cricket noise

the cricket chirps around the cylinders, I think. the chirp is usually constant and only when the engine idles. It's definately coming from the middle top left of the bay.

Will

Either the idler pully, worn belt, or the ac bearing...Use a wooden dowel like a stethescope and you will be able to track it down.

Easy to check.
Base gaskets burn out, only cost $5
With engine running spray carb cleaner moderately at base of throttle body, your idle will pickup and chirp will go away momentarily.