the Sentra has oil packs that are on each cylinder which means that there are no plug wires. It also looks as though the plugs are hidden because there are 4 black squares that are screwed to the top of the engine (under the plastic engine cover) when you unscrew the 4 plastic blocks and pull them up they will be solid plastic tubes down to the plugs and once removed you can change out the plugs as on a "Normal" engine.
on the motor
You can find the spark plugs for your 2002 Nissan Pathfinder on each side of the engine. The spark plugs will be near the top of the engine. A six-cylinder engine will have three spark plugs on each side.
On a 2002 Isuzu Axiom, the spark plugs are located on the engine block, beneath the ignition coils. To access them, you will need to remove the engine cover and the ignition coil assemblies, which sit directly above the spark plugs. Once the coils are removed, the spark plugs can be unscrewed and replaced.
in the heads
To change the spark plugs in a 2002 Nissan Sentra 1.8, first, ensure the engine is cool and disconnect the negative battery terminal. Remove the ignition coil by unscrewing the bolts and gently pulling it off the spark plug. Use a spark plug socket to unscrew and remove the old spark plugs, then install the new ones by hand, making sure to torque them to the manufacturer's specifications. Finally, reattach the ignition coil and reconnect the battery terminal.
To change spark plugs on a 5.9 2002 Dodge Ram 1500, locate the old spark plugs. These are located at the end of the 8 wires inside the vehicle's bonnet. Remove the old spark plugs and replace with new.
Screwed into the cylinder head.
In a 2002 Oldsmobile Bravada, the spark plugs are located on the engine's cylinder heads. To access them, you'll need to remove the engine cover and possibly the ignition coils, which are mounted on top of the spark plugs. The engine is a 4.2L inline-six, so the spark plugs are positioned along the sides of the engine, typically requiring some maneuvering to reach.
You should have C.O.P. ( coil on plug ) The plugs are under the coils.
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