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 10-14-2021, 08:32 AM   #1
Steve in Tampa
Member
 
Join Date: Jun 2010
Posts: 84
Default gas tank problems

I have a 1930 stock coupe with gas tank rust flakes in the tank that clogs up the fuel line and everything in its path . yes I have an inline filter . I have flush and flushed the tank and every time I do it I get 2 tablespoons of crud.Is there any thing that I could speed up the process with by adding something to it to dissolve the rust . Then I need to seal it . I do not want to take out the tank, it is a restored car maybe 8 years base coat clear coat. HELP Please steve
Steve in Tampa is offline   Reply With Quote
Old 10-14-2021, 09:56 AM   #2
nkaminar
Senior Member
 
nkaminar's Avatar
 
Join Date: Jan 2012
Location: Western North Carolina
Posts: 1,463
Default Re: gas tank problems

I have used Evapo-rust with good results. https://www.evapo-rust.com/
It is not harmful to the environment nor you and will remove all the rust without touching good steel. You can buy it in bulk.

You will have wash out the tank afterwards with water and then let it dry for a few days. Then use one of the sealers available from the vendors. Or from Air Craft Spruce. https://www.aircraftspruce.com/menus...ksealants.html
__________________
A is for apple, green as the sky.
Step on the gas, for tomorrow I die.
Forget the brakes, they really don't work.
The clutch always sticks, and starts with a jerk.
My car grows red hair, and flies through the air.
Driving's a blast, a blast from the past.
nkaminar is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 10-14-2021, 10:49 AM   #3
Chuck Sea/Tac
Senior Member
 
Chuck Sea/Tac's Avatar
 
Join Date: May 2010
Location: Between Seattle & Tacoma
Posts: 2,201
Default Re: gas tank problems

Not sure how you would “distribute” the sealer with the tank on the car?
Chuck Sea/Tac is offline   Reply With Quote
Old 10-14-2021, 10:57 AM   #4
midgetracer
Senior Member
 
midgetracer's Avatar
 
Join Date: May 2010
Location: Bismarck ND
Posts: 1,073
Default Re: gas tank problems

I used Evapo rust in a Model A gas tank and it turned opaque yellow with a bright yellow precipitate. I think it reacted with the Tern coating and dissolved what Tern coating that was left. It did not work on the rust after the yellow change.
midgetracer is offline   Reply With Quote
Old 10-14-2021, 11:21 AM   #5
Dennis Pereira
Senior Member
 
Dennis Pereira's Avatar
 
Join Date: May 2010
Location: Georgetown Divide Kelsey ca
Posts: 848
Default Re: gas tank problems

Do you have a fuel tank screen ? extends up into the bottom of tank .
__________________
Dennis in Kelsey ca
Dennis Pereira is offline   Reply With Quote
Old 10-14-2021, 12:43 PM   #6
Gary WA
Senior Member
 
Gary WA's Avatar
 
Join Date: May 2010
Location: Clinton,WA/Whidbey Island
Posts: 3,513
Default Re: gas tank problems

Sponsored Links (Register now to hide all advertisements)
put in one of these for a while!
Attached Images
File Type: jpg Dirty Leg.jpg (37.4 KB, 60 views)
__________________
www.whidbeymodelaclub.com
Gary WA is offline   Reply With Quote
Old 10-14-2021, 01:34 PM   #7
Steve in Tampa
Member
 
Join Date: Jun 2010
Posts: 84
Default Re: gas tank problems

no screen top or bottom . Poured gas through it 20 times.Blew with air sometimes it would stop up, and I would blow air from the bottom to the top. It seems like there is no end to the crud commin out. steve
Steve in Tampa is offline   Reply With Quote
Old 10-14-2021, 01:45 PM   #8
Oldbluoval
Senior Member
 
Oldbluoval's Avatar
 
Join Date: Jun 2015
Location: Signal Mtn, TN (SE TN)
Posts: 1,530
Default Re: gas tank problems

