When it rains it pours !! Oil leak from behind the crank pulley

[niks_terrano ii]

Hi guys just noticed oil coming from behind the crank pulley ?

I presume it's a seal of some description ?

Is it easy to replace ?

 

[kitchenman]

Hi Check your rocker gasket.
Check for oil at back of block below head
Wipe it off before a run, check after, that is where mine is/was coming from