BMW Repair: OVERHEATING, water pump impeller, radiator hoses


Question
I BUOGHT A 1995 325IS BMW WITH 85000 MILES THE CAR OVERHEATS THERE IS NO WATER LEAKING OUT,NO WATER IN OIL. SOMETIMES IT RUNS FINE AND OTHERS IT OVERHEATS. TWO DAYS AGO I TOOK IT FOR A HOUR DRIVE AND IT OVERHEATED ON ME THIS TIME THE NEEDLE WENT ALL THE WAY TO HOT AND ENGINE LIGHT CAME ON, I PULLED OVER TO CHECK AND AS I WAS OPENING HOOD THE EXPSANION TANK RIP ONE OF ITS SIDE AND LOST ALL MY WATER. NOT SURE IF IT COULD BE BE MY THEROSTAT. BELT,HOSE,RADIATOR,HOSES WERE REPLACED 11/2000.

Answer
if you did not get a real good deal on it, you are in trouble. either the water pump impeller has come loose from the shaft, or more likely since the tank blew, the head is cracked. They are bad about cracking between the water jacket and the combustion chamber, on the machined side. A head costs as much as a used engine, so buy a used engine.