Install an Electric Water Pump

Tools and materials are required, including a strap wrench for tightening the inlet fitting, Teflon tape for sealing the inlet fitting, silicone or gasket sealant, a set of 3/8″ drive Allen head socket wrenches, and a torque wrench. The electric water pump relay kit is intended for electrical installations that are straightforward and dependable.


Plan your installation carefully because OEM equipment (such as the power steering pump, alternator, and other components) may need to be repositioned in order to provide clearance between belts, hoses, and other components. The original bypass and/or heating hoses to the vehicle are also included.


If the water pump is not in use, it should be turned off or properly diverted. Because the water pump pulley is no longer driven by the belt, a shorter drive belt must be utilized to bypass the original water pump pulley.


It is possible that the tension/idler pulley will need to be relocated in serpentine belt drive systems.


Step 1: Detach the old water pump. Check to see that the engine is sufficiently cool to perform the job. When working with electrical equipment, take extra precautions. Disconnecting or otherwise disabling the battery is recommended. Empty the coolant and remove the existing water from the system.


Remove all of the old gasket material from the engine block with a wire brush. Make use of a high-quality gasket sealer as well as the supplied sealant.

Hardware and gaskets are used to keep leaks at bay.


Step 2: Putting the Water Pump into Place

This Electric Water Pump was created to be installed in the factory-installed location on the engine. Examine and disinfect the new sections of any debris that may interfere with the gaskets’ ability to seal Install the “O” rings if they haven’t already been done so.


Assemble the water pump elbows, coat the fastening threads with the anti-seize supplied, and manually tighten the fasteners. It is also recommended to use white grease or a thin layer of silicone sealant between the elbows and the pump housing.


After that, sealant should be applied to the water pump side of the gasket. Attach the gaskets to the back of each side of water pump, making sure the gaskets are aligned with the bolt holes Sealant should be applied to the engine block, and the water pump should be bolted into its proper position Completely tighten the water pump housing and elbow fasteners after adjusting each of the four bolts until they are a snug fit. Tighten the engine block fasteners to a recommended 25 ft/lbs.

Apply sealant to the gasket and hand-tighten it into place using the gasket, 5/16″ fasteners, and cover plate that were provided.


Use the additional fasteners that have been provided to secure it in place. The final four (4) fasteners will be needed to attach the water pump to the tank.

As detailed in Step 2 above, the housing is fastened to the cover plate with a hex wrench. First, tighten the bolts on the water pump. Then, using a crossing pattern, twist the remaining hex machine screws into place to a maximum of 20 ft/lbs. In this step, you will install the hose inlet and the hoses.


First, check to be that there is sufficient clearance to connect the water pump hose to the inlet fitting before proceeding.

supplied. It is possible that larger dampers will necessitate a longer (5″ extended fitting) or a smaller diameter (1.50″/1.25″). To connect to your original or aftermarket radiator hose, you’ll need an inlet fitting (male hose). If fitting does not appear to be an issue, a tiny amount of thread sealant, Teflon tape, white oil, or silicone may be used to seal the threads.


An application of anti-seize to the hose inlet’s pipe threads Using a strap wrench, tighten the hose inlet until it is snug. a small amount of white grease

Additionally, placing the lower hose within the upper hose will facilitate hose installation.



It is recommended that you use an electric water pump relay kit to make the installation process easier

and to deliver the most dependable service possible. The Red wire is a positive wire, and it should be linked to the high voltage source.


Positive amperage output of the relay or switched 12V positive output of the relay The Blue wire is negative and should be connected to an appropriate grounding point, such as the engine or the chassis It is possible that you will want to install a toggle switch to maintain coolant flow in order to achieve further cooling.


NOTE: Due to the configuration of the impeller, the motor should operate at a lower speed. It should not be connected to operate in reverse mode. Incorrect wiring will result in damage to the pump motor and/or your electrical system.


Putting the Water Pump to Work

Fill your cooling system with water, replace the fill cap, and turn on your ignition switch and/or the toggle switch for your water pump.

Engine shutdown allows the thermostat to open and coolant to flow through the engine. Check your coolant level after one heat cycle and “top it off” if necessary “turning off” coolant as needed. Never let your pump run out of water for more than a few seconds at a time! Never remove the radiator cap from the car while the engine is still hot.


WARNING: Chevrolet small blocks with an extra bypass hole may require a 1/8″ pipe tap and threaded pipe stopper in addition to the other components placed to keep the water from leaking.

When using this water pump, do not use any radiator stop leak or block sealer. Because of the tight tolerances between the impeller and the shaft, the use of additives in the housing may cause the electric motor to lock up, voiding the warranty.

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