al83s

Sorry to hear about your issues. My car had similar issues last week, it also has 89k miles. High-pitched whine is likely the waterpump bearing going out, or the tensioner/roller. Waterpump is a wear item and so are rollers, its not uncommon for it to fail on other porsche models as well, as a matter of fact most 928 owners replace their water pumps every time they replace their timing belt (~4-5 years) . Neither is the failing oil cooler,it also fails on 928s causing oil/water to mix. Deffinately replace the oil cooler, since it is not going to fix itself even if you see less and less oil in the coolant every time you flush. Im sure you already know, but when flushing - run your engine till it warms up and thermostat opens, so you replace as much of it as you can. Dont worry about using distilled water for flushing, garden hose will work just fine (it wont be in the engine long enough to cause the corrosion of your aluminum block) Just make sure that your final fill is correct. I was also pissed off that my car has developed all the issues lately (rare missfire, flashing CEL every week or so, clutch is starting to slip, CV boots torn, waterpump started to whine), but at the end of the day replacing few bolt-on items on a 9 years old car beats taking a depreciation hit every time you buy a new one). Think of it as a 90k miles service and do it yourself (I always do, because at least if I f*** something up - it my fault and I learn something new). Meawhile, have a beer, download a repair manual for your car, buy parts and start crossing the possible items off your list. Just my 2 cents. Alex