Hello I am new and still have my original 2003 FWD AutoT 112K. I have a knock sensor (KS) replacement to do for P0325 (also have P0446 & P0446PD), and while the intake manifold (IM) is off, I've seen recommended to also 1) replace the IM gasket, 2) the KS harness, if worn, and 3) bypass coolant ...