oil seepage from block

[drewesq]

I changed my spark plugs today and found:

a, there is sealant inside that is coming away, and

b, oil on the spark plugs (which is why I think the engine was missing sometimes)



There is also seepage and sealant on the front, looks like the seal nearest the top



After a bit of a google I found this may not be anything to be majorly concerned about as the seal has probably just gone



My question is; how hard would it be to change the duff seal for a new one? I'm not that experienced but have done outer CVs, discs and pads, and now spark plugs... I'm up for a challenge!!



Please discuss!

Drew