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Old 03-22-2017, 08:35 AM   #1
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Fuel water separator location 2014 Phaeton

I am wondering where the fuel - water separator is on my 2014 Phaeton 42LH. It has the Cummins 450 with the rear radiator. How often should this be checked and/or is there a warning light? Thx for you thoughts.
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Old 03-22-2017, 11:16 AM   #2
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The two fuel filters are next to each other on the passenger side of the engine. The water separation filter will have a wire on it connecting the sensor to the EMS. There is a warning light on your display. I don't know where you are located but if you buy fuel at large volume truck stops, you will most likely never have a problem.

BTW, a good habit to get into is to change your fuel filters and oil annually and your air filter every two years. The engine coalescing filter about every three years. Your air dryer should be checked as well.
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Old 03-22-2017, 03:05 PM   #3
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Thanks for this good information. I've opened the back cover to the engine and all I see is radiator. Do I need to lift the floor in the bathroom to get to the water separators?
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Old 03-23-2017, 09:50 AM   #4
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No, and it is a single water separator. You need to crawl under the coach or put it on a lift. If you have a good diesel mechanic nearby, have him put it on a lift and give you a tour of what is under there.

Even if you had easy access to the top of the engine, you can't get to the filters - they are on the side of the block.
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Old 03-23-2017, 05:35 PM   #5
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Got it! Thanks!��
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Old 03-23-2017, 06:26 PM   #6
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Passenger side on the bottom near where the engine and transmission join. One water separator and one secondary filter.
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Old 03-25-2017, 01:59 PM   #7
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You did not mention if you plan on changing the filter and separator yourself. If you do, the filter takes a 25 mm six point socket, the water separator can be removed with a filter wrench, then the bottom plastic bowl can be removed with a strap wrench. Be aware that fuel will run out all the while you have the filters off unless the fuel tank is lower than 1/4 and the front of the MH is lower than the rear. Even then you may get a fuel bath.
Whatever you do, do not put a pair of vice grips on the fuel line before the separator, you will damage it.
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