Hello. 

 

I've noticed that I have oil pooling on top of my rocker cover. It seems to originate from the pipe connection behind the coil pack for cylinder 1 (marked in blue) but I have also noticed that the breather connection for my PCV valve (marked in red) is covered in oil as well. Furthermore this morning I had a misfire and codes P2301 and P0301 indicating a misfire from cylinder 1. I swapped coil packs 1 and 2 over, cleared the codes and went for a test drive and the fault didn't show up again in either cylinder 1 or cylinder 2. The pipe marked in blue appears to go to the oil cooler at the front of the block and then down towards the turbo but I can't find a schematic showing this pipe. Has anyone experienced similar? I'n guessing I need to change the PCV valve but I'm also assuming that once an oil seal has been compromised it will need to be changed as well?

I think this parts diagram relates to you motor ...

Oil build up on the turbo intake tract is not uncommon.  I had it quite noticeably when I bought mine in 2016.  I cleaned it and it came back. I was also getting quite a lot of oil discharge from the underside of the turbo. I posted a detailed thread and detailed photos.  In the end the thing that appears to have cleaned that all up was indeed a new fine oil separator / pcv. 

 

Also, it is not entirely uncommon to need to add some oil to the CCZA. If that is done without care, it will spill in the rubber funnel around the oil cap and if not removed will either spill over the top down onto the rocker cover or seep down onto the rocker cover. It that happens a few times or one careless oil top up it will deposit oil on the rocker cover with no where to go.  I'd have a good look round for any other evidence of source then thoroughly clean it up.

 

I'm not sure about that pipe you refer to. It looks black plastic or rubber, which would eliminate an oil line.  It is not shown on the schematic for the turbo feeds and return. See link below, my guess is either vacuum or coolant. I've also attached the coolant schematic see if anything looks familiar.

 

Are you sure it actually interconnects into an oil cooler? If so, transmission oil cooler or engine?

 

https://skoda.7zap.com/en/cz/octavia/oct/2010-663/1/145-145075/

 

https://skoda.7zap.com/en/cz/octavia/oct/2010-663/1/121-121027/

 

 

So I've turned my hand to a bit of intake valve cleaning. I can confirm the line you refer to in blue is a vacuum line between turbo and intake manifold.  It may be an equalisation or pressure relief or just vacuum but defn not fuel or oil.