SOURCE: Kia Technician Times
TITLE: 4WD Control Vacuum Line
APPLIES TO: XXXXX XXXXX
In some cases moisture has entered the vacuum system, and vacuum lines have become corroded, plugged, or have developed a leak.
Disconnect and remove battery and battery tray. Leaving ground cables attached, remove clamp bracket from battery tray bottom and move out of the way. Remove plastic air resonator and disconnect throttle cable (plus A/T control cable if equipped). Disconnect MAF and IAC connectors, and 6 mm bolt holding DLC and MAF brackets to air cleaner housing. Disconnect air intake tube from throttle body, and MAF sensor from air filter housing. Remove tube, duct, and sensor assembly and set aside. Loosen rear engine hanger bracket and front surge tank support bracket. Disconnect coolant lines from throttle body or (alternatively) remove throttle body from surge tank but leave coolant lines attached. Remove surge tank. Cover intake to prevent anything from falling in. Mark steering column shaft and coupling for later reference (see photo 1), loosen clamps on both sides of the coupling and slide coupling back on intermediate shaft, disconnecting it from steering column.
Starting from the drivers side, free up old line and move it up until it clears the cylinder head at the location of rear engine hanger. Move and "snake" the line carefully as required to free it up and pull it out. Install the new line the same way, and assemble everything in reverse order. Observe reference mark on steering shaft when reassembling. Test drive and checkXXXXXoperation.