KIT-DT GASKET 4542227 - Caterpillar

Water Pump Leak Detection
A small amount of weepage across the surface of the water pump seal is normal. The weepage is required to provide lubrication for this type of seal. A weep hole is provided from the pump housing to allow coolant to drain from the pump housing and not accumulate in the water seal and oil seal chamber.The following criteria is provided as a guideline to determine if the water pump should be replaced.
Table 1
Condition Result
Intermittent drip - 1 drip per second or less, for a period of 3 days: wetness, or discoloration (dried coolant) around the weep hole Do not replace the water pump. Continue to monitor the water pump and coolant level until the drip stops.
Constant stream and/or intermittent drip greater than 3 days Replace the water pump.