Baked diesel

[Pinstripe Shepherd]

I realise that a tiny seep from one fuel injection nut has allowed a shiny tar deposit to build up on my engine block. I should have picked this up earlier but it is dark in there. The deposit is hard and quite difficult to get at. Can anyone recommend a good way to clean it off or should I just paint it? Now I know it is there and have nipped up the nut to stop the seep I don't think any real harm is being done.

[ParaHandy]

Is there Omega 5 (or is it 9 or 3?) in this? If so, open the nut so that you can bake more, not less. I'm told that copious quantities of this vitamin are necessary whilst sailing the western isles.

[sarabande]

Sodde's Law dictates that if you paint the blob over, then the paint will discolour in time. Try using a very light solvent such as lighter fluid or white spirit to soak the blob before applying oleum ginglymus.