Author Topic: Contaminated Fuel  (Read 285 times)

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Offline 4129R

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Contaminated Fuel
« on: Monday,September 25, 2023, 10:42:47 AM »
I am trying to get one of my TCS started, and it is proving to be a challenge. .

It turns out that by sitting unused for about 3 years, 20 litres of fuel has turned into 20 litres of petrol (gasoline) and 1 litre of water.

Quite how 1 litre of water has got in to the right hand tank only, I have no idea.

Being heavier than petrol, the water sits under the petrol, and if there is enough in the tank to rise above the outlet pipe, the fuel pump sucks up water and pumps it into the carbs.

I have drained both tanks, the fuel pump, the fuel lines and the float chambers in 2 x 40 DCOEs, and put 20 litres of new fuel into the right hand tank, filled the float chambers with the new fuel, and sucked fuel into the fuel pump.

Next challenge, find out why there is no oil pressure registering on the oil pressure gauge. I have filled the oil filter and packed the pump with Vaseline petroleum jelly, but so fr, nothing registering on the gauge.

Offline dakazman

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Re: Contaminated Fuel
« Reply #1 on: Monday,September 25, 2023, 11:09:46 AM »
  Electric or mechanical oil gauge?
     Glad you got your fuel straightened out.
Dakazman

Offline 4129R

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Re: Contaminated Fuel
« Reply #2 on: Monday,September 25, 2023, 01:03:09 PM »
  Electric or mechanical oil gauge?
     Glad you got your fuel straightened out.
Dakazman

Mechanical, i.e. a plastic tube running from the block to the dash gauge.

The gauge has not moved.

Has the plastic tube kinked or become blocked? Who knows. I will connect another gauge with a new tube first, before further investigation of the oil ways to and from the oil pump. 

Offline BDA

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Re: Contaminated Fuel
« Reply #3 on: Monday,September 25, 2023, 02:27:46 PM »
You might try to pressure test the hose/gauge somehow.

Offline dakazman

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Re: Contaminated Fuel
« Reply #4 on: Monday,September 25, 2023, 03:06:08 PM »
  Just put the hose that there in a plastic bottle and crank engine ,  you may want to pull sender and clean out debris.
Dakazman

Offline 4129R

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Re: Contaminated Fuel
« Reply #5 on: Wednesday,September 27, 2023, 01:45:11 AM »
I disconnected the plastic oil pressure pipe from the union on the block by the distributor, removed the union (5/8" spanner), cranked the engine, and oil came out of the block.

New plastic pipe ordered, spare oil pressure gauge on stand-by.

Offline dakazman

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Re: Contaminated Fuel
« Reply #6 on: Wednesday,September 27, 2023, 05:33:06 AM »
Before you run the new line in. Connect it to the sender and the standby gauge. Just crank it a few times as you watch the line or gauge.  Sounds like your getting pressure 😅
Dakazman

Offline Pfreen

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Re: Contaminated Fuel
« Reply #7 on: Wednesday,September 27, 2023, 07:26:53 AM »
This is an FYI.  The top of the original fuel tanks rust because they have a lip at the top which fills with water.  The water fills this area through the screens in the engine cover. The top of the tank eventually rusts through and the water goes into the tank.

This may account for the water you found, not ethanol fuel.

Replacing the tanks with aluminum ones is the only solution I know of.

Offline 4129R

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Re: Contaminated Fuel
« Reply #8 on: Wednesday,September 27, 2023, 08:13:09 AM »
This is an FYI.  The top of the original fuel tanks rust because they have a lip at the top which fills with water.  The water fills this area through the screens in the engine cover. The top of the tank eventually rusts through and the water goes into the tank.

This may account for the water you found, not ethanol fuel.

Replacing the tanks with aluminum ones is the only solution I know of.

I have repaired the tops of several tanks where they have corroded with holes, using liquid metal, as they will not come into contact with liquid petrol.

I will have to check if the right tank top is leaking in any way.

As soon as the correct oil pressure pipe arrives, I will connect it to the block before installing the new pipe in the car.