Have you had the alternator checked? Also, as far as the coolant, check to make sure there is no coolant mixing with the engine oil. Are you able to see any leaks? If it only happens when the engine is running, I would think it is the water pump. Check it to see if there is evidence of it leaking from the weep hole.
Let me know what you find.
Joe
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Thursday, June 10th, 2010 AT 9:26 AM