A few days ago the XC70 started to show blue smoke under load. Also the engine threw a few faultcodes.

The faultcodes were misfires detected on the first cylinder. This is probably caused by a bad coilpack. We changed it and the car is running smooth.

Now the problem with the blue smoke remains. When I check the turbo there is some oil hanging under it. Also when I do the latex glove trick on the dipsticktube it blows some air in the glove. When you rev the engine more air gets pushed into the glove.

We did a compression test on it and that all looks quite good. Also no oil in the coolant or vice versa.

When the engine gets warm some smoke flows from the area where the exhaust manifold sits. Can't really see where it comes from.

The AA guy thought it might be a blown turbo or a blown headgasket.

Can you guys point me in the right direction??

Should I start with cleaning the oil return pipe and the PCV system? What is involved in cleaning the PCV system?