OEM Cadillac Seville Intake Manifold

Cadillac Seville Intake Manifold Parts Questions & Experts Answers

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

  A: To replace the Intake Manifold, first remove the 2 nuts from the Intake Manifold sight shield and then pry off the sight shield from the engine. Unplug the coil module connectors from the coil modules of the camshaft covers, the PCV Valve from the camshaft cover, the PCV fresh air tube from the camshaft cover, the fuel regulator vacuum tube, and the vacuum tubes of the air solenoid. Next, one has to remove the fuel inlet and return quick-connect fittings at the Fuel Rail, remove the Fuel Rail bracket retaining nut at the rear lift bracket, and remove the 8 electrical connectors from the 8 Fuel Injectors. Unbolt and then lift the entire Fuel Rail with its associated injectors out of the intake. Clear the plenum duct clamp at the rear of the Intake Manifold and then remove the 10 bolts connecting the Intake Manifold to the cylinder heads, lifting the Intake Manifold while pulling up in the front. Clean and check the Intake Manifold and oil the inside of the rubber plenum duct with minimal grease, then clean any debris from the Cylinder Head or Intake Manifold. Mount new gaskets to the Intake Manifold and check the PCV Valve hose against the fitting at the front of the Intake Manifold, which must be well-clipped in place before installing by resting the rear in the plenum duct and the front on the cylinder heads. Mount the 10 bolts holding the Intake Manifold onto the cylinder heads with a circular outward pattern starting from the center to a 10 nm. Secure the plenum duct to the back of the Intake Manifold and the plenum duct clamp to 2.25 nm. Prevent damage to the o-ring seals by not forcing the injectors into position, and cover the insert the accompanying Fuel Rail and injector assembly to put it on a given plug in the Intake Manifold, delivering it into the right position from a simultaneous squeeze. Install 4 bolts to fix the Fuel Rail to the Intake Manifold, and tighten them up to 10 nm. Attach the 8 electrical connectors to the fuel injectors, mount the engine coolant heater wire onto the Fuel Rail studs if applicable, and mount the 2 pushnuts. Install the Fuel Rail bracket retaining nut to the rear lift bracket and screw it to 10 nm. Connect the quick connect fittings to the Fuel Rail, the vacuum tubes to the air solenoid, the fuel regulator vacuum tube, the PCV fresh air tube to the camshaft cover, the PCV Valve to the camshaft cover, and coil module connectors to the coil modules in the camshaft covers. Finally, put the Intake Manifold sight shield onto the engine and fix the 2 sight shield nuts on it, fixing them in position by using 3 nm of tightness.