The head must be checked for flatness. If it has more than.002" warpage it must be heated in an oven and straightened. Heads with overhead cams can't be milled flat because that would leave the cam journals out-of-alignment. Since you're going to have the head checked at an engine machine shop, ask them for the torque specs, tightening pattern, and if they are "torque-to-yield" head bolts. If they are, they are only used once, then replaced, never reused. Also have them check it for cracks.
They can also sell you the gasket and other needed parts. That will make them even more willing to give you all kinds of pointers. They might recommend a specific spray-on gasket sealer, and they will describe the required surface finish that will help the gasket bite in and seal. You get that surface finish by using the correct scuff pad on an air-powered rotary tool. That same pad is what you use to be sure all of the old gasket material has been removed.
Wednesday, July 6th, 2011 AT 9:05 PM