So about a month ago my son's 15 turbo started spewing sweet smelling white smoke coupled with a cooling system that wouldn't hold pressure. Checked for exhaust gasses in the coolant and came back clean. Eventually diagnosed failed turbo which was confirmed when I pulled the old one off. Got the new OEM Borg warner installed and car started up fine then popped an oil leak at the oil cooler. Replaced that, which was a tremendous pain in the ass, and now I have the sweet smell of white smoke once again. This time only after the car warms up and north of about 3500rpm. No codes on the obd. I did get some misfire action north of 3500 but it never tripped an engine light, just a pending multi cylinder misfire code.
I'm going to check the exhaust gas in the coolant again but this thing has me a bit confused. I had to pull the valve cover for clearance to get the turbo out and that required pulling the cam phaser valve so I'm wondering if I screwed something up in that process. Only thinking cam phasers since the problem seems rpm dependent.
Any of you Hyundai experts have any suggestions on where to start?