Go Back   The Ford Barn > General Discussion > Model A (1928-31)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 07-17-2010, 03:02 PM   #1
Brentwood Bob
Senior Member
 
Join Date: May 2010
Location: brentwood, ca
Posts: 2,808
Default Black stuff in gas tank

Several of us have flushed, and filtered gas from gas tanks to remove a black flacky stuff out that is clooging up the fuel line. I used coffee filter and plumbed a 1/4 inch line from the outlet(31 indented firewall) out over the fender to a large funnel and a 5 gal gas can.There was a shutoff valve right out of the tank. then I put a short nipple and an elbow.
Any body know what we are fighting? What is that black stuff?
Brentwood Bob is offline   Reply With Quote
Old 07-17-2010, 03:55 PM   #2
Dennis Pereira
Senior Member
 
Dennis Pereira's Avatar
 
Join Date: May 2010
Location: Georgetown Divide Kelsey ca
Posts: 718
Default Re: Black stuff in gas tank

B P gas sorry
__________________
Dennis in Kelsey ca
Dennis Pereira is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 07-17-2010, 07:29 PM   #3
Ron in Quincy
Senior Member
 
Ron in Quincy's Avatar
 
Join Date: May 2010
Location: Quincy, CA.
Posts: 1,708
Default Re: Black stuff in gas tank

Hopefully its not old tank sealer that was available in the early 80's; it was not impervious to the additives in the gasoline and would, over a period of time, start desolving the liner.

Ron
Ron in Quincy is offline   Reply With Quote
Old 07-17-2010, 08:30 PM   #4
sunnyorm
Senior Member
 
sunnyorm's Avatar
 
Join Date: May 2010
Posts: 358
Default Re: Black stuff in gas tank

i have a similar problem, i have gotten to it yet, but my model a mentor suggested i flush with water, to see if it breaks down
sunnyorm is offline   Reply With Quote
Old 07-17-2010, 09:00 PM   #5
Richard in Anaheim CA
Senior Member
 
Richard in Anaheim CA's Avatar
 
Join Date: May 2010
Location: Anaheim California
Posts: 382
Default Re: Black stuff in gas tank

I had the same problem from gas left in the tank for 9 years. It looked like permatex.

A friend suggested since it was gas, maybe gas would desolve it. Intreresting theory. I drained what was left in the tank and put fresh gas in and rocked the car every time I thought about it for several days.

It did start the process, albet slowly.

I drained it and dumped in two gallons of carbuerator cleaner, heated it with a shop quartz light over night and then flushed with water using a strong garden nozzle. It worked. Even the gas float disappeared.

My final sequence was Por 15 Marine Clean diluted 50% and heated with a shop quartz light overnight. It got about the temperature of hot coffee.
I rocked it around, drained it, flushed with afore mentioned nozzle and it was clean enough to eat out of. Replaced float with wine bottle cork.

I wasn't about to remove the tank and the paint.

Richard
Anaheim CA
Richard in Anaheim CA is offline   Reply With Quote
Old 07-18-2010, 03:48 PM   #6
Brentwood Bob
Senior Member
 
Join Date: May 2010
Location: brentwood, ca
Posts: 2,808
Default Re: Black stuff in gas tank

Could be an old tank coating. Each tank had sat at least one year before recent attempts to get the cars roadworthy. We stayed with the filtering and reflushing technique, but we only put thru 5 gallons at a time. We do feel that the pipe gives us a better flow out, Some of the black stuff is like round balls. Bob
Brentwood Bob is offline   Reply With Quote
Old 07-18-2010, 05:50 PM   #7
Ron in Quincy
Senior Member
 
Ron in Quincy's Avatar
 
Join Date: May 2010
Location: Quincy, CA.
Posts: 1,708
Default Re: Black stuff in gas tank

Ascetone will cut the old tank sealer. A friend of mine, who was concerned as his tank had been sealed, purchased 3 gallons of ascetone, put it in the tank; we rocked the A back and forth for about 10 minutes then drained the tank ; put a couple of gallons of gas in and did the process. When we were finished the tank was clean, he didn't have to repaint, and never had a problem in the future.

Ron
Ron in Quincy is offline   Reply With Quote
Old 07-19-2010, 12:26 AM   #8
Brentwood Bob
Senior Member
 
Join Date: May 2010
Location: brentwood, ca
Posts: 2,808
Default Re: Black stuff in gas tank

Acetone. One car has a nice paint job, but it has the worst problem. Thanks. We thought of lacquer thinner. I'm leaning toward the Marine clean. Thanks for the ideas. Bob
Brentwood Bob is offline   Reply With Quote
Old 07-19-2010, 06:28 AM   #9
Keith True
Senior Member
 
Keith True's Avatar
 
Join Date: May 2010
Location: Epping N.H.
Posts: 2,309
Default Re: Black stuff in gas tank

It does sound like a tank sealer,but to have several cars doing the same thing is kind of odd.That is,unless a bunch of buddies all did the same thing.Many years ago a garage here would mix up Permatex and alcohol,and swish it around the tank.The gas would not bother it,at least not for the last 35-40 years.Now they are all coming apart.It kind of looks like thin flakes of black oatmeal.For the most part it is being caught by the sediment bowls,I am seeing it on old tractors and most have the glass bowls.(except Fords) The guy that did it warned everybody not to use Cumberland Farms gas,they started selling Gasahol here in 1980.
Keith True is offline   Reply With Quote
Old 07-19-2010, 11:47 AM   #10
Brentwood Bob
Senior Member
 
Join Date: May 2010
Location: brentwood, ca
Posts: 2,808
Default Re: Black stuff in gas tank

What I filtered out was thin black flakes. The other car has a different type forming small balls in part of it. We both think we will see this problem again, and we are working thru it. Pulling a painted tank to clean, or replace with another would be difficult. I hope that on future projects I always make sure I know the interior condition of the tank first. I think I'll put a small hand held mirror in my road repair bag, this guy has a real hard time seeing the inside of the tank over the fenders.
Brentwood Bob is offline   Reply With Quote
Old 07-19-2010, 11:57 AM   #11
Ken Ehrenhofer
Senior Member
 
Join Date: May 2010
Location: Woodstock, Illinois
Posts: 596
Default Re: Black stuff in gas tank

The biggest component in Lacquer thinner is MEK. Methyl Ethyl Ketone is in the same family of solvents as Acetone. Be very careful when using as they are both very flammable. both will remove lacquer paint upon contact so make sure you do not spill on the paint surface. Do not create sparks when working with it. We use to use brass scrapers and hammers in the painting industry so we could not create a spark.
Just some thoughts about safety when we talk about MEK or acetone,
By the way acetone is in finger nail polish remover,
Ken
Ken Ehrenhofer is offline   Reply With Quote
Old 07-23-2010, 03:35 PM   #12
Brentwood Bob
Senior Member
 
Join Date: May 2010
Location: brentwood, ca
Posts: 2,808
Default Re: Black stuff in gas tank

On removal of the intake and exhaust a permatex like buildup is in the intake, and the interior of the carb throat. Lacquer thinner cut it with a 1 hour soak, and some scrubbing. Looks like this will be a fun project.
Brentwood Bob is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 02:20 PM.