if you are looking into the engine and the leak is on your left then have a look at the dipstick tube into the block,check there is no movement there,done a lot of these for leaks,usually remove the tube,give it a good clean and degrease including the block and apply a good sealant and refit,leave for an hour before you try it,used to use the magic metal where you mixed the two compounds together for a good tight fix.
wickham
August 2010