2008 Volvo S40 D5 oil/ diesel leak
 

As title says i own a s40 with a strange leak? Really hard to explain but it’s a mess under the engine cover, looks like oil all over rocker cover and in against injector ports.
I did think it was the injector so I removed all 5 cleaned injector and ports and replaced with new seal washer, and also replaced o-ring on top and replaced spill pipe. Still seams to be leaking
Also car drives great upto about 60 then dies as if it’s a truck?
Is it possible that the rocker cover and inlet manifold are separate? Or are they one piece?

Your only option is to clean the engine bay, then drive it and check where the oil appears first.

Is it possible the leak is caused by a worn camshaft o-ring?