Aluminum crush washers | Bob Is The Oil Guy
I also want to say that I think a copper crush washer on an aluminum oil pan is not so kosher. B. Blokey. Joined Feb 21, 2003 Messages 1,034 Location GA, USA. Jun 1, 2004 #6 quote: I also want to say that I think a copper crush washer on an aluminum oil pan is not so kosher.