These holes are on my engine, below the oil filter housing, behind the alternator. Im a bit confused as to what goes in them. If i had to guess i would say oil cooler. The threaded hole im pretty sure is for an oil pressure switch, and the line below that goes to the vanos solenoid. The two large ones with the small hole in the middle is what im confused about, as ive seen on the obd2 cars a vanos line installs in one.
If it matters, I think the block is a m52, head is a m50.
 
							
						
					If it matters, I think the block is a m52, head is a m50.
 
							
						
 
	 
	







 
							
						
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