Sidicer
Member
Hello, sorry for creating even ANOTHER thread about oil consumption, but I didn't see any topics about oil consumption above 1L/500km and I have a bit of a bigger problem. 
Maybe one of you guys could point me the right direction
Backstory of my car is very long so I'll just say that I had my head restored (new valves, new valve seals, cleaned, well.. everything) and it's been done together with another (new) timing chain kit change.
But.. Doing this 1k€ work did not fix one problem: MASSIVE oil consumption. I have a leaky rear main seal, but it seldom drips on the ground with small dots, so I don't think that 1L/60km of oil would be from rear main seal. While changing the timing chain we checked the front main seal and it looked like new, no leaks, no nothing.
My and my dads thoughts are that maybe the Valve Seals have "popped off(?)"/were not placed correctly and they're spewing oil like crazy? The spark plugs are oily and shining a flashlight into the cylinder you can see oil puddles on top of the pistons. We had pistons also removed while we waited for the head to be done and oil rings were not stuck and looked pretty good, the cylinders were not "scared" or elipsed.
Where could a Z22SE pour such amounts of oil ? Antifreeze is not rising, after 500km it looks just as it looked when we topped it off.
In these 500kms of test-driving I've put in 6-7L of oil.
When the car is stationary - no oil has leaked. I've left the car parked near the shop for a week and today the oil level is the same as it was when I left the car.
It's an Astra G Coupe with Z22SE engine.
Could the head be the problem and should we take the head back to the shop that done it ? Or how else could I trace back the oil problem?
Also can I stuck/clogged "PCV" system create bottom pressure and suck up oil and push to the combustion part of the engine?
Thank you for any replies.
Maybe one of you guys could point me the right direction
Backstory of my car is very long so I'll just say that I had my head restored (new valves, new valve seals, cleaned, well.. everything) and it's been done together with another (new) timing chain kit change.
But.. Doing this 1k€ work did not fix one problem: MASSIVE oil consumption. I have a leaky rear main seal, but it seldom drips on the ground with small dots, so I don't think that 1L/60km of oil would be from rear main seal. While changing the timing chain we checked the front main seal and it looked like new, no leaks, no nothing.
My and my dads thoughts are that maybe the Valve Seals have "popped off(?)"/were not placed correctly and they're spewing oil like crazy? The spark plugs are oily and shining a flashlight into the cylinder you can see oil puddles on top of the pistons. We had pistons also removed while we waited for the head to be done and oil rings were not stuck and looked pretty good, the cylinders were not "scared" or elipsed.
Where could a Z22SE pour such amounts of oil ? Antifreeze is not rising, after 500km it looks just as it looked when we topped it off.
In these 500kms of test-driving I've put in 6-7L of oil.
When the car is stationary - no oil has leaked. I've left the car parked near the shop for a week and today the oil level is the same as it was when I left the car.
It's an Astra G Coupe with Z22SE engine.
Could the head be the problem and should we take the head back to the shop that done it ? Or how else could I trace back the oil problem?
Also can I stuck/clogged "PCV" system create bottom pressure and suck up oil and push to the combustion part of the engine?
Thank you for any replies.
