HFS-6 install on 4.0V6 Tacoma

[Richard L]

The wetted parts of the pump is designed to work with water. But the pump housing is not designed to be wetted constantly. The housing is Zinc plated so it will corrode during constant exposure to water especially there are salt involved. Zinc is commonly termed as a sacrificial coating, sensitive to water errosion and eventually works it way to the bare steel and start rusting.