The tensioner replacement is only to improve the startup "rattle" that you are experiencing. It won't (shouldn't) alter your camshaft deviations. You need to lock the crank and 1 camshaft relative to which tensioner you are replacing. Use the search function for details.
The plastic pad replacement is a whole different story which, (I believe), can be done with the engine in situ, but most experienced people say its quicker & easier by removing the engine.
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2001 Boxster S (triple black). Sleeping easier with LN Engineering/Flat 6 IMS upgrade, low temp thermostat & underspeed pulley.
2001 MV Agusta F4.
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