OEM 2008 Cadillac CTS Intake Manifold

2008 Cadillac CTS Intake Manifold Parts and Q&A

• Q: How to replace the intake manifold on 2008 Cadillac CTS?

  A: To replace the Intake Manifold, first, switch the ignition off and then remove the fuel injector sight shield. Then remove the air outlet duct and unplug the Brake Booster Vacuum Hose, purge solenoid valve electrical connector, and purge line from purge solenoid valve. Remove the retainer and disconnect the throttle body electrical connector. Then gap the upper Intake Manifold brace stud , bolt , brace, disconnect the positive crankcase ventilation (PCV) hose from the right bank camshaft cover, the barometric pressure sensor electrical connector, and the Intake Manifold runner control solenoid electrical connector. Take out the bracket bolts that hold injector harness bracket, and we will also remove the left bank ignition coil wiring harness and should have no problems with that, then removing the upper Intake Manifold bolts, and there might be some deflection of the cowl panel that might be needed to pull the right rear bolt. Remove the upper Intake Manifold while it contains the throttle body and in the process of replacing disassemble the Intake Manifold, clean and inspect it. For installation, if necessary, assemble the Intake Manifold, put a new upper Intake Manifold gasket back in place, and then the upper Intake Manifold. Tighten the Intake Manifold mounts in a circular fashion from the middle (long bolts) and finish to 23 n.m (17 lb ft). Join the barometric pressure sensor electrical connector, Intake Manifold runner control solenoid electrical connector, and pcv hose to the right bank camshaft cover. Mount the upper Intake Manifold brace, stud, and bolt compressing the brace bolt to 65 n.m (48 lbft) and brace stud to 10 n.m (89 lb in). Make sure to properly engage the wiring harness connector and then attach the electrical connector to the throttle body, installing the wiring harness retainer, attaching the purge line to the purge solenoid valve, and the purge solenoid valve electrical connector. Lastly, attach the Brake Booster Vacuum Hose to the Intake Manifold, place the spare air outlet duct, and reinstall the fuel injector sight shield.