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DIY GOALS: Degreasing and Cleaning Engine Bay, Checking for fluid and oil leaks DIY TIME: 1 hour DIY Special Tools: None needed (unless you want to remove the fan) DIY COSTS: About $10 for Engine Degreaser, Engine Detailer, Armor-All, Aluminum Foil, Zip Lock Baggies and other cleaning agents that you may want to use. The BMW Ṋ Engine and it’s engine bay design are shared between several BMW Vehicles from 1998 through 2006. These are the E46 3 series, E39 5 series, Z3/Z4 3.0, X3/X5 3.0 and the early years E60 5 series. So this DIY for washing the Ṋ engine and checking for basic Oil leaks can be applied to other BMW cars besides the E46 3 series. In the DIY when I refer to the Ṋ I am referencing to all the cars. That said this DIY for Engine washing can be used as a general guide for any modern era BMW vehicle. I spent a lot of time looking for an online DIY for washing the Engine Bay of a car to find there was none. There was lots of various advice ranging like lathering down the entire bay with degreaser and power hosing it to hell and back. I also read advice saying never use water on an engine bay and to just use a toothbrush and rag with some light degreaser and WD40 to clean the entire bay. I did not have all week to clean the engine nor was I going to go in there like Rambo and power hose it down like many Youtube videos on engine washing tend to show. After combing through some better information and talking with my friend at BMW′s Mt Kisco Dealership in …