Simple question, fitted new genuine ford head gasket to realise I hadnt put washers on bolts so had to take them out, will head gasket be ok with new bolts torqued down or will it need a new one again? Ordering bolts just now so thought Id better ask. Also bolts say 18/41 lbs/ft then 90 degrees then 90 degrees again am I better doing it this way or how the haynes maual says?