One problem related to water pump has been reported for the 2004 Honda Civic. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Honda Civic based on all problems reported for the 2004 Civic.
Hot air was not blowing. Noticed little bit of green coolant on the garage floor. There was enough coolant in the reservoir. Took it to the Honda dealer. Pressure test was performed. Service told me that head gasket blown and need to be fixed immediately otherwise car may become stalled anytime. 5 months ago same dealer performed timing belt, water pump maintenance. Mileage is very low for head gasket related issues.