Not exactly the same, but I learned that coils are oil filled after searching for a persistent oil drip from a van that I had purchased from a wrecking yard years ago. I cleaned the engine a couple of times before noticing a drip of oil on the bottom of the coil, where there was a pinhole leak. Presumably it was created during the accident that put the van in the boneyard.

Angus

> On Oct 3, 2016, at 10:31 AM, Stuart MacMillan <stuartmacm@GMAIL.COM> wrote:
> 
> New Bosch coil, two years old, about 2000 miles on it and dripping oily tar
> with a lump of it built-up on the top.  I'll replace it, but anyone ever
> seen this?
> 
> 
> 
> Stuart