HI! I JUST REPLACED THE WATER PUMP ON MY 91 300E WITH A MERCEDES REBUILT PUMP. EVERYTHING WENT AS PLANNED. I HAVE REPLACE THE WATER PUMP ON AN 86 300E BEFORE.
WHEN I CRANKED THE ENGINE I HEARD A LOUD CLICKING NOISE THAT SOUNDED LIKE A LIFTER TAPPING. I REMOVED THE BELT AND CRANKED THE
ENGINE AND THE SOUND WAS STILL THERE. I THOUGHT I MIGHT HAVE A DEFECTIVE PUMP. ANY SUGGESTIONS
THANKS RICK