Genuine Oldsmobile Omega Exhaust Manifold

Oldsmobile Omega Exhaust Manifold Parts Questions & Experts Answers

• Exhaust Manifold
  10087655
  Q: How to remove and install exhaust manifolds in V6 engine on Oldsmobile Omega?

  A: If the engine has been removed from the car, disregard the following steps which do not apply. First, if the vehicle is equipped with air conditioning, carefully examine the routing of the A/C hoses and the mounting of the compressor, as it may be possible to remove the exhaust manifolds without disconnecting the A/C system; if in doubt, consult a certified dealer or refrigeration specialist to have the system depressurized, and do not disconnect the A/C hoses while under pressure. Next, disconnect the negative battery cable and the carburetor hot air pipe routed from the right exhaust manifold to the air cleaner. Mark each spark plug wire with coded tape before removing them, ensuring not to mix up the order. Remove the air cleaner and the PULSAIR bracket bolt from the right rocker cover, along with the system's plumbing from both exhaust manifolds, and any remaining hoses. Raise the front of the car and support it on jackstands, then disconnect the left exhaust pipe from the exhaust manifold, using penetrating oil if the bolts are tight. The EFE valve, mounted between the right exhaust manifold and exhaust pipe, can be disconnected by tightening the upper manifold flange nuts until the bolts break, allowing the exhaust pipe to be removed. If bolt locking strips are present, use a screwdriver to pry them away from the exhaust manifold bolt heads for easier access. Remove the exhaust manifold end bolts first, followed by the center bolts, and lift the manifold away from the engine. Before installing the exhaust manifolds, clean the mating surfaces on the Cylinder Heads and exhaust manifolds, ensuring all leftover gasket material is removed. Place new gaskets into position on the cylinder head, using a thin film of sealer to hold them in place, then install the manifold and tighten the bolts gradually in sequence until they are all torqued to specifications. Reinstall the remaining components in reverse order of removal, using new exhaust pipe bolts when connecting the right exhaust manifold to the exhaust pipe. For later V6 models with slip joints in the exhaust crossover pipe, take care to avoid damage when tightening the nuts; insert the right side of the pipe into its manifold and install the nuts finger tight, then insert the left side and secure the lower nut before tightening the upper nut and both right side nuts. Finally, start the engine and check for exhaust leaks at the manifold and exhaust pipe connections.