Superchipmunk

Okey! I’ll try and see if it helps. Maybe with some cleaning additive in the fuel?

Thank you for your long reply :-) Okey, I hear you! I have been driven diesels for 35 years and a happy DIY mechanic, not afraid of projects. My daily driver is a Subaru XV 2012 diesel. Seldom rev it above 3000 rpm, and no problem with smoke or performance. But I do some full pulls now and then, so that might support your theory. Also have an Oldmobile 1982 350 v8 diesel, but that one never get a full pull, and does not smoke.. Some more history on the Nissan. It´s the wifes dailydriver, so it has not been driven hard. Normally cruises down the highway at 70 miles/h. When we bought the car it had about 21000 miles on it and was 3 years old. Does not touch the oil at all. I rarly fill in oil in between the services. Smoke from both oilfillercap and dipstick. I´m absolutley certain that this hasen´t been like this for mstart of ownership.. If your theory is correct, would you say that it´s to late to try an Italian service? Or let me put it like this, would you do it? I think I can organice a compression test, but the leakdown test will take some work as I don´t have the correct tools for the job. What bothers me is that the car has good performace and runs just fine... I appreciate your time! All the best

>Thank your for you´re input Trevor! As the car don´t produce any blue smoke from the exhaust, has good power and starts easy, I´m having hard to belive that the compression is poor. But you never know.. And as the milage isn´t high. But still I would say that it´s brooken in at 86000 miles. I have tried a additive that should give less friction (can´t remember the name), bu no additive for less smoke. I have one thing to try and that is if engine smokes from both dipstick and filler cap. I have understod that I can draw conclutions on the result of that test. Not sure what except that it´s worse if it smokes from both.

Hi everybody! Nissan Qashqai 2017 1,6 diesel, cvt. About 86000 miles So the car starts and runs fine, but I noticed a slight knocking upon coldstart. Almost as if the engine is having trouble building oil pressure. For about 4-5 seconds. And I have crankcase pressure opening the oil fillercap + some smoke. So a Pcv problem I thought. Changed the pcv and the knocking upon starting might have been slightly less. But still crankcase pressure. If I disconnect the hose on the pcv and blow in it, there are not resistance. And I can’t find any defects on other hoses. I notice a sound from the airfilter box, as if the engine is sucking air from a leak in the box. Dismantled everything but can’t find any leak. Some oil in the hoses and around the filler cap, but nothing alarming. Haven’t done a compression test as it’s not a high mileage car. Full service book. Drives 40 + 40 miles everyday. Can’t upload film as it’s to big.. Anyone who has experienced the same problem.