Fuel system contamination

[DirtyComanche]

On an older, mid 70s GM with saddle tanks, but hey, it would still apply if it happened to a MJ... It quit. Pulled the fuel filter, rust, water, a little gas... So, dropped the tanks. The right tank was half full of water, and about 1/8 of gasoline, and a bunch of skuzz and $#!&. The tank was new (about 6 months), and has started to develope some rust on the inside... The other tank had some water, but not much (enough that it was picking it up intermittantly).

 

Anyways, so I dropped both tanks and emptied them as much as possible. They still aren't as clean as I'd like. Short of trying to snake my arm in there to wipe them, is there a good option for cleaning? Are any of the avaliable gas tank coatings worthwhile?

 

For the rest of the fuel system, I put some clean fuel in a cup and put the pickup hoses in it, then cranked the motor over (mechanical pump) with the fuel line off the carb until I got clean fuel out. Anything else I should do? The filter is on the inlet of the quadrajunk, and I don't know how much $#!& got through it to the inards of the carb. Short of a rebuild, is there anything else that should or could be done? Or just let it be?

 

Ugh.

[Randy in Maine]

You might try doing a POR-15 thing...

 

http://www.por15.com/prodinfo.asp?grp=TS&dept=12

 

http://www.canada-por15.com/por-15-tank-sealer.htm

 

I used a quart to do my 15.6 gallon tank for my bus. Might need 2 do do both saddle tanks. Good prep is the key to success.

 

If you do it, just buy the quart of "US Tank Sealer", 1 gallon of "Marine Clean) and 1 gallon of "Metal Ready". That "Marine Clean" is the best de-greaser I have ever found and the "Metal Ready" is a nice phosphoric acid for etching metal prior to painting. I use them both all of the time. Cheaper. Might be able to get it at some FLAPS in BC someplace with no shipping.

 

Here are a couple of my buddies using it...

 

http://www.ratwell.com/technical/FuelTa ... ation.html

 

http://www.glenn-ring.com/tech/gas_tank_resto.htm

[Car RamRod]

Take the fuel line off the carb and blow air down it (assuming there are no more inline filters).

 

Put a clean rag near the other end so you can see the $#!& that blows out.

[DirtyComanche]

Take the fuel line off the carb and blow air down it (assuming there are no more inline filters).

 

Put a clean rag near the other end so you can see the s#!t that blows out.

 

 

There is no other filters, but there is a pump. I don't think it'll blow through that. I wanted to change all the lines, but I need some time to do that. And as it is, I think I will wreck the lines if I try to undo them from the pump. I might just throw it back together and get it running for now. I'm half tempted to rebuilt the quadrajet, since it would appear that it had water sitting in the float bowl. I would assume this will cause problems down the road.

 

 

The POR setup looks good. Might go that route...

[FxRacing282]

just run some clean gas through the carb and it will be good. i suggest replacing the little 1'' filter in the carb. once this is done go to a auto parts store and get an inline filter. preferbly clear one so you can see what running through it. the extra filter will do magic in terms of filtering out debris and its not enough drag to actually hinder the carb. i would do a test to make sure the mechanical pump is pushing enough fuel at the right psi. i believe its 4-7 PSI and it should come out nicely not on/off/on/off

[HOrnbrod]

:agree: The Quadrajunk carb filter is nearly useless. Put a quality inline filter in similar to what our MJs have. :cheers: