Find guaranteed Water Pumps for sale on the web and save money. Coolant: Coolant is typically a mix of water and ethylene glycol. Numerous instances called Anti-Freeze, coolant serves several purposes. As it is typical name implies, coolant prevents freezing, but it also gives lubrication for the waterpump, increases boiling point of water, and keeps rust and scale from forming in your cooling method. Coolant should be changed on a regular basis, verify your owners manual for the recommended schedule. PH level is critical to maintaining your coolant from becoming a metal eating liquid. When you check your coolant for freeze point, also verify out the PH level and make certain your coolant has not turned acidic.