted.

Remove the fuel lines from the top/front of teh tank.  I believe they connect with short rubber hoses and clamps on the '84 - easy enough to remove.  Just pay attention to which goes where (supply, return and vent lines, I think)

Remove the filer neck - also held on by a hose clamp.

The bolts, two of them, hold together the straps that secure the tank in place.  They're at the back of the tank, in front of the rear bumper.  Remove the bolts and bend the straps down and the tank will slide out towards the back.  You may have to cut these bolts if they're in bad condition.  You can't buy replacements that I know of, but they are easy enough to make out of all-thread form the hardware store.

If you have a trailer hitch you may need to remove it.  My dealer-installed hitch is very thoroughly welded in place, effectively trapping the gas tank forever.

 

yea i have the tow hitch on it. i havent looked at it yet due to my 2 year old having a cow when daddt goes to fix the truck today. im trying to figure a way to get the gas out so i dont run any nasty gas through this fresh motor. im going to wait till she takes a nap with mommy and crawl under the truck to see how it looks. i have a week toget the truck done.

 

in my world l,d get an electric fuel pump [i have one] and suck the tank dry that way

 

yea thats been the plan for the last year, but since i havent been able to get a job in that time it got blown outta the water. i have a friend with one thats about 16 miles away and when he comes by he always forgets it. but i have to go that way this weekend i think and im gonna stop by and pick it up. what about the crap insidethe tank? wouldnt there be like a film or a tarnish or something? i was thinking of dropping a couple gallons in it after its sucked dry and pump that out again to be sure its all removed. thanks

 

And the chances are ur gonna have to replace the fuel tank strap bolts. I have done 2 tanks and had to make new bolts for each. I just take out the back bolts and let the straps hang its less work when u go to put it in. The bolts at the back have a curve in them. Just heat them up and give them a bend in a vise. Make sure they have some length on them becuase nothing is more aggravating then when u go to put the strap on and only 1 thread is able to grab and u have to push like hell to get a nut on when ur in the garage by ur self at 9pm at night. Ask me how I know. lol but its not a hard job at all. Oh and when u do drop the tank watch out for a shit load of mud and dirt to fall in your face aswell.

 

Oh and when u do drop the tank watch out for a shit load of mud and dirt to fall in your face aswell.

Hey now, you got to let him learn some things on his own

 

Ya good point no one was there to warn me lol

 

I would replace the fuel lines if it were me, not unless they have been done before, after dropping my tank on my 93 the lines were all rusty, so I just replaced them and not worry about blowing them out. You can also take off the filler hose and suck out the old fuel with a hand pump if you don't want to take the tank all the way off.

 

I got to looking on other sites after searching "disolve fuel tank varnish" and here's one reply on a forum

06-26-2007, 10:27 PM
You can try denatured alcohol - it's about the only thing I've found that will attack the gum, but it's slow. I've tried mineral spirits, brake cleaner, carb cleaner, acetone, good gas - only denatured alcohol has any effect on it...

...but if you can find a rad shop to do it reasonably, do it. Trick is, the EPA is all over rad shops & it's getting expensive (at least around here) to have a tank boiled...


This sounds about right as a disolving agent. I'm taking it your not really wanting to afford the cost of a radiator shop boil, so this may be much cheaper an alternative. And much better if the tank is out and you can swish it around a bunch of times during your day on the weekend or something, to get all the sides and bottom.

 

yea im just going to get an electric pump and pump it out and run something through it again to help with the dissolving.

 

just put in a filler neck gasket, and all other rubber on the tank, pain in the keister, getting all that crap back together, new trans/atv jack worked like a charm, found out the skid plate was held in place by the 2 bolts on the hitch, real hack job.    
as far as the varnish i would recommend using an in tank cleaner with a full tank and light duty dilution for many tanks, as full concentration of cleaner could clog your fuel system,

for old fuel treatment i would sta-bil and marvel mystery oil, for the old varnish stuff, after a few tanks use whatever cleaner / treatment you like.

Mike

 

Where can I get a replacement gas rubber filler hose for my 1989 RC?

 

ok guys, i have to drop the tank in my rc to clean out the old gas thats been in there for almost 2 years. my rc is almost ready to go and theres no way im going to start this new built motor with some old schwaggy gas in it.

...I dunno - two years really isn't that bad. IMO, I'd dump in a full bottle of Seafoam, top off the tank with fresh fuel, and fire it up - I think you'll be completely fine.

You can also take off the filler hose and suck out the old fuel with a hand pump if you don't want to take the tank all the way off.

If you really want to run 100% fresh fuel, I agree with just siphoning out the old fuel, then dump in a bottle of Seafoam, top it off, and go. No real need to drop the tank. When I need to siphon fuel I have/use a regular off-the-shelf 12v electric fuel pump with a few feet of rubber hose on both ends - one end into the tank, the other into a gas can, and just grab a 12v battery, connect the wires, and let the pump do the work

- Sam

 

...I dunno - two years really isn't that bad. IMO, I'd dump in a full bottle of Seafoam, top off the tank with fresh fuel, and fire it up - I think you'll be completely fine.



If you really want to run 100% fresh fuel, I agree with just siphoning out the old fuel, then dump in a bottle of Seafoam, top it off, and go. No real need to drop the tank. When I need to siphon fuel I have/use a regular off-the-shelf 12v electric fuel pump with a few feet of rubber hose on both ends - one end into the tank, the other into a gas can, and just grab a 12v battery, connect the wires, and let the pump do the work

- Sam

This thread is 5 years old. The poster previous to yours asked an unrelated question and resurrected this thread.

Where can I get a replacement gas rubber filler hose for my 1989 RC?

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