Latest Reader Question: Water in Diesel?

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Here’s the latest reader question, along with my reply!

Vernon asks: My 2004 VW Jetta diesel stalled when water in the fuel reached the engine. What is the best procedure for removing the water from the engine and tank?

My reply: Diesel (like ethanol) has a tendency to attract and retain moisture. There are additives you can use to mitigate this problem – and the best way to avoid this problem is to use the freshest-available diesel fuel (as at truck stops, where the fuel is likely to not have been sitting in the storage tanks for a long time).

Water in modern common rail injection diesels is particularly bad news – for the injectors.

Depending on how much water you’ve got in the system, it might be worth draining the tank and purging the lines rather than trying to “run it through.” On the other hand, additives such as Stanadyne – and/or Amsoil’s Diesel Injector Cleaner.

You might ask some of the TDI people on the TDI Forum (here) for their advice as well.

Good luck with this – and please keep us posted!

. . .

Got a question about cars – or anything else? Click on the “ask Eric” link and send ’em in!

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