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There are many gaskets on any car engine. If you are asking about head gaskets, they are between the cylinder head(s) and the engine block. The cylinder head is under the valve cover. --------------
This answer varies by vehicle type, so please be more specific.
There are many gaskets in many different vehicles. More info needed.
Yes.
Silicone spray.
there are 14000 parts in an average car
It depends on the type of car.
yes, their sucking air, 65;
14,000
30000
you mean like on a car? Probably not a seal exactly. But i know you can get gasket material to make gaskets from many auto parts stores.