Water Pump Leaks.
Class I leakage at water pump bleed holes is normal. Any Class II or Class III
leakage represents a problem with water pump.
Check water pump for signs of leakage (discoloration, corrosion, wetness).
There are two failure bleed holes located on engine side of water pump.
Check failure bleed holes for Class II and Class III leakage of engine oil or coolant.
If coolant is leaking from either failure bleed hole or water pump shows signs of leakage,
perform the following: