GM Service Manual Online
For 1990-2009 cars only

Throughout this section, correct cleaning and protection of machined surfaces and friction areas is a vital part of the service procedure and is considered to be a standard workshop practice even if it is not specifically stated. When any of the internal engine parts are serviced, care and cleanliness is important.

When components are removed for service, they should be marked, organized or retained in a specific order for assembly. For further information, refer to Separating Parts. At the time of installation, components should be installed in the same location and with the same mating surface as when removed.

Any engine is a combination of many machined, honed, polished and lapped surfaces with tolerances that are measured in hundredths of millimeters. These surfaces should be covered or protected to avoid component damage.

A liberal coating of clean engine oil should be applied to all friction areas during component assembly. Proper lubrication of engine components during assembly will protect and lubricate friction surfaces during the initial engine start-up.