Im just guessing here mind you..
The coolant issue is baffling - no guesses
The whine/squeal might be a combination of a weak battery and the very whiney Mitsubishi generator our cars have in them from OZ.
My generator will whine like a mother for about 30 seconds after cold start. The higher the load on the gen, the more noise it makes. If your battery is dying, the gen my be doing its dead level best to get the voltage back up, hence a whine that diminishes as things warm up as the battery comes back to life. The battery in the GTO is a wuss.
I would not call it a squeal, but more like a whistle-like whine. It is a normal OC for this gen.
Guys - don,t bust my chops for calling it a generator vs. alternator. The word alternator is... well, the word makes no sense to me. We have an AC generator as does practically everone else that owns a car or a Honda Portable.
Hope this helps, but like I said, it is a SWAG. Have the batt load tested and see what comes up. At least you may be able to rule that out.
BTW - I am wearing my Terps shirt today - have spent a lot of time in MD
Last edited by bg2m8o; 10-20-2006 at 01:23 PM.