How to Install the Power Steering Pump in the 2003 Nissan Frontierby Chris Moore
A power steering system employs a hydraulic system similar to the braking system. The power steering pump sends fluid to the system. Installing a power steering pump on a 2003 Nissan Frontier is simpler than on most other vehicles, largely because the truck has a large engine compartment. The pump is operated by one of the engine's drivebelts, which you must also work with while installing. You also have to get the air out of the system following installation.
Place the power steering pump within its mounting bracket on the engine block. Connect its three mounting bolts with a torque wrench. Tighten the front bolts to 144-180 inch-pounds, and the rear bolt to 16-22 foot-pounds.
Connect the pressure line to the pump, tightening its banjo bolt to 37-50 foot-pounds. Connect the return hose clamp, tightening its hose clamp with a screwdriver.
Install the drivebelt along the pulleys for the power steering pump, the water pump and the crankshaft. Look for a routing diagram near the radiator for the correct path. Tighten the bolt on the fourth pulley -- the idler pulley -- to adjust the belt tension.
Fill the power steering reservoir with Dexron III automatic transmission fluid to the "Cold" mark, which is either on the fill neck or the dipstick.
Start the engine and let it run at a fast idle with the wheels facing forward. Turn the steering wheel to each side without hitting the stops on either side to bleed the air out of the system.
Leave the engine running for several more minutes with the wheels facing forward before shutting off the engine.
Inspect the fluid level and see that it is at the "Hot" mark while the engine remains at normal operating temperature. Add fluid if needed.