PRW 44-45 PQ Series Electric Racing Water Pump - Manual (Page 2)

Electric Water Pump Installation Guide (Continued) Page 2
FORD SB(260-351W, 351C-400M, BB 429-460 ONLY:
Using the gasket, 5/16” fasteners, and cover plate provided, apply sealant to the gasket and hand-tighten in
place with the additional fasteners provided. The last four (4) fasteners will be used to secure the water pump to
the housing bolted through the cover plate as described in Step 2 above. Tighten the water pump fasteners first,
then torque the remaining hex machine screws into place using a crossing pattern to 20 ft lbs.
Step 3 – Installing the Hose Inlet and Hoses
First make certain that adequate clearance is available to install the water pump hose to the inlet fitting provided. Some
larger dampers may require a longer (5” extended fitting) or smaller diameter (1.50”/1.25” male hose) inlet fitting to mate
with your original or aftermarket radiator hose.
If fitment does not appear to be an issue, apply a small amount of thread sealant, Teflon tape, white grease or anti-seize to
the pipe threads of the hose inlet. Tighten the hose inlet using a strap wrench. Some white grease inside the lower hose
will also simplify the hose installation.
Step 4 – Wiring the Water Pump
The RED Wire is POSITIVE and should be connected to a 12 Volt, 15 or 20 Amp fused source. The BLACK
wire is NEGATIVE and should be connected to a suitable ground such as the engine or chassis. You may wish
to install a toggle switch to maintain coolant flow for additional cool down even with the ignition switch turned
“OFF”. NOTE: Incorrect wiring will cause damage to the pump motor and/or your engine.
Step 4 – Operating the Water Pump
Refill your cooling system, replace the fill cap, and turn on your ignition switch and/or water pump toggle switch. Start
the engine and allow the thermostat to open and coolant to flow. Recheck your coolant level after one heat cycle and “top
off” coolant as necessary. Never let your pump run dry for more than a few seconds. Never remove the radiator cap wile
engine is hot.
IMPORTANT: Chevrolet small blocks with an extra bypass hole may require a 1/8” pipe tap and threaded pipe plug
installed to prevent leaking.
Do not use radiator stop leak or block sealer with this water pump. Due to close tolerances between the impeller and the
housing, additives may cause electric motor lock-up and void the warranty.
44 pq electric water pump 1722 v1-3 mcg.doc
PRW Industries, Inc.
1722 Illinois Avenue
Perris, California 92571
Tele: (951) 436-7900 FAX: (951) 928-8555
Tech: (888) 377-9779
www.prw-usa.com