- Low levels of friction. The lubrication within the seal ensures that the seal lip does not come into contact with the rotary shaft, eliminating the risk of burning or wear.
- Over time, spark plugs can become fouled with carbon deposits, which can hinder their ability to produce a strong spark. This can lead to hard starting, rough idling, and poor performance from your snowblower. By replacing the spark plug with a new one, you can ensure that your snowblower starts up easily and runs smoothly, even in the coldest winter weather.
- Valve oil seals are typically made from a high-quality rubber or silicone material that is resistant to oil and high temperatures. They are designed to fit snugly around the valve stem and create a tight seal that prevents oil from leaking past the valve guide into the combustion chamber. This helps to ensure that the engine runs smoothly and efficiently.
- The design and materials of spark plugs have undergone significant advancements over the years, enhancing their performance and longevity. Modern spark plugs are designed to withstand the extreme temperatures and pressures found within jet engines, ensuring reliable operation even under the most demanding conditions.
- Replacing the crankshaft oil seal is a relatively simple process, but it is important to ensure that the replacement seal is installed correctly to prevent any future issues. To replace the crankshaft oil seal, the engine must be drained of oil, the crankshaft pulley must be removed, and the old seal must be carefully pried out of its housing. The new seal can then be installed using a seal driver tool to ensure that it is properly seated in the housing.
Assembling the oil seal
Polyurethane

oil seal 20 34 7. Its dimensions indicate that it has a 20mm inner diameter, a 34mm outer diameter, and a 7mm width. This size is suitable for a variety of applications and can be easily installed in most types of machinery.
Construction of an Oil Seal
There is a British Standard laid down for the control of synthetic rubbers. BS 3574 (1989) helps to determine shelf life – for instance, Nitrile (NBR) and Polyacrylic (ACM) are Group ‘B’ rubbers and have a 7-year life, whilst Silicone (VMQ) and Fluoroelastomers (Viton®) are Group ‘C’ rubbers and have a 10-year shelf life. PTFE and Leather do not come into this category but like the others should be kept in the original packing for as long as possible away from direct light, dust, and humidity. Ozone, which can also be produced by battery-driven forklift trucks has a very bad effect on synthetic rubbers. Finally, protect the sealing lip – DO NOT hang the seals on nails, wire etc.
Regular inspection and maintenance of rubber valve cover gaskets are essential to identify signs of wear, damage, or leakage. Proper replacement of worn or damaged gaskets is crucial for maintaining the integrity and performance of the engine. Adhering to recommended service intervals and using high-quality replacement components are essential for optimizing the performance and longevity of the vehicle's engine.