How to open the valve cover of the engine?

How to open the valve cover of the engine? The following is my personal opinion:

Method of opening engine valve cover:

1. Remove the intake and exhaust manifolds. For overhead valve engines, first remove the valve cover and bracket mounting bolts. Dismantle the rocker shaft and rocker arm in the same installation state;

2. When installing the cylinder head, loosen each bolt gradually in the reverse order of tightening the cylinder head bolts. Never completely loosen the bolts in one position at a time. Generally, the tightening torque of cylinder head bolts should be 0- 12kg one meter;

3. After removing all bolts of the cylinder head, turn the crankshaft by hand. At this time, due to the compression pressure of the cylinder, the cylinder pad will easily leave the surface of the cylinder block;

4. When installing the cylinder head, apply sealant on the cylinder gasket and tighten the cylinder head screws to prevent the cylinder gasket from warping (generally, the cylinder gasket is tightened from the inside out and loosened from the outside in). Million car purchase subsidy