How do you flush a diesel tank - Defender Source
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  #1  
Old November 18th, 2004, 01:04 AM
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How do you flush a diesel tank

Hi,

I am having problem with my 300TDI. I was told to replace the fuel filter and then flush the tank. Is it a job that I can do it myself or I need to take it to a shop. Is the shop has to be specialized in diesel? Thanks.
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Old November 18th, 2004, 09:15 AM
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Is it a side mounted tank? If so, just drop it and pour out the contents. Then put some fress diesel in it and swirl it around to clean it out good. Then you can reinstal the tank. The tank is very easy to remove.
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Old November 18th, 2004, 11:05 AM
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If its really bad you can take it out and have it hot-tanked to clean it all out.
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Old November 18th, 2004, 01:23 PM
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Guys, Thanks for the info. It is much appreciated. I guess I need to go under the truck to see if it is side mounted. It is a D130 and I got it about 2 months ago, so I am still pretty new at it.

Jim, what is hot-tanked mean?
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Old November 18th, 2004, 02:32 PM
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Usually contamination is in the form of water, which will seperate to the bottom of the tank if let to sit.

So if you see water come out when you start to drain you know your issue.

Ron
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Old November 18th, 2004, 02:44 PM
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d130 probably has a tank mounted futher back than the seatbox since there is so much extra frame. Some d90's have them right under the seat box.

Some full-service radiator shops will immerse your fuel-tank in a hot caustic solution which cleans it all out. They'll usually repaint it and you've got a nice re-done tank. Here is a place I've used for heater cores, but they do a lot more.

http://www.kingradiator.com/

Naturally they are in NC, but its easy to see what sort of establishment you are looking for. If you try to find someone that caters to the hot-rod or custom community and you'll be on the right track. There should be lots of similar shops in so cal.
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Old November 18th, 2004, 04:38 PM
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You'll have a rear mounted tank, 18 imperial gallons. So either run the fuel down low or have a good few jerry cans to hand.
What was the problem initially?
Did it go away when the filter was changed?
If it's water in the fuel you'll need to drain the filter regularly until all the water is cleared.
Bosch injector pumps don't like water going through them at all.
I know I've suffered one very expensive pump rebuild due to water getting in the fuel, it trashed the pump internals completely.
If it's showing any signs of rusting particularly if it's double skinned(skid plated) just get a new tank.
I 've taken to adding a fuel addative claimed to dry the fuel by forcing any water to mix totally with the fuel. It's called Wynns Dry Fuel if I remember correctly.
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Old November 18th, 2004, 07:30 PM
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Well, when I first received the D130, it was running fine around town. One day, I took it on a long drive about 100 miles. First 60 miles was great but after that, the engine started to loss power doesn't matter how hard you push on the gas paddle then the engine just die on the freeway. Once I got it started, it won't go over 40 mph and from time to time, the engine will smoke and puff real bad. I finally got it home by driving in 3rd gear at about 35-45mph. I changed the filter and it's still doing the same thing and I don't dare to take it on the freeway and the engine will also die at the stoplight from time to time.
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Old November 19th, 2004, 05:48 PM
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That sounds exactly like my symptoms See MY 90 Died. Turned out to be an ari leak in the suction side of the fuel pipes
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