There’s only one way and it is very painful!
Oldbluoval is offline   Reply With Quote
Old 10-14-2021, 01:50 PM   #9
Steve in Tampa
Member
 
Join Date: Jun 2010
Posts: 84
Default Re: gas tank problems

does this set up keep the crud from going to the carb? does the rust since it is heavy go down to the bottom clean out plug?
Steve in Tampa is offline   Reply With Quote
Old 10-14-2021, 02:27 PM   #10
Chuck Sea/Tac
Senior Member
 
Chuck Sea/Tac's Avatar
 
Join Date: May 2010
Location: Between Seattle & Tacoma
Posts: 2,201
Default Re: gas tank problems

Yes it does. I have a indented firewall(easier to do), and I use the dirty leg plus an inverted pea trap. I get a 1/2” build up in the dirty leg every year. Also every so many years, I re flush the tank. Works good for me.
Just to add: I can run the tank to where the float is sitting on the bottom of the tank and no longer moving.
Chuck Sea/Tac is offline   Reply With Quote
Old 10-14-2021, 02:54 PM   #11
Kevin in NJ
Senior Member
 
Join Date: May 2010
Location: South East NJ
Posts: 3,328
Default Re: gas tank problems

What works and is simple. This is how I fixed my 30 fordor with the same problem.

First you need to flush the tank.

Take the valve off and put a ball cock valve on.

Depending on your own wishes use gas or diesel, a gallon or two, and put it in the tank.

Shake the car. Then drain into a large funnel with a filter or cheese cloth.

Repeat until you see a noticable reduction in crap.

Put a short piece of copper tubing on the end of your original gas valve. This will prevent junk from getting stuck in the valve. You will remove this at a later date.

Yes, I am aware there are filter things. They do not get rid of the problem and you will always never be able to run your tank down.

Make sure the original fire wall filter is in place. I mean it has an original Ford filter screen on it. Not a repro. The Ford screens are built different and work.

Make sure the original filter is in the carb. Again the original screens are built better then the repro.

Drive your car a lot.
I used a glass bowl at the firewall because I could. It got a lot of crap at first. Never did I get anything at the carb filter or in the carb bowl.

Eventually the amount of crap you catch drops off by quite a bit. Then it is time to take the little tube out of the valve.
__________________
Cabriolet and Technical Hints
Kevin in NJ is offline   Reply With Quote
Old 10-14-2021, 02:54 PM   #12
BRENT in 10-uh-C
Senior Member
 
BRENT in 10-uh-C's Avatar
 
Join Date: May 2010
Location: Eastern Tennessee
Posts: 10,480
Default Re: gas tank problems

Quote:
Originally Posted by midgetracer View Post
I used Evapo rust in a Model A gas tank and it turned opaque yellow with a bright yellow precipitate. I think it reacted with the Tern coating and dissolved what Tern coating that was left. It did not work on the rust after the yellow change.
I have received numerous tanks where customers did the same thing at the recommendations of others only to have it fail. The issue is the bacterial will neutralize the rust flakes however it will not dissolve it. Then you have loose flakes that the sealer does not adhere to very well.

Therefore, the only way that you can be assured the sealer will grip to all portions of the tank is to use media to etch the metal giving the sealer a mechanical bond. Even chemical etching acids are hit or miss on creating a good mechanical bond.
__________________
.

