Cleanliness and care
An automobile engine is a combination of many machined, honed, polished, and lapped surfaces with tolerances measured in ten-thousandths of an inch. Cleanliness and care are important when servicing internal engine components. A thick film of machine oil is applied to the rubbing surfaces during assembly to protect and lubricate the surfaces during the initial period of operation. Proper cleaning and protection of machined surfaces and rubbing parts is part of the repair procedure. It is considered standard repair shop practice, even if not specifically stated. After valve train components are removed for servicing, they should be maintained in good condition. They should be installed in the same locations and with the same mating surfaces as before removal. Before performing major work on the engine, the battery cables should be disconnected. Failure to disconnect the cables may result in damage to the cable harnesses or other electrical components.
Maintenance without dismantling from the engine
Caution! Disconnect the negative battery cable before removing or installing any electrical components or when tools or equipment may come into contact with exposed electrical terminals. Disconnecting the cable will help prevent personal injury and mechanical damage. It is also necessary that the ignition key is in the "B" position unless otherwise noted.
Note: When removing the air filter, it is necessary to close the intake port. This measure will protect against accidental entry of foreign material that can enter the cylinder through the intake port and cause severe damage when starting the engine.
[The material was created based on information from the website: «chevyman.ru»]