My engine was running fine left it for 3 months put a turbo now it smokes when it's warm, hesitates and has oil on the first plug only.there is no oil in intake or intercooler so I Doubt it's the turbo. Has anybody had toubles head leaking oil into cylinder? I've had plenty leak water into cylinder and oil passage is right next to number one or is that a return?it only does this warm and loses oil pressure when smoking? Thanxs for any help Cheers

A compression test will tell you if its valve guides or rings on cyl 1 , As for loss of oil pressure and smoking could be leaking out exhaust side of turbo ?? Was it new ?? Any shaft play ??

Turbo didn't smoke on the skyline but I'm not running a restrictor? Will put extractors back on tomorrow and check for smoke. I ran 15.1 with wheel spin with this motor three months ago with no smoke and the only thing I have changed is the rocker cover and added the turbo. No1 plug has some serious oil after hot run and inspection cam shows oil in the cylinder but no raw oil in exhaust

Do you have a catch can? How's it hooked up. I put a temp one made from a coke bottle and put the 2 hoses from the rocker cover in to it and poked a hole in the side so it could breath. Turned out the hole I poked in it was to small and the engine couldn't breath and it use to blow blue smoke.

Yeah I have a catch can two roker cover vents t pieced in and PVC and breather before turbo out. I checked compression and they were all within 2psi of each other. I went to enzed today and payed $20 for them to make me a 1mm restricted banjo eased it a little then emptied cleaned and baffled me catch can cleaned pcv all fixed. Cheers fellas