BMW 730d Injector Copper Seal Leak — Diesel in Oil
The copper sealing washers on M57 injectors degrade over time, allowing combustion gases and diesel to pass the injector bore into the rocker cover area. Symptoms include diesel smell in cabin, oily or sooty residue around injector bases, and oil level rising due to diesel dilution. Continuing to drive causes rapid bearing damage from diluted oil.
Onarım / Çözüm
No confirmed fixes yet. Share yours below.
⚠️ Yanlış Teşhis mi?
No commonly reported misdiagnoses for this fault yet. If you have replaced a part that did not fix this BMW 7 Series 2002 problem, submit a wrong diagnosis report — it helps other drivers avoid the same costly mistake.
🚗 More About This Vehicle
📖 Related Repair Guides
Deneyiminizi paylaşarak diğer araç sahiplerine yardım edin.
Your real-world fix helps thousands of drivers worldwide. Takes 2 minutes.