Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help




Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 01-07-2005, 12:36 PM
Registered User
 
Join Date: Apr 2004
Location: CC, TX
Posts: 771
Exclamation flush fuel tank in car?

Can you flush & clean the fuel tank while it's still in the car? I've been having an algae or fungus problem and just had a lot of water & coolant mixed into the fuel as well.

I'd rather avoid the hassle of pulling the tank. Especially since I will have to remove the trailer hitch too, which is hassle too.

I removed both fuel lines and pulled the tank strainer.

I then flushed the tank with about 2-3 gallons of RUG into the filler neck and out into a bucket under the strainer hole. Which I hope removed99.9% of the water.

Then I capped the two fuel lines and installed the strainer.

Filled the tank with RUG and BioBor and will let it sit a couple days. Which I hope will kill any fungus or algae that may be in the tank.

I plan to drain the tank a couple days later and flush some more RUG through it to rise out any dead algae & fungus. Then put it all back together.

Will a full tank of RUG wipe out any fungus & algae?
__________________
1987 300TDT
1981 VW MKI Caddy 1.6 diesel, waiting on engine swap
1983 D-50 Power Ram 4x4 "Mitsubishi" 2.3 turbo diesel
assorted gas powered crap and motorcycles

RIP: 1984 300TDT, 1982 300TDT, 1984 190D 2.2, 1992 300D 2.5, 1987 300TDT, 1982 Maxima LD28, 1983 Maxima LD28, Isuzu C223 P'ups X3, 1983 Holiday Rambler 6.2 Banks turbo diesel, 1984 Winnebago LeSharo 2.1 TD, 1985 Allegro 6.5
Reply With Quote
  #2  
Old 01-07-2005, 12:45 PM
boneheaddoctor's Avatar
Senior Benz fanatic
 
Join Date: May 2004
Location: Hells half acre (Great Falls, Virginia)
Posts: 16,007
Quote:
Originally Posted by odie
Can you flush & clean the fuel tank while it's still in the car? I've been having an algae or fungus problem and just had a lot of water & coolant mixed into the fuel as well.

I'd rather avoid the hassle of pulling the tank. Especially since I will have to remove the trailer hitch too, which is hassle too.

I removed both fuel lines and pulled the tank strainer.

I then flushed the tank with about 2-3 gallons of RUG into the filler neck and out into a bucket under the strainer hole. Which I hope removed99.9% of the water.

Then I capped the two fuel lines and installed the strainer.

Filled the tank with RUG and BioBor and will let it sit a couple days. Which I hope will kill any fungus or algae that may be in the tank.

I plan to drain the tank a couple days later and flush some more RUG through it to rise out any dead algae & fungus. Then put it all back together.

Will a full tank of RUG wipe out any fungus & algae?
Don't think the RUG will on its own.....But Biobor will do it......I would go at at least twice what is shock concentrations....maybe 4 times since you are leaving it there ony a few days.

Did you put a few cans of dri-gas in with the RUG to absorb moisture?
__________________
Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
---------------------
Section 609 MVAC Certified
---------------------
"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche
Reply With Quote
  #3  
Old 01-07-2005, 01:34 PM
Registered User
 
Join Date: Sep 2001
Location: central Texas
Posts: 17,277
Are YOUR TD's Wagons ? Some people use TD meaning other things...
If yours are wagons I don't know if you can effectively flush them in situ.
However, If you have a sedan I suggest that power flushing is completely acceptable way to really clean them out. I took my 240 tank out... but would not do that again because the large holes in the tank and the upright placement makes power washing and evacuation very straightforward....and easier than dealing with the very tight rubber interference gasket at the bottom.
If the only thing you are trying to do is kill algae.. you can do that in the tank with Biobar ... I did this ... and use a clear 90 degree filter up front.. and it only took one treatment per 6-9 months to keep me clear.
Reply With Quote
  #4  
Old 01-07-2005, 03:42 PM
Registered User
 
Join Date: Apr 2004
Location: CC, TX
Posts: 771
the TD is a wagon.

I figure the RUG is not as nice to fungi & algae as diesel might be.

Plus I think RUG might be a lot harsher on whatever might be stuck to the walls of the tank and break it down better.

I added about 1oz BioBor, supposedly "shock" concentration for 40 gallons, the tank is only 18ish gallons I think.

Diesel always felt "greasy" to me and seems to hold water better. The RUG will probably rinse & flush out the tank better.

When I'm done I'll settle the water and crap out of the RUG and burn it in the lawn mower or other vehicles.