BRENT in 10-uh-C
.
www.model-a-ford.com
...(...Finally Updated!! )

.
BRENT in 10-uh-C is offline   Reply With Quote
Old 10-14-2021, 02:55 PM   #13
Ivan in southeast va.
Senior Member
 
Ivan in southeast va.'s Avatar
 
Join Date: Oct 2012
Location: Portsmouth, Virginia
Posts: 143
Default Re: gas tank problems

I would try the dirty leg first. If it doesn't work you WILL have to take the tank out.
Ivan in southeast va. is offline   Reply With Quote
Old 10-14-2021, 03:03 PM   #14
SAJ
Senior Member
 
SAJ's Avatar
 
Join Date: Jul 2010
Location: Auckland, New Zealand
Posts: 478
Default Re: gas tank problems

I washed a very dirty tank out with a pressure washer and lots of detergent after removing the valve and placing a bucket in the car. Then sprayed the inside with meths to absorb the water and blew compressed air in to evaporate the meths. This was an unsealed rusty tank, full of dirt.
No further problems after that and is is 6 or 7 years since I did it.
The tank remained in the car.
SAJ in NZ
SAJ is offline   Reply With Quote
Old 10-14-2021, 04:09 PM   #15
Ivan in southeast va.
Senior Member
 
Ivan in southeast va.'s Avatar
 
Join Date: Oct 2012
Location: Portsmouth, Virginia
Posts: 143
Default Re: gas tank problems

Meths ?
Ivan in southeast va. is offline   Reply With Quote
Old 10-14-2021, 05:33 PM   #16
Werner
Senior Member
 
Werner's Avatar
 
Join Date: Jan 2019
Location: Germany, near Aachen
Posts: 1,028
Default Re: gas tank problems

Hi Steve,

I have (had) a similar problem. My solution is to put some large and roughened brass nuts in the tank. They slide over the ground during the ride and scrape away dirt.

At the same time, I allways drive 60 ml MMO per tank filling. That solves old prisoners. For every 1000 mls I find half a teaspoon of rusty sand powder in the filterbowl/water separator.
__________________
Beste Gruesse aus Deutschland,
Werner


Ford Model A Roadster, 1928
Citroen 11 CV, 1947
Hercules NSU-Wankel Rotary Engine, 1976 (Canadian version)
Werner is offline   Reply With Quote
Old 10-14-2021, 05:34 PM   #17
Synchro909
Senior Member
 
Synchro909's Avatar
 
Join Date: Jun 2014
Location: Melbourne, Australia
Posts: 5,977
Default Re: gas tank problems

Quote:
Originally Posted by Ivan in southeast va. View Post
Meths ?
Methylated Spirits.
__________________
Life is a long lesson in humility
Synchro909 is offline   Reply With Quote
Old 10-14-2021, 05:36 PM   #18
Keith True
Senior Member
 
Keith True's Avatar
 
Join Date: May 2010
Location: Epping N.H.
Posts: 2,602
Default Re: gas tank problems

That tank is never going to get clean while still in the car.Clean enough to use,yes.Clean enough for sealer? No way.I always found the worst of the rust is on the underside of the top.I use the finger screen in the tank,you take the gas valve out and just press it in the opening.Nothing but the screen protrudes into the tank,so you can run it until it is bone dry.That keeps the chunks and flakes out of the valve,that is what scores them.Keep the flushing up,at some point what is loose will come out and what is tight will stay and won't hurt anything.This is a very common thing with A's.Putting the cart before the horse and painting the car before the tank is properly dealt with.
Keith True is offline   Reply With Quote
Old 10-14-2021, 05:57 PM   #19
Steve in Tampa
Member
 
Join Date: Jun 2010
Posts: 84
Default Re: gas tank problems

what type of detergent did you use? did you pressure wash thru the filler cap hole?
Steve in Tampa is offline   Reply With Quote
Old 10-14-2021, 06:54 PM   #20
old ugly
Senior Member
 
old ugly's Avatar
 
Join Date: Aug 2021
Location: alberta canada
Posts: 267
Default Re: gas tank problems

i don't like sealers.
if the tank is not cleaned up properly the sealer will eventually de-laminate, big problem when that happens and i also think the only way to rectify the problem starts with removing the tank.

if removing the tank is an absolute out of the program,
then
keep straining out the rust through the use of a trap, an extension on the tank valve, plus the glass sediment bowl with the correct screens, the carburettor screen and maybe even an after market filter closer to the carb.
old ugly 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 05:01 AM.