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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.
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Where are the spark plugs located in 2002 cavalier?
on the motor
Where are the spark plugs located on a 2002 Nissan Pathfiner?
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in the heads
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Where is the PCV valve located for a 2002 Nissan Sentra?
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