How do you change head gasket on Nissan urvan?

To change the head gasket on a Nissan Urvan, start by disconnecting the battery and removing the necessary components, including the intake and exhaust manifolds, to access the cylinder head. Carefully unbolt the cylinder head, ensuring you follow a proper sequence to avoid warping. Clean the mating surfaces thoroughly, place the new gasket, and reassemble in reverse order, making sure to torque the bolts to the specified settings. Finally, refill the coolant, reconnect the battery, and start the engine to check for leaks.