But it's all just one big continuous experiment.
__________________
1987 300TDT
1981 VW MKI Caddy 1.6 diesel, waiting on engine swap
1983 D-50 Power Ram 4x4 "Mitsubishi" 2.3 turbo diesel
assorted gas powered crap and motorcycles

RIP: 1984 300TDT, 1982 300TDT, 1984 190D 2.2, 1992 300D 2.5, 1987 300TDT, 1982 Maxima LD28, 1983 Maxima LD28, Isuzu C223 P'ups X3, 1983 Holiday Rambler 6.2 Banks turbo diesel, 1984 Winnebago LeSharo 2.1 TD, 1985 Allegro 6.5
Reply With Quote
  #5  
Old 01-07-2005, 03:47 PM
boneheaddoctor's Avatar
Senior Benz fanatic
 
Join Date: May 2004
Location: Hells half acre (Great Falls, Virginia)
Posts: 16,007
Gassolene won't absorb water.....thats why I asked if you put some dri-gas into it....to soak up the water.
__________________
Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
---------------------
Section 609 MVAC Certified
---------------------
"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche
Reply With Quote
  #6  
Old 01-07-2005, 04:06 PM
Registered User
 
Join Date: Sep 2001
Location: central Texas
Posts: 17,277
Alcohol is used in gas cars to combine with the water, and then evaporate... I don't know if it will work with diesel..
Reply With Quote
  #7  
Old 01-07-2005, 04:07 PM
boneheaddoctor's Avatar
Senior Benz fanatic
 
Join Date: May 2004
Location: Hells half acre (Great Falls, Virginia)
Posts: 16,007
Quote:
Originally Posted by leathermang
Alcohol is used in gas cars to combine with the water, and then evaporate... I don't know if it will work with diesel..
He was using RUG.....Regular Unleaded Gasolene...............

not a great idea with diesel as I understand.....the dri-gas (alcohol) I mean
__________________
Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
---------------------
Section 609 MVAC Certified
---------------------
"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche

Last edited by boneheaddoctor; 01-07-2005 at 05:30 PM.
Reply With Quote
  #8  
Old 01-07-2005, 05:15 PM
Registered User
 
Join Date: Apr 2001
Location: So. California
Posts: 744
I was wondering what RUG was and just about to post this question:

Berber or shag?
__________________
84 300DT Puke Yellow. Totalled after 438,000
84 300DT Orient Red. 169,000 (actual mileage may vary)
2002 Explorer EB (wife's)
Reply With Quote
  #9  
Old 01-07-2005, 05:27 PM
Registered User
 
Join Date: Apr 2004
Location: CC, TX
Posts: 771
well I intend to fully drain all the RUG before hooking up the fuel lines again.

I will definitely have to get some of that anti water stuff and add to the RUG while it's in the tank. I have a little fuel pump I can hook up to it and circulate the RUG in the tank. That should mix the stuff real good and absorb any water that is left.

What's the best stuff to use? A lot of the fuel "treatments" are nothing more than mineral spirits, nathpa, tolene, etc. All which can be bought at Home Depot for a few buck a gallon, not the little 12oz bottle Autozone wants to sell you.
__________________
1987 300TDT
1981 VW MKI Caddy 1.6 diesel, waiting on engine swap
1983 D-50 Power Ram 4x4 "Mitsubishi" 2.3 turbo diesel
assorted gas powered crap and motorcycles

RIP: 1984 300TDT, 1982 300TDT, 1984 190D 2.2, 1992 300D 2.5, 1987 300TDT, 1982 Maxima LD28, 1983 Maxima LD28, Isuzu C223 P'ups X3, 1983 Holiday Rambler 6.2 Banks turbo diesel, 1984 Winnebago LeSharo 2.1 TD, 1985 Allegro 6.5
Reply With Quote
  #10  
Old 01-07-2005, 05:32 PM
boneheaddoctor's Avatar
Senior Benz fanatic
 
Join Date: May 2004
Location: Hells half acre (Great Falls, Virginia)
Posts: 16,007
Quote:
Originally Posted by odie
well I intend to fully drain all the RUG before hooking up the fuel lines again.

I will definitely have to get some of that anti water stuff and add to the RUG while it's in the tank. I have a little fuel pump I can hook up to it and circulate the RUG in the tank. That should mix the stuff real good and absorb any water that is left.

