ajm

is this normal for a Japanese vehicle only 2years old in 2014? it seems European automakers consider that less than 75% capacity is not sufficient anymore for automotive use. http://myrenaultzoe.com/index.php/2017/04/renault-optimizes-the-lifecycle-of-its-electric-vehicle-batteries/

it seems some models have timing chain tensioner noise,which leads to failure. A colleague with a E90 had to change 3times every 30000km,fortunately covered by warranty . There was also an issue about scroll tubo failures in early 2000 cars. So check for abnormal noise and unusual timing change replacement history,then you will be good.

naturally the mechanics are saying they did everything right,I was looking for some experts opinion before re-opening the engine again as they suggest. So I should start with the valve seals then? Do you know of any mechanics who have the endoscopic camera to look inside the cylinder without opening the head. I have seen at some workshops in middle east,but not sure if its a reliable method.

yes,the orig. oil cooler is connected to the oil system. Not sure if it is working or not though..

sorry for not clear description. The oil vapors in the blowby gasses coming from tappet cover hose accumulates in the intake air pipe of the turbo inlet,because it's the lowest point in the system. At the moment it's not clear why there is so much oil vapor in the blowby gases and where its coming from,valve seals or piston rings. The oil seperator valve in the tappet cover was replaced,but still problem exists.

@Rumesh88 your method of low idle,high rpm smoke difference is also valid for Diesel, what about Turbo seal problems?

a reputed mechanic in Galle,block sleeves by ESinghe and parts from Dars@na Motors Pchikawatte.I think it's too late to point fingers now,rather trying to find the issue.

Hi Friends, I have a similar problem,but it's a diesel. Engine: Passat Tdi year 2000 some months after the overhaul,there is oil in the intake pipes. Consumption is about 1 litre /1000km s. There is a breather valve in the tappet cover to release crankcase pressure,and it has a hose going to the intake side. The hose mear the turbo is where the oil accumulates,and some drops on the floor if parked overnight. For some time,this connection to intake was removed,and the oil in intake disappeared(no drops in garage floor, but consumption issue still there). So we suspected a problem with the tappet cover valve not isolating the oil vapor from crankcase properly. put a new tappet valve and connected the hose back to intake,no improvement (same amount of oil in intake pipes again) i dont see any excessive white or blue smoke, but occasional black smoke at accelaration (being a diesel,maybe the white smoke is not visible because of black smoke) . will the oil consumption get worse if not treated? Oil catch tanks used in motorsport can help with the oil in intake pipe issue on short term? What about oil additives that claim to stop leaks? any opinion how to trouble shoot for a permanent fix,valve seals or piston rings or turbo seals?