![Can I clean the valve cylinder head with it still in the car? If I spray brake cleaner will it contaminate the oil? Is it worth to clean it? : r/BmwTech Can I clean the valve cylinder head with it still in the car? If I spray brake cleaner will it contaminate the oil? Is it worth to clean it? : r/BmwTech](https://i.redd.it/d399e2t1sh061.jpg)
Can I clean the valve cylinder head with it still in the car? If I spray brake cleaner will it contaminate the oil? Is it worth to clean it? : r/BmwTech
Engine Cleaning for Cars and Trucks - PG County and surrounding DC area — Kenilworth Car & Truck Wash
![How to clean cylinder head and engine block contact surface before gasket change? - Motor Vehicle Maintenance & Repair Stack Exchange How to clean cylinder head and engine block contact surface before gasket change? - Motor Vehicle Maintenance & Repair Stack Exchange](https://i.stack.imgur.com/TcAjp.jpg)