Is it necessary to glue the valve cover gasket?

Replacement of bonnet gasket does not require sealant. Oil leakage from the valve cover gasket will lead to poor air tightness of the engine, which will affect the normal operation of the engine, and even lead to engine scrapping in severe cases. The way to solve the oil leakage of the bonnet gasket is to replace the bonnet gasket. The replacement steps of the valve cover gasket are as follows: 1. First, remove the bonnet screws from both sides to the middle diagonal, pry the bonnet loose with a grooving knife, and take out the bonnet gasket; 2. Clean the valve cover with cleaning agent. Clean the contact surface between the valve cover and the cylinder head. Install the valve cover gasket with sealant and tighten the screws diagonally from the middle to both sides. 3. During the operation of replacing the paper pad, it should be noted that the two joint surfaces of the engine and the valve cover should be wiped clean with the original paper pad, and both sides of the paper pad should be evenly coated with butter, aligned with the positioning column, covered with the cover, and the valve cover should be tightened evenly. The valve cover is a fixing bolt. Million car purchase subsidy