How do you change heater control valve 2000 catera?

Answer 1

I changed mine just recently. As best I can remember, this is the way it played out:

The heater control valve is located behind the planum (the very big aluminium-looking cover on the top part of the engine). If you trace your hands to the back, past the 4 vacuum hoses, you will see it - it's cylindrical with a 3 fat hoses coming out of the side of the shaft below the cylindrical head. You will have to remove the planum for easy access though, and for that you will need a torx socket (I cant remember the size, maybe a 3/8 or whatever that comes out to in metric). Remove the torx bolts and lift the planum straight up, being careful not to damage the "O" rings underneath for the intake manifold. Oh, you will also have to loosen up the intake hoses in the front for easier access, and also remove the vacuum hoses in the back. Once you have that done, it's time to remove the HCV. It is attached to the hoses with clips. You will need a pair of needle-nosed pliers for this, but I would suggest that you get the ones that have a bent beak, or else it may take you significantly longer amount of time to loosen up the pressure clips that hold the hoses. Squeeze the tabs on the pressure ring and slide it down the hose a bit, then remove and replace with the new HCV.

Hope this helps.