The mating surfaces of the head or block must be perfectly clean, flat and smooth.
Car engine oil seals are essential components that prevent oil leaks and maintain proper lubrication within the engine. They play a crucial role in preserving the integrity and efficiency of the engine, contributing to its overall performance and longevity. High-quality engine oil seals are designed to withstand the demanding conditions of automotive operation, ensuring reliable sealing solutions for critical engine components.
On engines that rotate anti clockwise (viewed from the front) the pulley bolt unscrews clockwise.
Describe difference between mechanical seal and oil seal – Whether it is a mechanical seal or oil seal, it prevents the fluid seeping the liquid to other parts of the machine, or it keeps the rotating parts lubricated.
Replacing a rocker or cam-cover gasket
Explore All About Industrial Oil Seals
If the manifolds have been removed, refit them with new gaskets (See Exhaust manifold gasket replacement ).
Why use NOK-CN factory-made oil seals?

m20 valve cover gasket. Once the cover is removed, the old gasket can be easily peeled off and replaced with a new one.
Choosing the correct type for your application
These seals are designed to fit snugly around the shaft of the machine, preventing oil from leaking out while also keeping dirt, dust, and other contaminants from entering.
TOYOTA / NISSAN/ HONDA / Peugeot