Dieselgeek
TDIClub Enthusiast, Vendor , w/Business number
To me at least it does look like your pump head seal is seeping diesel fuel.
I wrote the procedure for replacing the cast iron pump head's o-ring seal yesterday. Runonbeer and I plan on changing a leaky o-ring soon which will allow us to take pictures to add links to the procedure's text. I plan on having the install procedure up on my site in the next few weeks. Based on my very recent experience tinkering with a bench-mounted pump, the in-car procedure should take around one hour to perform.
One nice thing I found was that the cast iron pump head does not have to be removed fully to replace the o-ring seal! This eliminates many possibilities for the job going awry. Also, I think that the green o-rings as supplied by Bosch in the newest complete seal kits are not designed to be stretched over the pump head during install. The Viton o-ring seal I sell does not expand like the green Bosch o-ring so it fits better (perfectly) in the o-ring groove after it is stretched around the pump head.
I wrote the procedure for replacing the cast iron pump head's o-ring seal yesterday. Runonbeer and I plan on changing a leaky o-ring soon which will allow us to take pictures to add links to the procedure's text. I plan on having the install procedure up on my site in the next few weeks. Based on my very recent experience tinkering with a bench-mounted pump, the in-car procedure should take around one hour to perform.
One nice thing I found was that the cast iron pump head does not have to be removed fully to replace the o-ring seal! This eliminates many possibilities for the job going awry. Also, I think that the green o-rings as supplied by Bosch in the newest complete seal kits are not designed to be stretched over the pump head during install. The Viton o-ring seal I sell does not expand like the green Bosch o-ring so it fits better (perfectly) in the o-ring groove after it is stretched around the pump head.
Last edited: