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Put a drain pan under the radiator, and open the radiator drain. Allow the coolant in the radiator to drain into the pan. Replace the drain plug. Seal the container, and store it for later use.

Disconnect the throttle cable and its bracket from the throttle body with a socket wrench if your vehicle has an automatic transmission. For all vehicles, detach the accelerator cable and its bracket from the throttle body. Remove the actuator and its bracket from the cruise control if your vehicle is so equipped.

Detach the hose from the air cleaner with a socket wrench. Disconnect the alternator and oil pressure gauge from the engine. Loosen the lug nuts on the right front wheel with a lug wrench and raise the vehicle with a floor jack. Support the vehicle with jack stands and disconnect the right front wheel assembly. Detach the splash shield from the right front wheel well.

Disconnect the lower cross member for the suspension with a socket wrench. Remove the exhaust pipe from the catalytic converter and disconnect the distributor from the engine. Disconnect the electrical connector for the water temperature sender gauge and remove the sender gauge from the vehicle. Detach the switch connector for the cold start injector.

Disconnect the radiator hoses and emission control hoses from the engine with a socket wrench. Detach the water bypass pipe and the exhaust gas recirculation valve from the engine. Disconnect the air hose for the throttle body and remove the throttle body. Remove the hoses from the power steering unit if your vehicle is so equipped.

Disconnect the intake manifold from the engine with a socket wrench and discard the gasket. Disconnect the fuel pipe from the injectors and remove the injectors from the engine. Unscrew the spark plugs and remove them from the engine.

Disconnect the camshaft pulley and the No. 1 idler pulley with a socket wrench. Remove the spring from the timing belt tensioner and detach the No. 3 cover for the timing belt. Support the timing belt to prevent it from shifting on the crankshaft pulley.

Disconnect the grommets on the cylinder head cover with a socket wrench. Label the grommets to ensure you install them in their original positions. Remove both camshafts from the engine.

Remove the 10 mounting bolts on the cylinder head with a socket wrench by loosening them in three separate passes. Tap the cylinder head with a rubber mallet to loosen it from the engine block. Place the cylinder head on a clean work surface. Discard the old gasket for the cylinder head. Remove any traces of the gasket from the cylinder head and engine block with a gasket scraper.

Raise the Santa Fe with a jack and support it on a set of jack stands. Locate the oxygen (O2) sensors along the exhaust system.

Pull the electrical connection from the top of the oxygen sensor. Remove the existing sensor with an oxygen sensor socket and ratchet.

Thread the new oxygen sensor into place by hand to avoid the risk of cross threading and damaging the sensor. Torque the sensor to 40 pound-feet with your torque wrench. Push the electrical connector back into place until it clicks.

Repeat the process on the second sensor, if needed. Raise the car slightly with the jack to remove the jack stands. Lower the car to the ground.

Remove the fuel pump fuse from the fuse box under the dashboard. Start the engine and allow the engine to stall. Crank the engine to ensure the fuel lines are empty and replace the fuel pump fuse. Disconnect the cable from the negative battery terminal to prevent the battery from generating sparks during the fuel injector replacement.

Disconnect the cover for the No. 2 cylinder head with a socket wrench. Detach the vacuum hose and fuel tube from the fuel pipe. Disconnect the electrical connectors from the fuel injectors.

Disconnect the fuel pipe from the fuel injectors and detach the fuel injectors from the engine. Remove the spacers from the cylinder head and pull the fuel injectors away from the fuel pipe. Discard the O-ring and grommet for the fuel injectors.

Coat the new O-rings and grommets with light machine oil before installing them onto the new fuel injectors. Coat the mounting surfaces on the fuel pipe with light machine oil. Install the new fuel injectors into the fuel pipe by twisting them into place so that the electrical connectors face away from the fuel pipe. Coat the injector bores in the cylinder head with light machine oil.

Install the spacers and connect the fuel pipe to the cylinder heads. Tighten the mounting bolts for the fuel pipe to 14 foot-pounds with a torque wrench. Attach the fuel line and the PCV hose to the fuel pipe. Connect the cover for the No. 2 cylinder head and tighten its mounting bolts to 7 foot-pounds. Connect the cable for the negative battery terminal with a socket wrench.