[Hamzyy23]

Hey, guys, this is my first thread, I have a 2007 BMW 335i n54, I bought this car 6 months ago and right after buying it the turbos slowly started to go they were stock turbos, I did have a flame tune on the car just because the turbos were going so I decided to tune it for flames for rollers. I ended up ordering pure 600s and decided to replace them along with some other stuff. Start up was all good although my coolant bleeder screw exploded because I added too much coolant, I ended up replacing the coolant reservoir and temps were all normal until on the first drive oil dropped from max to middle in like 3-4 hours, next day added oil and it didn’t drop after that but would still smoke from the exhaust burning oil smell, at this point I really don't know what exactly went wrong after taking the car over 4500 rpms would give me multiple combustion misfire code it goes on limp mode right away, I'm hoping someone can help me out as I put a lot of money into it and am thinking to give up, valve cover gasket was done a few months ago, oil pan gasket,
The serpentine belt was replaced while changing the turbos, also changed the spark plugs I have the 2-step colder spark plugs, the car is tuned on mhd stage 2+ I know it’s supposed to be custom tune but currently just to make sure it's even working properly that's why i have it on mhd stage 2+. When i checked my spark plugs they were crazy wet, im assuming because of my injectors as i had a crazy flame map. Car is fully straight piped soon going catback exhaust as it doesn’t sound good but i dont even know whats wrong with it. So in total i have got multiple combustion misfire, over boost( probably because of tune), and most importantly the white stuff plus the smoke from exhaust and burning oil smell. Im scared that it might be the head gasket, although coolant level dropped a little bit so idk if its condensation or coolant in oil. I got it checked out with my uncle he said it could be defective turbos but now idk whats exactly wrong as alot of issues appeared all at once.

Any help will be much appreciated as I'm really stressed over this car.

Thank you

[Mrmigs2011]

Take the car back to standard and take it for a long run...

If all the issues are gone on the drive take it around for a few hours incase it's the cold weather causing the condensation and milk issues.

If not check your oil filter housing gasket hasn't failed and mixing fluids.

If everything checks out and still having faults do a compression test to see if the silly tune hasn't melted something and k.o'd the head gasket.

[Hamzyy23]

Hey there what do you mean by “take the car back to standard “? Like tune it back to stock?. Also Im going to start with compression test as I have already driven it 3-4 hours and the milky stuff was still there, the car’s just parked outside although it does get cold here so I could believe it might be the condensation.

Although The burning oil smell from exhaust and the white smoke while gassing the car doesn’t make sense especially after new turbos unless the oil lines or coolant lines are bad or defective turbos

[tcphoto]

Just drive it and get it up to temperature, it is condensation. The car sat for awhile and may have been started a few times and not warmed up enough.

[Hamzyy23]

Okay I will take it for a drive for like 3 hours to another city and back

[Hamzyy23]

Although it ran for 3h straight with out the car being turned off, Plus another 3h with that car being turned off and on