I am Teh Edumacator.
Join Date: May 2005
Location: ATL, London, and Barcelona
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Replace the water pump using one with a metal impeller. The stock pump has a plastic impeller that fails suddenly and causes huge overheating problems.
Replace the thermostat and thermostat housing; make sure the new thermostat housing is an aluminum one.
Consider replacing the coolant overflow tank, its holes tend to get clogged over time and cause reduced coolant flow and therefore cooling efficiency. The plastic neck on your radiator may one day crack; if so, replace it with a radiator that has an aluminum neck. If you have the cash, you might even replace it pre-emptively.
Go to auto-rx.com, and run their treatment.
You treat your bimmer right, and it will treat you very well. Treat it badly, and you'll have nothing but problems.
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1999 E39 540i/6-VF Stage 1 S/C, Dinan exhaust, Dinan strut+shock braces, Dinan ltwt flywheel + clutch, Dinan Brembo BBK, Dinan monoball, H&R Springs, Koni Yellows, M5 sways, Dinan forged 18" wheels, &c.
1995 E38 740i. Highly modded. Faster than you.
Sold 2-28-07: 1997 E36 M3/4, 8-30-05 RIP 1997 528i
Lindsay fan club member.