All,

The sleuthing has been enlightening to read. looking closer I see that the fuel is trailing down from somewhere higher than I originally notated with the video. After putting some light down between IP and engine block, I do see fuel all along this side of IP as well, but no noticeable point of weep, (more like how rocks in a small stream's bed will shimmer with water running across yet show no real indication of movement.)


Seems like Sixto's idea is it?

"Fuel might be leaking from the relief fitting on the block side of the IP and dribbling down the IP case below the governor."

Or is compress ignite's hypothesis about the emergency fuel shut off seal leaking valid?

Also, I seem to remember seeing more fuel accumulate around the furthest back of the 5 injector output lines, from the bottom though, where the little locked gear things are ( forgive my horrible naming) So it could be the injector lines where they connect to the top of the pump?

Where is this relief fitting on the block side of the IP? easy to change seal?


First things first though, I will clean everything up very thoroughly and then look around at great length. I've been needing to familiarize myself with the IP anyway. Anyone have a diagram, or link to one, for the pump w, inputs/outputs and seal/o-ring locations? I am a very hands on, visual learner and seeing it deconstructed with the flow of fuel & oil would be invaluable. the path fuel takes through every connection still jumbles my brain when I can't see every component in front of me. The things I fix at work are much more compact systems.

Is it really a quiet idle? that's it's normal when its up to operating temp, definitely more clatter when cold though. Engine is still young & well cared for (i would like to think)

Thank you all, again, and I hope this will narrow down the drips' origin. I will post copious pictures as my results.

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1993 300D 2.5T 74k RIP
1998 E300TD 210k