Post by
kouki munster »
https://forums.nicoclub.com/kouki-munster-u34314.html
Thu Apr 11, 2013 6:16 pm
FYI, anything abrasive(I.E. roloc, steel wool, scotch bright pad) will remove material from the surface of the block and cause low spots, but shouldn't be an issue if you are running a stock head gasket and don't get to aggressive with the removal process. If you are going to be running a metal head gasket I would use a fresh razor blade with some brake cleaner, just make sure that you keep the razor blade flat against the block surface with steady even pressure, and be mindful of edges.
Also, to clean the cylinders out once you are done, just turn the block upside down(cylinder bores pointing at the ground) and hose them out with brake cleaner. Once you are satisfied that everything is clean and the brake cleaner is dry turn it right side up and dump a little oil in each bore making sure that is gets around the edges of the pistons, rub it on the cylinder walls, let it sit a few min. and then turn the motor over by hand a few times.