Kia 353043CAB0 Pipe-Delivery Upper

Depressurize the fuel and disconnect the battery. Remove the engine cover, air intake duct, and filter housing. Remove the upper intake manifold. Disconnect the high-pressure fuel pipe and line from the fuel rail. Disconnect the electrical connectors, then take out the rail bolts, retaining clips, and injectors. Replace the seals, grommets, and O-rings. Remove the old Teflon sealing ring and upper O-ring from each injector. Clean the seal groove and injector shaft. Install a new Teflon seal. Lubricate and install a new upper O-ring. Clean injector bores and insert injectors into the fuel rail. Install new retaining clips. Install injectors and fuel rail assembly on the cylinder head. Tighten new fuel rail bolts.

If needed, disconnect the fuel tube from the fuel rails by pulling out the retaining clip and separating the supply tube, ensuring to replace the 0-ring with a new one.