Can you show a pic of what you are calling "no excessive oil in intake pipes"? there really shouldn't be any oil. Sure, turbo motors generally consume oil but not anywhere close to the volume you are suggesting in an earlier post.
The oil consumption is so small normally that you wouldn't notice a difference in the level on the dipstick or when you change the oil.
Assuming you pulled the head for the valve stem job, it can't be the head gasket as you installed a new one. ( I hope! lolol)
gotta be the turbo.
Hey,
I don't have a picture at the moment, but all the turbo cars i have had have had some level of oil within the charge pipes as the vent pipes are plumbed into the intake, therefore on boost you will get blowby.
There isnt a pool of oil, but if you rub your finger on the side of the pipe it is a tiny bit oily.
The head was not removed to do the stem seals, air can be pushed into the cylinder to bring the valve up and remove the spring, seal etc.
Whilst reading this, also consider that im only seeing oil in cylinders 2 and 3, if it was from the intake direction i would expect to see oil in all not just the middle 2 banks.
I have a theory, I believe that due to freeflow cat and larger IC that i have increased a pre existing issue as both of these things would increase vacuum. When fitting the stock exhaust and IC i do not see the smoke.
Completing some analysis on instances i have found on the internet of people complaining of high oil consumption, it seems that there is an extremely high percentage of 1.4tsi owners that have oil consumption issues. I believe they are probably having the same issues as me but are not seeing the smoke as they have the stock exhaust installed and cat is cleaning/retaining a little until they go onto hard throttle.
When people have been experiencing high oil issues VAG have been replacing the engine, just before VAG decided to discontinue the engine they made a revised bottom end, block, pistons, PCV and vent hoses, the remained of the old parts are refitted to the new block. This whole revised crated engine comes in the form of the engine code "CTHE" i believe.
VAG have also been fitting the revised PCV and vent parts to the older engines to reduce vacuum and in turn the oil consumption a little, but i believe this is VAG's attempt to mask the real issue which i'm coming onto.
A couple other things which seem to reduce oil consumption is using 5/40 instead of 5/30 oil and people that make more use of manual mode on the DSG, which i have tested and yes if you keep the car in manual mode you are typically not using between 1-2k RPM much.... result no smoke. The fact i get no smoke is probably closely related to why people are using less oil with this method.
So it seems there is a mix up of things that are potentially causing oil to get past the pistons, there have been discoveries that the crank bearings cause a lot of vibration on the crank feeding through to rods and over time causing the rings to wear unevenly on the bore due to very slight movement. VAG have also created revised pistons and rings for the older engine too as the rings were wearing down very quickly, so i assume they have used a harder ring. There have also been suggestions that the older pistons are very slightly too small for the engine too, so with this combination of issues.......
I have found 2 instances of people in the same situation of me who managed to fix their engine from smoking.
The stock cylinders are 76.5mm so replacing them again with 76.5mm is probably not a good idea if we consider the above issues, as the bore may have slightly worn a little over time.
Both Wossner and CP manufacture slightly over size pistons to 77mm, so i'm going with the 77mm pistons and having the work done on my head to hone them in for a snug fit!
So this is the route i'm now taking and if this does not resolve the issue, then i will be issuing everyone an interesting bonfire invitation lol
