Shouldnt happen surely. Is your engine factory spec or even mildly modified ?
You said earlier you are using thinner than recommended oil, 0W-30, and Portugal isnt really cold.

 

I have removed the hose (pipe or duct) between the air filter box and the turbo of my corsa and there were a few drops of oil clearly visible on the intake port of the turbo. I have done the same just a few days ago and again there was oil present. I drive both my cars the same way but i have never noticed oil in the intake of my other car. There are no doubts in my mind there is a lot of blowby happening in the Corsa.

 

Shouldnt happen surely. Is your engine factory spec or even mildly modified ?
You said earlier you are using thinner than recommended oil, 0W-30, and Portugal isnt really cold.

Well it could be that but my other car has even thinner (0w20) oil in it and not a single drop in sight, even after 124.000 kms done. I think it is how boosted engines are set so the pressure inside is kept below atmospheric pressure for the piston rings to seal better and protect seals. The Corsa has three breathing hoses exiting the valves cover and all of them are equiped with a valve. Two of them won't let air out, just in and the other one only let air out. I think i understand how the breathing system works but by the looks of it, if too much power is required, there is going to be too much vacuum near the intake side of the turbo and a great amount of oil will be sucked by it. At low to moderate loads, the system might be eficient but at high loads oil will go in.

 

I have be doing some research on the internet about oil catchcans and until now i am not happy with what i have found. The good ones are too expensive and the rest is just awfull bits of junk. The one i like best is for Bmw disi engines but at 175$ i will pass.
So for now i'll just keep an eye on the oil level and go easy on the pedal to minimize blow-by.

 

It was a new subject to me but from the research I have done you are just talking about crank case blowby oil vapour which is, as you say, vented harmlessly into the intake air where it is eventually burned. This is presumably designed into the Corsa engine to comply with EU emission regs. If intake valve stem build up was a problem we would know about it but it will not build up on the moving part.
If your engine were so darned highly tuned that the vapour would rob you of octane then it may be a concern, but you are not. I would forget about this device, and as you are in a hot country go back to GM spec viscosity oil instead of that cold country spec 0W Castrol.
Just my opinion, others are available.

 

I really don't see the need for this on a new engine. Crankcase pressurisation should only be an issue on old engines with worn rings and cylinders. All turbo have some oil in the intake tract, never known one without it. All engines vent crankcase vapours to inlet so they are burnt off.

I fitted an oil catch can to my old Land Rover simply because it is a 50 year old engine and had done 250K miles. Crankcase pressure had got so bad that venting back into inlet was causing it to ignite and cause timing and combustion issues so I vented the oil mist into a can instead of the inlet manifold. It worked temporarily.

I then stripped and rebuilt it last year with all new pistons, rings and bearings along with grinding the bores and since then had no crankcase pressure issues at all.

If your new Corsa engine is suffering excessive crankcase pressure then something is wrong. Mine has done 19K miles now and hasn't got so much as a spec of oil on it, no misting and no excessive crankcase pressure and I would not expect any signs of that for another 100K miles!

 

Hello
Didn´t You know? The 1.0 DISI already has some sort of catch can, in fact, there are two of them and the 1.4 DISI has got them too. They sit a few centimeters just before the turbine, one on the top and the other one on the oposite side.
The valves cover is equipped with three valves to vent nasty vapours, two of them let vapours out and the last one lets air go in but there are only two tubes for the three valves, From what i have read, this is called a dual PCV valve configuration. This system has two sides, one is called dirty and the other one, clean side. The dirty side usually directs vapours to the intake manifold, near the throttle plate for vacuum at low charges but that´s not the case with the Corsa 1.0 DISI. It is situated near the compressor turbine instead. The clean side is cleaner and further away from the turbine and, this is my opinion, it usually vents in not out, when the engine is off and cooling down, but at full charge it changes because vacuum near the turbine is so intense it will open the second PCV valve and venting the crank case will be from there too.
So the dirty side is venting all the time, from low to high loads and clean side will do the same but only when in high loads.
So if this is right, the dirty side is where regular drivers should be worried about because high loads are very rare (that is my case anyway). For more aggressive driving, the clean side might be a concern as well.
Has anyone in this forum, driving a Corsa 1.0 DISI or 1.4 DISI, inspected their turbo intake just before the turbine entry and found oil there? If they have, they know what i am talking about.
Cheers!

 

Er, call me stupid but I bought a new car to avoid having to spend time under the bonnet. I have enough of that with four classic cars. If driven carefully and properly maintained I would not expect to have to worry about any problems for at least 100K miles with my Corsa engine. I find it odd that you are worrying so much about this on a new car. If you are driving so carefully that you get 70mpg average your engine should last years. I doubt there are many people on here who will be inspecting their turbo after just a few thousand miles. You should not need to. :?:

 

Hello
I took a picture of my oily intake. I have been monitoring my oil consumption and so far nothing to be worried about. After 4000 km, the level went about half a decilitre down or less.
The tube with the aluminium shield, on the right side of the picture, is where the oil comes from.

 

It's been a while but it is time to say a few more words about oily intakes. I managed to install an oil catch can and after 1000 Km there was nothing inside, so blow-by from engine is not a concern but oil keeps appearing in tbe tubine side of the turbo so the turbo is leaking oil. Oil consumption is around 0.350 L per 4000 km and that's a lot of oil going into my combustion chambers and the result will be knocking sooner or later, it's just a matter of time.

 

It's been a while but it is time to say a few more words about oily intakes. I managed to install an oil catch can and after 1000 Km there was nothing inside, so blow-by from engine is not a concern but oil keeps appearing in tbe tubine side of the turbo so the turbo is leaking oil. Oil consumption is around 0.350 L per 4000 km and that's a lot of oil going into my combustion chambers and the result will be knocking sooner or later, it's just a matter of time.

My 1.0T are only consumptioning 0,250L in 10000km, which i find really acceptable.
Maybe you should take your car to the dealers garage.

 

I had the same issues with the blow by. I installed an oil catch can and had quite a lot of that stuff inside:

most of that is water. The picture was taken after 800 km.
You can see my full description in the corsa-d forum: http://www.corsa-d.de/index.php?thread/32240-kurbelwellenentl%C3%BCftung-oil-catch-can-etc/&pageNo=1

For my new Corsa E i was too lazy for that OCC Stuff, so i bought a 70 mm 90° Siliconhose in black and replaced the hose at the turbocharger. The vent at the manifold can be closed with a "Norma V2 Quickfit" plug 15mm or in my case with a selfmade alu-plug:

The Blow-by Exit at the engine was connected to a 16mm black hose and conducted to the wing/fender.

 

Do you do a lot of short journeys Link2?
That would explain that amount of water being vaporized from the oil, and catched in the oil catch can.

 

Yes, there are a lot of short journeys!