Chevrolet 22503678 Engine Exhaust Manifold

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When dealing with exhaust manifold removal and installation for various engine types, it's essential to follow specific steps and precautions. To begin, disconnect the exhaust pipe or crossover pipe by removing the nuts from the manifold studs and slide the collar or pull the flanged portion of the exhaust pipe or crossover away, sometimes requiring loosening the crossover pipe on the other side for clearance. Parts that obstruct access should be removed, which might include hot air shrouds, accessory brackets, and even the steering shaft on some vehicles. Additionally, disconnect the oxygen sensor if present. Next, bend back any locking tabs on the mounting nuts, soak them with solvent, and then proceed to loosen and remove them, ultimately allowing the manifold and seal to be removed. Ensure the block's surface is cleaned thoroughly. For 196, 231, 252, and 350 Buick Engines, the process involves raising the car, disconnecting the exhaust crossover pipe, and removing various components depending on the specific side you're working on. The manifold-to-cylinder head bolts are then removed, allowing for the manifold's removal. Installation follows in reverse order, using lockbolts. For 305 and 350 Chevrolet Engines, exhaust manifold removal on the left side requires disconnecting the exhaust pipe, among other steps, while removal on the right side might necessitate removing the right front wheel for access. Installation involves replacing the manifold with a new gasket and tightening the bolts in a specified sequence. For 350 and 403 Oldsmobile Gasoline Engines, the process involves disconnecting the exhaust pipes, unbolting the exhaust manifolds, and removing various components, including hot air shrouds. Installation is performed in the reverse order of removal. For 263 and 350 Oldsmobile Diesel Engines, the steps include draining the cooling system, removing the air cleaner, disconnecting hoses and lines, and removing the manifold and adapter seal. Clean the gasket surfaces thoroughly and use sealers when installing gaskets. Tighten bolts to specified torques. For 265 and 301 Pontiac Engines, both left and right sides involve disconnecting exhaust pipes, removing manifold bolts, and cleaning gasket surfaces. The installation process includes using new gaskets and tightening bolts evenly. For the 1986-87 Oldsmobile 307 Engine, left-side removal necessitates various steps, including prying bolt locking tabs, unclamping the exhaust pipe, and disconnecting the intermediate steering shaft. Right-side removal requires disconnecting the oxygen sensor lead and removing the crossover pipe. Installation involves cleaning gasket surfaces and securing bolts in stages, among other steps. In all cases, proper torque and sealing procedures should be followed to prevent leaks, and any sensors or components removed during the process should be reinstalled correctly.