I took the head off of my BMW S54 and the block had a lot of carbon buildup. My mechanic friend told me that nylon drill attachments won’t scuff the metal because it’s a softer material than the metal. I took the liberty of removing all the carbon i could and i noticed that a lot of carbon gunk seeped past the piston rings (some of it gets pushed back up when i rotate the engine)
Is the carbon crud along with all the tiny metal particles from scotchbright pad/nylon drill attachment going to damage my crank? Should i take the block out and disassemble and clean everything?
Is the carbon crud along with all the tiny metal particles from scotchbright pad/nylon drill attachment going to damage my crank? Should i take the block out and disassemble and clean everything?