Where do you find your cams, timing chain & valvetrain parts. on 2003 Oldsmobile Alero

I have an olsmobile 2003 alero, and my mechanic said these parts are required, also a valve cover gasket, and fuel pump.

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4 answers 1 comment
2.2 engine? Get another opinion!! Cams and valve train just dont sound right. Timing componets and gaskets, yes!
I agree with wetry
agree with wetry i think your mech is guessing a little
Yes , those are all parts you may find on your engine.........Is your mechanic doing a re-build , or just an oil change (deluxe package)? And yes he's correct in stating that many of those parts are 'required' to operate together as designed in order for it to run right.
it would probably be cheaper to get another used engine.