using a very fine sand paper on a very straight sanding block keeping it flat to the surface after excess gasket has been removed with a scraper gently. i have done this numerous times without fault although I'm not a mechanic. I work on all my own cars. Place clean rags in cylinder bores so no dust and crap goes in them. Remove any and all excess dust to avoid damage.
It requires replacing the head gasket.
It is a good idea, most the time you blow a head gasket the head will be warped.
Yes.
Average cost to replace a head gasket is $1000
shop vac
Your cylinder head gasket needs replacing.
It could, if the old gasket had failed.
no
how long does it take
Resurfacing the head of an engine is necessary when replacing the head gasket. An improperly surfaced head will not allow a tight seal and can result in a costly repair.
No you do not.... the valve cover only bolts to the head, and the head bolts to the block... True- these are two different jobs. When changing your valve cover gasket you may just want to ensure that your head bolts and lifters are still torqued down properly. Otherwise, DO NOT remove the head gasket if you simply want to change the valve cover gasket. when replacing the head gasket you should replace the valve cover gasket and may need to (depending on make & model) replace the egr gasket, intake mainifold gasket, and exhaust manifold gasket ...but not the other way around. If your replacing the head gasket ask your local auto shop if they carry a head gasket kit that includes everything necessary in one box...but if your just changing the valve cover gasket then just change that.
You do not need any special crankshaft installer, when replacing the head gasket. The crankshaft and the head gasket are on opposite ants of the engine.