Quote:
Originally Posted by BGM
absolutely no idea, can you exaplin further? any vids on youtube showing the issue?
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There is an a certain amount of steamed oil that is released from the crankcase. Manufacturers are forced to 'recycle' this waste by leading it to the induction again through the pcv valve. Because of the design of the direct injection engines, it is not mixed with gas but only with air before it enters the cylinder to get burnt. But when it contacts the hot intake valves, it leaves a residue that it develops into carbon because of the temprature. The amout of carbon buildup is increasing overtime with car use, causing from efficiency and performance issues to CEL lights and other more complex problems.
Guys do some googling. There is no exception of this rule, every modern turbo engine suffers, from 1.4 tsi golfs, to biturbo BMWs and V8 Audis
I post a link from a mini cooper forum which includes many photos to get an idea:
http://www.northamericanmotoring.com...sus-count.html
Then comes the oil catch cans, where they collect this oily steam and they prevent it from entering the engine again.