We recently bought another Suzuki Swift GTi 1991 model . We got it very cheaply and the owner who had bought it only a few months ago said it had an oil leak. When we investigated we found the oil was dripping out of the air filter.. We replaced the soggy filter with a pod and blocked off the PCV inlet and have the PCV hose running into a home made catch can. It can fill a 1 liter bottle with oil from the PCV in less than 150 klm...LOL... Now normally "blowby" that causes excessive oil/vapors/smoke etc coming out of the PCV but this car has 200lb compression in all 4 cylinders and runs very well and blows hardly any smoke..All the drain holes around the twin overhead cams are clear. The head gasket must be on the right way or it wouldn't be getting oil up there at all. The engine has been rebuilt and is very quiet with no knocks or rattles and sounds very happy. It was going to be used as a track car and has had work done on suspension and brakes and had a brand new Sparco racing harness still in the box in the back. The only other mod visible is the original intake plenum has been replaced with a larger Nissan Silvia we think type which allows for better/more air as well as bigger injectors and fuel rail. The Gtis don't only have a PCV coming from rocker cover, they also have a one way valve/pipe that goes across to the plenum which sucks out of the rocker cover. We have checked the one way valve is working and facing the right way.
So... We have swapped the rocker cover with a different one and checked that the baffle plate at the inside top of the cover wasn't blocked or on the wrong way. Can't for the life of me figure out how it can blow a liter of oil out the top of the rocker cover in a 100klm drive.. If you drive it like an old lady it will only pump 25ml in 100klm.. It seems the accelerator pedal has turned into a 2nd oil pump but not in a good way. The guys in the GTi club can't figure it out either. The 200 psi of compression, smooth quiet powerful engine doing this has them stumped.. Someone said valve guides may be very worn but I would think it would be blowing a LOT of smoke..So what can put that much pressure in a rocker cover ?????? If you take the oil filler cap off ,even at idle there is a lot of air coming out. What else can pressurise the top end soo much..