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Fuel pump testing and replacement on Audi WR, WX, MB, GV ur-quattros

Parts required:

Testing procedure (WR and MB engines):

Replacement procedure:

While you're struggling with the check valve banjo bolt on the bench, just remember you could have been trying this trick upside down under a car with fuel dripping into your nose, rust dropping into your eyes, and the pump mounting plate in the way. This process loses all of its attraction if you then discover the old hose doesn't fit the new pump.

At least you can have a cold beer on a bench. Some prefer ice-cold Scrumpy Jack in a Thermos-insulated mug - Nature's antidote to the taste of fuel

Do not, under any circumstances, grip the new pump in a vice.

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