gasket or o-ring. always need one or the other
you shouldn't have to change them unless they are leaking, blown, or you take the heads off for a repair or rebuild
To replace a blown head gasket on a 1998 Chevy Lumina, it would cost between $18 and $174. This depends on the brand part and any labor costs.
Plugs, plug wires, burnt valve, craked head, blown head gasket, intake manifold gasket leak, are possible.
take it to a Chevy place
if you are going to replace the intake gasket you might as well change the head gaskets at the same time[it will cost you a little now but save you a lot later
$700 - $1200
You may have a blown head gasket. This needs to be repaired before you drive the vehicle or you can blow your engine.
You need to loosen the oil pan enough to to get the cover in place. It's better to take the pan off and put it back on last with new seals.
How much antifreeze does a 1998 chevy mabilu ls take
how do i replace a blown head gasket on a 98 Toyota corolla
how to repace the distributor on an 98 chevy silverado
Mobil 1 5w-30