1, engine cooling water, will involve cylinder head accessories, such as carburetor or EFI accessories, pumps, pipes, etc., and try to untie its circuit;

2. If it is an overhead valve, remove the upper cover, remove all bolts on the cover, and confirm that the bolts have been removed. Tap the cylinder head lightly with a hammer, pry it open with a starter and put it in a safe position;

3. Remove the cylinder gasket, gently brush the surface of the cylinder block (cylinder head) with a copper wire brush, confirm that the new cylinder gasket is the same model, put it away, and tighten the cylinder head in reverse order, paying attention to tighten the middle first, then tighten the two sides to ensure the cylinder head is flat.

Cylinder head bolts should be tightened evenly and alternately step by step to finally ensure the tightening torque, and the valve clearance should be readjusted after installation. Engine cylinder gasket, referred to as cylinder gasket, is an elastic seal between cylinder block and cylinder head. Because it is impossible to be absolutely flat between the cylinder block and the cylinder head, it is necessary to have a cylinder pad to prevent high-pressure gas, lubricating oil and cooling water from escaping between them.

If you have no experience in repairing cars, you'd better not do it. Suggest going to the auto repair shop to handle it. The cylinder gasket is located between the cylinder head and the cylinder block, also called cylinder bed. Its function is to fill the tiny pores between the cylinder block and the cylinder head and ensure the good sealing of the joint surface, thus ensuring the sealing of the combustion chamber and preventing the air leakage of the cylinder and the water jacket.