OEM Cadillac DTS Intake Manifold

Cadillac DTS Intake Manifold Parts Questions & Experts Answers

• Intake Manifold
  19330172
  Q: How to replace the intake manifold on Cadillac DTS?

  A: To replace the Intake Manifold, first, you should remove the fuel injector sight shield cover and the air cleaner outlet. Remove the front and rear ignition coil module engine harness electric connectors and the front and rear fuel injectors engine harness electric connectors. Separate the positive crankcase ventilation (PCV) foul air tube quick connect fitting from the right camshaft cover and the pcv fresh air tube quick connect fitting from the camshaft cover. Remove the fuel feed line quick connect fitting at the Fuel Rail. Reposition the radiator surge tank inlet hose/ pipe clamps, pull the surge tank inlet hose or pipe from both the surge tank and engine fitting. Unfasten the pushnuts that hold the surge tank inlet hose/pipe to the Fuel Rail studs, followed by the Fuel Rail bracket nut, fuel rail studs, and the Fuel Rail. Lose the plenum duct clamp screw at water pump housing, disengage the Intake Manifold bolts, and leave the power steering to the side before the removal of the Intake Manifold. Remove the pcv foul air tube from where it is connected to the Intake Manifold quick connect fitting. Throw away the old seals and clean and check the Intake Manifold. For installation, you have to install new Intake Manifold seals and attaching pcv foul air tube quick connect fitting on the Intake Manifold and then pcv foul air tube with retaining features. Slightly grease the inside perimeter of the rubber plenum duct on the water pump housing and install the Intake Manifold and tighten the Intake Manifold bolts. Fasten intake bolts in specified sequence to 10nm (89 lb in) and ensure the Intake Manifold is fully inserted into plenum duct. Reinstall the Power Steering Pump, and tighten the plenum duct clamp screw to 2.75 nm (24 lb in). Use clean engine oil to lubricate the fuel injector lower o-ring seals and then fit the Fuel Rail and tighten the Fuel Rail studs to 10 nm (89 lb in). Install the Fuel Rail bracket nut and tighten with force of 10 nm (89 lb in), or coil heater cord tabs if equipped, and the harness retainer at the Fuel Rail stud. Refit the surge tank inlet hose/pipe to the Fuel Rail studs and engine fitting using pushnuts and clamping. Join the fuel feed line quick connect fitting at the Fuel Rail, the pcv fresh air tube quick connect fitting to the camshaft cover and the pcv foul air tube quick connect fitting to the right camshaft cover. Finally, reconnect rear and front fuel injectors and ignition coil module engine harness electrical ends, then reinstall the air cleaner outlet duct and fuel injector sight shield cover.