need help on step by step replacing this part please if anyone could. the elbow just blew apart today while driving and drained all the coolant. i had the same part replaced about 3 months ago. i had no choice to drive the car home about a mile and was running almost to the red on the temp gauge, and is now making some slight knocks and ticks when i cooled it down and then ran it again for 30 seconds or so.. did i do major damage or is this normal?