Fuel Filter Leak

[Steveenduro]

Hi All.

Just done a fuel filter change on a mk2 Tdi, and I'm leaking diesel onto the top of the filter cannister. I think it must be from the plastic insert where the O ring/s are.

I only found one O ring on dismantling. Are there meant to be two of them?

Thanks

[adrianf.]

I changed my filter a few months ago and im sure there was only one O ring

Are you 100% sure it didnt fall out when you put the pipe back onto the filter?

Edited May 10, 2007 by adrianf

[Steveenduro]

Yes, it was in place. That will teach me not to replace it.

[tim-spam]

There are 2 'O' rings - one blue and one black.

 

Another possibility is the joint between the fuel hose and the rear connection to the tee-piece. If the spanner monkeys have installed the filter such that this section of hose is pulled too tightly, the rear pipe section of the tee-piece can develop a permanent bend, causing a slight leak. If this is the case, you will need a new tee-piece.