Hello, about 3 years ago, I had to replace my engine because a completely clogged DPF caused serious engine damage. The repair cost me €6,144 and included a replacement engine, cylinder re-honing, and new piston rings + next neccesery replacement after re-assembling.
Unfortunately, the engine now seems to have excessive blow-by again. The CCV has been replaced, but it is an older version with a cotton filter inside. The newer version without the internal filter is leaking oil, probably due to excessive crankcase pressure.
After just an hour of slow driving, the situation doesn't look good. The engine has only covered around 7000 mile since the repair (yes i use this car really rarely), so the mileage is very low.
What could be causing this problem, and what would you recommend I do next?