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What are Oil Seals, and How Do They Work?
In terms of size, oil seals are available in a wide range of dimensions to suit different shaft diameters and housing sizes. It is crucial to select the correct size seal to ensure a proper fit, as using an improperly sized seal can lead to leaks and premature wear.
25 40 7 oil seal

Remove the cylinder head (See How to remove a cylinder head ), carefully peeling off the old gasket from the head or block. Make sure no dirt or carbon falls into the engine.
Stainless steel sheet
(JIS* SUS304)
There are several materials used to manufacture oil seals. They are discussed below.
Different Type Rotary Shaft Oil Seal