Silicone (VMQ) Oil Seals
If necessary, lever it gently with a broad screwdriver blade, but take care not to bend the flange or damage the head.
Prepping for Oil Seal Installation
Metal cased design
Types of oil seals
In addition to its excellent temperature resistance, it is also resistant to ozone, light, and weather conditions. Silicone can be typically found in the food and medical industry as well as in hydraulics and pneumatics. It is often the preferred material for o-rings, moulded parts and flat seals but is also commonly used for electric insulators due to the material’s translucency and flexibility.
Even though it’s better than other materials in terms of toughness and wear time, it is preferably used in dry-running applications. The salient demerit of this material is its cost.
On some engines you have to remove the clutch-housing cover to reach the rear nuts.
Valve stem seal

fkm tc oil seal. This durability helps to reduce maintenance costs and downtime, making FKM TC oil seals a cost-effective sealing solution for many industrial applications.

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It is possible to get custom-made seals manufactured at reasonable rates from good-quality manufacturers if the readymade seal specification doesn’t meet the requirement.