Smoke from engine

[honda900rr]

Hi I have a 2002 wrx and I have just started  getting  a smell  of  oil in the car and when I stop I can see a little  bit  of  smoke  coming  from the bonnet  I had a quick  look  and it looks  like it's  dripping  oil from somewhere  onto  the manifold  in front of  the  turbo  can anyone  give  me  clues  please 

[savage bulldogs]

It will probably be the drivers side rocker cover and half moons . They're prone to getting brittle due to the heat cycles caused by the turbo and up pipe

 

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[honda900rr]

Thanks  I will  have  a  look