Q: How to remove and install a cylinder head in V6 engine on Pontiac Fiero?
A: Raise the vehicle and place it securely on jackstands, then remove the engine block drain plug to drain the coolant. After lowering the vehicle, remove the intake manifold and exhaust crossover pipe, followed by the alternator and bracket. Remove the oil level indicator tube and rocker arm cover, then loosen the rocker arms to swing them out of the way before removing the pushrods, storing them systematically for reinstallation. Remove the cylinder head bolts by reversing the tightening sequence and take off the cylinder head. If installing a new cylinder head, transfer components from the old head, ensuring all gasket surfaces are clean and free of debris, and recondition the bolt threads. Position the gasket over the locating dowels, place the cylinder head over the gasket, coat the bolt threads with sealer, and install the bolts, tightening them in the proper sequence to the specified torque in three steps. Install the pushrods, ensuring the lower ends are in the lifter seats, then loosely install the rocker arm nuts and adjust the valve lash. Install the intake manifold and gaskets, tightening all bolts to the specified torque, attach the oil level indicator tube bracket, install the heat stove pipe and air supply pipe, and then attach the alternator bracket and stud. Install the exhaust pipe and crossover pipe, and fill the cooling system with coolant, noting not to add coolant if the rear cylinder head is also being removed. For the rear, repeat the process of raising the vehicle and draining the coolant, disconnect the exhaust pipe from the manifold, and remove the cruise control servo bracket if equipped. Remove the intake manifold and exhaust crossover pipe, loosen the rocker arm nuts to remove the pushrods, and then loosen the head bolts by reversing the tightening sequence to remove the cylinder head. Transfer components from the old head if a new one is being installed, clean all gasket surfaces, and place the new gasket in position. Position the cylinder head over the gasket, coat the bolt threads with sealer, and install the bolts, tightening them in the proper sequence to the specified torque in three steps. Install the pushrods, ensuring the lower ends are in the lifter seats, loosely install the rocker arm nuts, and adjust the valve lash. Install the intake manifold and gaskets, the exhaust crossover pipe, and the cruise control servo bracket. Finally, raise the vehicle again to connect the exhaust manifold to the exhaust pipe, lower the vehicle, adjust the drivebelts, and fill the cooling system.