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At 100K, I would do the following:
Swap chain tensioner to the latest version.
Check the crank pulley damper for excessive play.
Check the cam cover gasket for leaks and replace if it is leaking before it drips onto the exhaust manifold and causes a fire.
Cam cover PCV rubber diaphragm.
PCV hose to the turbo inlet.
Oil filler cap housing O ring.
Oil filter housing / heat exchanger gaskets.
If the budget allows, maybe a walnut blast of the cylinder head ports/valves and ultrasonic clean of the intake and injector nozzles.
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