Hello, after fixing an oil leak coming from the rear main seal popping out I now have huge amounts of oil coming up through the vent pipe from the oil filler neck to the intake tube (2007 RX-8). I imagine this can only be caused by a lot of blow-by, however the engine runs perfectly all the way up and starts perfectly which seems to be uncharacteristic of a tired side seal. Is there anything else this could be? I don't believe the PCV system at the top of the oil filler neck is an issue as there is suction through the pipe. Next step is to get a compression test but thought it was worth checking here for any other ideas as the perfect running engine seems odd to me. Thanks

 

Damn no one..?
Anyways what happened any updates..?

 

It was indeed a snapped side seal, ended up doing a full rebuild now works like a charm.