6th Gen ('00-'05): Coolant
#4
I had a coolant leak in my last Monte that was hard to locate, found out it was the plastic coolant elbows going from the tensioner to the block. After I changed those the leak went away but a year later I had the same issue. I pressure tested the radiator and had a big crack in the plastic on the drivers side. Seems everything plastic cracks sooner or later.