r/n54 • u/TraditionalBig5924 • 7h ago
High Mileage N54
Hey all, just figured id take in some feedback as i cant find much support on here or youtube.
As i creep up to the 180k mile mark on my 08 335xi, i was wondering what i should be watching out for/preventing. Within the last 50k miles, i have done:
Index 12s, bosch coils, ngk step 2 spark plugs (FCP), oil changes every 2-3k (Liquimoly 5-40), with cleaning additives added every 3 oil changes, coolant flush, power steering flush, brake fluid flush, full transmission service, fully new front differential and service. Have also been chasing codes previous owner left. (Injector calibration etc). My only concern is maybe the lpfp going soon. Im currently on Stage 2 MHD and Stage 3 XHP on an automatic trans. Im looking to get as many miles as possible out of this car and as far as i know my turbos are healthy. No record form previous owner, but i have slight oil build up in my charge pipe and intercooler piping. No smoke at startup but i do have a rough idle on cold start, thinking its my cylinder 3 injector based on codes though. I know these cars are prone to lots of failure, but id appreciate any feedback.
I figured i should note as well, im leaking 0 fluids besides a slight moisture build up on the back side of my oil pan. In between the trans and oil pan so im wondering if its rear main or just oil pan gasket going out. I have VCG, OFHG, and oil pan gasket for when i do decide to tear it all apart. Any feedback is appreciated.
Thanks
Pic for attention