What is a car valve oil seal
The valve oil seal is a type of oil seal usually made by vulcanizing an outer frame and fluororubber together. A self-tightening spring or steel wire is installed at the radial opening of the oil seal to seal the engine valve guide rod. It is an important part of the engine valve assembly. Valve oil seals can prevent engine oil from entering the intake and exhaust pipes and avoid oil loss. It can also prevent the leakage of a mixture of gasoline, air and exhaust gas
The valve oil seal is a type of oil seal usually made by vulcanizing an outer frame and fluororubber together. A self-tightening spring or steel wire is installed at the radial opening of the oil seal to seal the engine valve guide rod.
It is an important part of the engine valve assembly. Valve oil seals can prevent engine oil from entering the intake and exhaust pipes and avoid oil loss. It can also prevent the leakage of a mixture of gasoline, air and exhaust gas, and stop engine oil from entering the combustion chamber.
Because it comes into contact with gasoline and engine oil at high temperatures, materials with excellent heat resistance and oil resistance, such as fluororubber, need to be used.
An oil seal is a sealing component used in machinery to seal oil. It can separate the parts of the transmission that require lubrication from the output part to prevent the leakage of lubricating oil. Valve oil seals are a type of oil seal.
When choosing the material for valve oil seals, special attention should be paid to the working temperature range of nitrile rubber oil seals being 40 to 120 degrees Celsius, acrylic rubber 30 to 180 degrees Celsius, and fluorine rubber 25 to 300 degrees Celsius. The lip temperature of an oil seal is generally 20 to 50 degrees Celsius higher than that of the working medium. Therefore, it is necessary to select the appropriate oil seal material based on the actual situation to ensure that it can work normally and play a good sealing role in the corresponding environment.
The main manifestations of valve oil seal failure are oil leakage into the combustion chamber, causing problems such as blue smoke from exhaust and abnormal oil consumption. Timely maintenance is required. Piston ring jamming, aging of valve oil seals, and damage to exhaust valves are common causes. Youdaoplaceholder0.
Core symptoms
Youdaoplaceholder0 Blue smoke from exhaust : This is particularly noticeable during cold starts, as engine oil enters the combustion chamber and burns, generating blue smoke.
Youdaoplaceholder0 Abnormal oil consumption : The oil level drops significantly after driving thousands of kilometers.
Youdaoplaceholder0 Power decline : Carbon deposits clog both sides of the valves, resulting in reduced intake efficiency.
Youdaoplaceholder0 Spark plug carbon deposits : Contaminated by engine oil, presenting a black and greasy appearance.
Cause analysis
Youdaoplaceholder0 Valve oil seal aging : The rubber parts harden over time, and the sealing performance declines (they are prone to damage after 150,000 kilometers).
Youdaoplaceholder0 Exhaust valve failure : pressure imbalance in the crankcase ventilation system, oil vapor is sucked into the combustion chamber.
Youdaoplaceholder0 Piston ring jamming : Carbon deposits clog the oil return hole, losing the oil-scraping function (more common in medium and high-mileage vehicles).
Solution
Youdaoplaceholder0 replace original factory parts
Give priority to replacing the valve cover assembly (including an integrated design of oil seal and exhaust valve).
Youdaoplaceholder0 repair without disassembly
Use PNF type cleaners to dissolve carbon deposits and restore the elasticity of piston rings (suitable for vehicles within 100,000 kilometers).
Youdaoplaceholder0 Daily maintenance
Regularly clean the fuel lines with fuel additives (once every 10,000 to 20,000 kilometers).
Select fully synthetic engine oil that complies with ACEA C3 standards.
Risk Warning
Avoid long short-distance driving (a one-way trip of less than 5 kilometers can easily aggravate carbon deposits) and increasing the engine oil level without authorization.
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