BTW, I thought it might be useful to paste below what you suggested in the spark plugs thread in case someone searches the forum for "wiper arm" and finds this thread. I'll definitely take a look at the pcv valve and the coolant lines once I get the wiper tray off.
Other things you might want to consider while the wiper tray is removed and everything is opened up to do a good job:
- wiper motor and hoses
- pcv valve.
- valve pan cover gaskets.
- power steering hoses and pump.
- spark plug wires. I have Champion on my 2002 and they have performed great for three+ years now.
- looking at coolant lines, maybe need a mirror to help there as there is one is typically tucked in close to the back side of the engine. They can rust out and be a bear to remove.
- applying Fluid Film rustproofing especially to any steel coolant lines or rusted areas or clamps.