[gravis2000]

I have just replaced my water pump after about 160,000 miles on it. I was losing a great deal of fluild just as you were the damn cap was bad the seal was broken and I was losing about 1 gallon of fluild a day I replaced the cap with a new one. It fixed it. Check to make sure the seal on the cap is in one piece a new cap is cheap thing to try. Other then the intake mainfold gasket I have put 193,000 miles on the car with no other major issues.