The role of valve seals

You can prevent the oil into the intake and exhaust pipes, resulting in loss of engine oil, gasoline and air mixture to prevent gases and emissions leakage, prevent engine oil into the engine combustion chamber. Engine valve valve padlock seals is one of the important parts group, at a high temperature in contact with gasoline and oil. Therefore requires the use of heat resistance and oil resistance of the material, generally made of rubber is a fluorine.
Valve seal structure
Installation and replacement of valve seals
(A) the valve stem oil seal removal steps:
① Remove the camshaft and hydraulic lifters, and kept face down, the operation should note tappets are not interchangeable. Remove the spark plug with a spark plug wrench 3122B, adjusted to the corresponding cylinder piston top dead center, the pressure hose VW653 / 3 spark plug screwed into the threaded hole.
② the spring compression tool with bolts attached to the cylinder head 3362. The associated valve adjusted to the correct position, and then the pressure hose to the air compressor (air pressure of at least 600KPA). Threaded mandrel and thrust pieces down the pressure valve spring, remove the spring.
③ can tap Remove the air lock valve spring retainer block. Tools pull valve stem seals 3364.
(2) the installation of the valve stem seals.
The plastic package to the valve stem to prevent damage to the new valve stem seals. Kouqing coated in oil plastic strap seal lip. The 3365 oil on package to the tool, and then slowly push the valve conduits. Special note: Install the intake and exhaust in front of the valve stem must be coated with a layer of oil.