Ok I am getting ready to put the engine back together. When I go to put the gaskets on the engine covers, do I need glue or gasket cement? And the last time I replaced the head gasket I didnt use any, was I suppossed to? When I put the crank shaft position sensor back in, do I need to use the yamabond crap where it sits in the case, or can I get some stuff from napa and use it? I couldnt get all the gasket crap off the head with gasket remover, how can I get that residue off without scratching the head surface? The last time I took it off it was much easier. And what is the reason for using a thinner head gasket? Should I put one on while i have the head off?