[High Pressure Fuel Line]

Turn the ignition switch OFF, and then remove battery (-) cable.
Release the residual pressure in fuel line.
(Refer to the Fuel Delivery System - Repair Procedures - "RELEASE RESIDUAL PRESSURE IN FUEL LINE ").
Disconnect the Engine Coolant Temperature Sensor connector (A).

Fig 1: Locating Engine Coolant Temperature Sensor Connector
Courtesy of KIA MOTORS AMERICA, INC.
Disconnect the ignition coil connector (A) and CMPS connector (B).
Unfasten the harness bracket (C) and Make a gap for removing high pressure fuel pipe by moving the bracket (C).

Fig 2: Locating Ignition Coil Connector, CMPS Connector And Harness Bracket
Courtesy of KIA MOTORS AMERICA, INC.
Remove the vacuum pipe mounting bolt (A)
Remove the vacuum pipe & high pressure fuel pipe function block mounting bolt (B).
Remove the high pressure fuel pipe flange nut (C).
High pressure fuel pipe flange nut :

26.5 ~ 32.4 N.m (2.7 ~ 3.3 kgf.m, 19.5 ~ 23.9 lb-ft)

High pressure fuel pipe function block mounting bolt :

9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)

Fig 3: Locating Vacuum Pipe Or High Pressure Fuel Pipe Function Block Mounting Bolt, High Pressure Fuel Pipe Flange Nut And Vacuum Pipe Mounting Bolt
Courtesy of KIA MOTORS AMERICA, INC.
Remove the high pressure fuel pipe flange nut from the high pressure fuel pump with the special service tool (A).[SST No.: 09314-3Q100 or 09314-27130]
High pressure fuel pipe flange nut :

26.5 ~ 32.4 N.m (2.7 ~ 3.3 kgf.m, 19.5 ~ 23.9 lb-ft)

Fig 4: Removing High Pressure Fuel Pipe Flange Nut From High Pressure Fuel Pump With Special Service Tool
Courtesy of KIA MOTORS AMERICA, INC.
Remove the high pressure fuel pipe (A).

Fig 5: Removing High Pressure Fuel Pipe
Courtesy of KIA MOTORS AMERICA, INC.

Fig 6: Locating High Pressure Fuel Pipe
Courtesy of KIA MOTORS AMERICA, INC.