It sounds like you are looking at the fuel injectors rather than the spark plugs. The spark plugs are located under the large cover on top of the engine that identifies it as a quad 4 engine.
There should be 4 fasteners located towards the center of the cover if memory serves.
Do not try to remove the other around the outer edge of the cover.
Make sure you remove the electrical connector and the previously mentioned fasteners, and pull straight up on the cover.
There will be resistance to this because you are pulling the spark plug boots off as you lift.
Since the spark plugs are recessed there may be debris around the spark plug holes that will fall into the cylinder and could damage your engine.
Make sure that you remove this debris before removing the plugs.
Blowing it off will air or even vacuuming could work but but remember that this is very important
when do you change spark plugs
To change the spark plugs on a 1997 Oldsmobile Achieva, first, ensure the engine is cool and disconnect the negative battery terminal. Remove the ignition coil or spark plug wires from the spark plugs, being careful not to damage them. Use a spark plug socket and ratchet to unscrew the old plugs, then install the new plugs, ensuring they are gapped correctly. Finally, reconnect the ignition components and the battery terminal.
On a 1997 Oldsmobile Achieva SL, the spark plugs are located on the engine, beneath the ignition coils. To access them, you typically need to remove the engine cover and the ignition coil pack, which sits directly above the spark plugs. The spark plugs themselves are threaded into the cylinder head and can be accessed once the ignition coils are removed.
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