It might pay to pull the radiator and have it flow tested. I found that mine was about half plugged up. It was fine around town with little load on the engine, but continuous use on the highway it would heat up some.

My coolant loss was not very evident by looking at the overflow reservoir... I didn't realize I actually had a problem with coolant loss until I started opening the radiator at lunchtime at work after the engine cooled. It seems that coolant leaking into #4 cylinder on the intake stroke was being replaced by combustion gases on the compression stroke. (at least that's what I _think_ was happening!) The level in the overflow would stay somewhat constant... but a look into the radiator revealed that the level was about an inch down after a 10 mile trip. The story of how I discovered the problem is actually much longer than this, but the point is to not trust the reservoir as an indication of coolant in the system.

Keep us posted...

I'll be adjusting my valves and re-torquing my head this weekend. I ran a bottle of injector cleaner into the gas tank and filled up on Sunday. I think my cold idle problem is somewhat improved, but it's probably too soon to be certain. I'm planning on cleaning out the TB this weekend when she's torn down for the other work... (fingers crossed)

QUESTION: On the throttle body idle air bleed adjustment screw... is it "safe" to remove that completely, and squirt some cleaner down there from the screw hole ?

C/YA!
Jeff