How hard is it to change the spark plugs in a 2002 nissan altima 3.5se?

Q:

A: Yes the intake manifold has to be removed. I can whip out $1,000 worth of tools and have it done in 60 minutes. Really Spark Plugs have to be changed every 90 to 100 thousand miles. Isn't time for other servicing? Trans fluid change new brakes shocks alignment and tires? Nissan Mechanics need money too. Seems like Nissan owners are like the rest of us spending more on fuel and less keeping the car up.

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