VG33E Removing Intake Plenum soon what should I replace / clean

[Wrierblock20]

Going to be replacing 2/4/6 injectors as #2 is leaky, what else should I be replacing and inspecting while there? Any tips tricks in removal of plenum and how difficult is it really? Also been blasting the hex bolts with PB blaster every morning so hopefully they come out with ease and DONT strip.

[R50JR]

relocate knock sensor

[abnrjd]

REPLACE ALL THE GASKETS! do not reuse the gaskets buy new ones if not you will have intake and exhaust leaks. I replaced my valve covers cause of leaks and part of that is the removal of the upper and lower plenums. Rock Auto has been an excellent source for replacement parts

[macgiver]

mac , astrorami has good point ,my VG30DE motor w/internal knock sensor failed - the fix to relocate , something I saw on youtube showed drilling ,tapping, and way over on the passenger "bank". I said SHeeeeeeeeeaat! And I took off the goofy long plastic Art-Deco eng. cover and bolted a NEW OEM knock sensor to TOP of intake manifold (experimenting now ) by utilizing one of the "covers" MOST ENGINE CENTERD threaded hole , w/ thick steel washer on top and a sufficiently DEEP bolt .
I'm serious it seems to work as good or BETTER than the stupid factory "Inside Job" ! I was even able to get the EXTRA 2deg.timing advance that I like (15 deg. stock to 17 1/2 deg. BTDC for crisp response ! )