What's in the workshop this week, Pelikanblau edition

[Mechcanico Lee]

Some good theory’s on the oil consumption , I like the thoughts .

Some of the petrol Vauxhall’s have a pcv unit inside the rocker cover with a take off pipe that comes directly from inlet manifold ( quite a big bore pipe )

This internal pcv valve in the rocker cover fails and on overrun and light throttle loads where manifold vacuum is high it pulls the oil into the manifold and the oil gets burned that way .

There’s a few engines that suffer with high oil consumption that are pcv issues , tell tale is oil filler cap gets sucked on with some vigour or dipstick gets sucked in if you pull it out a touch . The bmw valvetronic suffers with high oil consumption, that has pcv issues

Some of these issues support the ‘ only uses oil at lower revs ‘ lower revs less throttle openings = higher manifold vacuums , more chance of oil getting pulled into pcv .

I’ve never seen this but heard that on some engines where the oil scraper rings are on the piston ,the oil drillings or micro slot passsages through the piston ring landings can get carbonised up so the oil control rings cannot do there job of scraping the excess oil away .

Would of been a good diagnostic lesson to strip that engine Mikki jane to have a look just for the knowledge gains .

Good post carry on with the good work