i havent takin the head off but I'm guessing when it spits out oil from were the head meets the block thats a sign of a blown head gasget? any other ways i can tell? before i go to the hobby shop
as far as i know........... Nitro RC motors dont have head gaskets........ it probably just needs to be taken off, then tightened down.......... there is the mill, a shim, and the cooling tower.....
Try tightening the head bolts a little. Don't break them! If that doesn't work, get a new gasket. Cheap, easy fix. Just be sure that the area that the gasket sits is clean. Be careful not to get debris in the cylinder, too. Put the piston at top-dead-center to help keep junk out.