What's the best stuff to use? A lot of the fuel "treatments" are nothing more than mineral spirits, nathpa, tolene, etc. All which can be bought at Home Depot for a few buck a gallon, not the little 12oz bottle Autozone wants to sell you.
Dri-gas is just alcohol.......preferibly with as little water as possible.
__________________
Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
---------------------
Section 609 MVAC Certified
---------------------
"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche
Reply With Quote
  #11  
Old 01-07-2005, 06:54 PM
phidauex's Avatar
BioDiesel Hopeful
 
Join Date: Oct 2004
Location: St. Louis, MO
Posts: 806
Denatured alcohol from the hardware store will work fine. It is very hydroscopic, so it will absorb moisture (which is also why you want to keep that stuff tightly capped). A gallon should cost you 7-9$, and will last quite a while. Good stuff to have around. In anything newer than a 617 you do NOT want any alcohol getting into the fuel, since the moisture will turn into steam inside the newer IPs (which are somehow different from the older ones, in a way I don't fully understand), and cause all sorts of havok.

But for flushing the tank on a 617, you should be just fine.

peace,
sam
__________________
"That f***in' biodiesel is makin' me hungry."

1982 300TD Astral Silver w/ 250k (BIO BNZ)
2001 Aprilia SR50 Corsa Red w/ 5.5k (>100 MPG)

Reply With Quote
  #12  
Old 01-10-2005, 12:04 PM
Registered User
 
Join Date: Apr 2004
Location: CC, TX
Posts: 771
Finnished flushing.

I filled tank with gas and HEET drier Friday. Drained it Sunday.

Flushed a few gallons back though the tank and into a bucket under the drain hole. About a quart of water and algae came out.

I poured off the top, the water & junk stayed in the bottom of the bucket. Kept flushing through about 20-30 times. I got lots of water out of the tank. evne after I total drained the tank before starting the whole process.

The water seperated from gas pretty good so it was easy to run it through again and again.

put it all back together and filled with diesel, BioBor and Diesel Clean. It runs OK but idles a little rough. I guess it will take a little time for the last bit's of water to get purged out of the entire system. The diesel clean is supposed to help remove the water. I guess it just absorbes any moisture and lets the engine burn it.
__________________
1987 300TDT
1981 VW MKI Caddy 1.6 diesel, waiting on engine swap
1983 D-50 Power Ram 4x4 "Mitsubishi" 2.3 turbo diesel
assorted gas powered crap and motorcycles

RIP: 1984 300TDT, 1982 300TDT, 1984 190D 2.2, 1992 300D 2.5, 1987 300TDT, 1982 Maxima LD28, 1983 Maxima LD28, Isuzu C223 P'ups X3, 1983 Holiday Rambler 6.2 Banks turbo diesel, 1984 Winnebago LeSharo 2.1 TD, 1985 Allegro 6.5
Reply With Quote
  #13  
Old 01-10-2005, 12:26 PM
Senior Member
 
Join Date: Jun 2001
Location: Northern Calif. (Fairfield Area)
Posts: 2,225
I'm still trying to figure out how you got engine coolant in your fuel tank.

It sounds like you are going overboard on the cleaning process. You've done enough. I'd just put fuel and a little biobor in and as someone suggested, use the clear filters so you can keep an eye on things. I don't understand why they even make the opaque ones. If you get fungus again at a later date, kill it with biobor and change the filters. Also if you don't drive the car much, keep the tank topped off. What happens and particularly in humid climates is moist air condenses as the tank cools from the warmer day. What happens on the inside of your big old windshield is what happens in your tank.

Peter
__________________
Auto Zentral Ltd.
Reply With Quote
  #14  
Old 01-10-2005, 01:33 PM
Registered User
 
Join Date: Apr 2004
Location: CC, TX
Posts: 771
OOPS...I guess I didn't explain the water part...

I had a HIH set up for heating my WVO blend. But I used regular Polyethelene hose and it melted. Thats how water & coolant got into the fuel system.

I've been experimenting with PEX but that gets soft at high radiator temps too so I think I will use copper for my next HIH fuel line.
__________________
1987 300TDT
1981 VW MKI Caddy 1.6 diesel, waiting on engine swap
1983 D-50 Power Ram 4x4 "Mitsubishi" 2.3 turbo diesel
assorted gas powered crap and motorcycles

RIP: 1984 300TDT, 1982 300TDT, 1984 190D 2.2, 1992 300D 2.5, 1987 300TDT, 1982 Maxima LD28, 1983 Maxima LD28, Isuzu C223 P'ups X3, 1983 Holiday Rambler 6.2 Banks turbo diesel, 1984 Winnebago LeSharo 2.1 TD, 1985 Allegro 6.5
Reply With Quote
  #15  
Old 01-10-2005, 01:38 PM
Senior Member
 
Join Date: Jun 2001
Location: Northern Calif. (Fairfield Area)
Posts: 2,225
You might just try switching to a veggie therm.

Peter
__________________
Auto Zentral Ltd.
Reply With Quote
Reply

Bookmarks

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 04:32 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page