2002 ford explorer xlt 4.0 timing chain tensioner?

I'm thinking about replacing the timing chain front and right side tensioner it rattle doing cold start then when warm it goes away. I never worked with this type of vehicle and little worry about timing chain moving while I take the tensioner out. Any hint on how to remove this tensioner without going into bigger trouble.

Pull the motor out, you have to do both or you're just wasting your time and money.

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