MANIFOLD ASSEM. 6P7708 - Caterpillar

Engine:
3011C (S/N: G1P1-UP; 3111-UP)
3013 (S/N: 4XD1-UP)
C2.2 (S/N: NCB1-UP; XYE1-UP; TAG1-UP; C4M1-UP; G7M1-UP; JAW1-UP)
Generator Set:
C1.5 (S/N: NCA1-UP; TAF1-UP; C5N1-UP; G7N1-UP)
Industrial Engine:
3013C (S/N: G3P1-UP; 3131-UP)
3024C (S/N: G4P1-UP; 4241-UP)
C1.1 (S/N: G8M1-UP)
A small amount of coolant leakage across the surface of the seal to the jacket of the water pump is normal. This leakage is required to provide lubrication for the seal. A hole is provided in the water pump housing in order to allow this coolant to drain from the water pump housing. Intermittent leakage of small amounts of coolant from this hole is not an indication of an issue with the water pump seal.Improvements to the water pump seal have reduced the amount of coolant that is required to lubricate this seal. As a result of the improved seal, the rate of coolant flow has been reduced.The part number for the water pump has not changed.