What size motor? no matter, do it while it's cold.
Disconnect the battery, remove the spark plug covers and cable, and remove the old spark plugs. Put in the new spark plugs, replace the covers and cable, and reconnect the battery.
I would replace the spark plugs after 50K, the wires and plugs again at 100K.
Remove the spark plug wires from your 2002 Mercury Grand Marquis spark plugs. Remove the spark plugs by turning them to the left with a deep well 5/8 socket. Reverse the process to install the new spark plugs.
Take it to a dealer
Disconnect the battery, remove the spark plug cables and the boots and remove the spark plugs. Put in the new spark plugs, replace the cables and boots, and then connect the battery.
How do you replace the spark plugs on a Peugeot 307?
How to replace spark plugs in a 1989 jeep cherokee?
Disconnect the car battery, disconnect the spark plug cables, and remove the old spark plugs. Next put in the new spark plugs, re-connect the spark plug cables and connect the car battery.
yes
8 spark plugs
8 spark plugs
how to chang spark plugs in a 1992 Pontiac grand prix