2. Position the camshaft. The camshaft is located at the top of the engine block, and it is responsible for opening and closing the valves. To position the camshaft, you will need to use a timing belt or chain. The timing belt or chain is connected to the crankshaft, and it ensures that the camshaft is synchronized with the pistons.
3. Install the cylinder head. Once the camshaft is in position, you can install the cylinder head. Be sure to use a new head gasket, and torque the cylinder head bolts to the proper specifications.
4. Install the pushrods, rocker arms, and valve covers. Reinstall the pushrods, rocker arms, and valve covers in reverse order of removal.
5. Adjust the valve clearances. The valve clearances are the gaps between the valves and the camshaft. They need to be adjusted to ensure that the valves open and close properly. You can adjust the valve clearances by using a feeler gauge.
6. Start the engine. Once the valve clearances are adjusted, you can start the engine. Be sure to check for leaks, and make sure that the engine is running smoothly.