Q: How to disconnect and remove the intake manifold and its components in V6 engine on Oldsmobile Cutlass?
A: Disconnect the battery ground cable, drain the radiator, and remove the air cleaner. Disconnect the upper radiator hose and heater hose at the manifold, then disconnect the accelerator linkage at the carburetor, the linkage bracket at the manifold, and the cruise control chain if applicable. Disconnect the booster vacuum pipe at the manifold, the fuel line at the carburetor (plug the line and catch any spillage), the transmission vacuum modulator line if applicable, the idle stop solenoid if applicable, the distributor wires (mark each wire with tape for ease of reassembly), the temperature sending unit wire, and vacuum hoses from the distributor, TVS, and EFE valve pipe at the carburetor (mark hoses with tape for ease of reassembly), as well as the coolant by-pass hose at the manifold. Remove the distributor cap, mark the rotor position, and remove the rotor to access the left intake manifold "six-lobed socket" head bolt, then remove this bolt with GM tool J-24394 or equivalent. Remove the accelerator linkage springs and compressor top bracket if applicable, followed by the remaining intake manifold bolts (there are 10). Lift the intake manifold, complete with carburetor, from the engine without prying on the mating edges to avoid damage. If replacing the intake manifold, transfer the carburetor and its attaching bolts, temperature or oil sending unit, water outlet and thermostat (using a new gasket), EGA valve (using a new gasket), heater hose, and water pump hose adapter fittings, as well as the carburetor choke assembly. Before installing the manifold, cover the engine cavity with lint-free rags and clean the engine block, cylinder heads, and manifold gasket surfaces, ensuring all old gasket material and sealing compound are removed. Place the new intake manifold gasket and rubber manifold seal in position at the front and rear rails of the cylinder block, ensuring the pointed end of the seal fits snugly against the block and head. Apply ATV or equivalent sealant to the ends of the seals and Copper-coat gasket sealant to the intake manifold gasket. Install the one-piece manifold gasket and carefully set the manifold in place, locating it on the engine block dowel pins, then apply Teflon pipe sealant (not tape) to the manifold bolt threads. Install the manifold-to-cylinder head attaching bolts and the rest of the bolts in the specified sequence, tightening them to the torque specifications. Connect or re-install the components in the reverse order of removal, reconnect the battery cable, close the drain plug, and refill the cooling system. Start the engine and check for leaks, adjusting the ignition timing and carburetor idle as necessary.