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Valve lifters, valve rocker arms, and valve rocker arm supports Valve to the valve guide Valve spring to cylinder head location Engine block bearing cap location and direction Oil pump drive and driven gears REPLACING ENGINE GASKETS Gasket Reuse and Applying Sealant Do not reuse any gasket unless specified. Gaskets that can be reused will be identified in the service procedure. Do not apply sealant to any gasket or sealing surface unless specified in the service Separating Components Use a rubber mallet in order to separate the components. Bump the part sideways in order to loosen the components. Bumping of the component should be done at bends or reinforced areas of the component to Cleaning Gasket Surfaces Use care to avoid gouging or scraping the sealing surfaces. Use a plastic or wood scraper in order to remove all the sealant from the components. Do not use any other method or technique to remove the sealant or the gasket material from Do not use abrasive pads, sand paper, or power tools to clean the gasket surfaces. These methods of cleaning can cause damage to the component sealing surfaces. Abrasive pads also produce a fine grit that the oil filter cannot remove from the engine This fine grit is an abrasive and can cause internal engine damage. Assembling Components Assemble components using only the sealant (or equivalent) that is specified in the service
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
procedure. Sealing surfaces must be clean and free of debris or oil. Specific components such as crankshaft oil seals or valve stem oil seals may require Components requiring lubrication will be identified in the service procedure. Apply only the amount of sealant specified in the service procedure to a component. Do not allow the sealant to enter into any blind threaded holes, as the sealant may prevent Tighten the fasteners to the proper specifications. USE OF ROOM TEMPERATURE VULCANIZING (RTV) AND ANAEROBIC SEALANT Sealant Types The following 2 major types of sealant are commonly used in engines: Anaerobic sealant room temperature vulcanizing (RTV) Anaerobic sealant, which include the following: Gasket eliminator Pipe Threadlock Anaerobic Type Room Temperature Vulcanizing (RTV) Sealant Anaerobic type room temperature vulcanizing (RTV) sealant cures in the absence of air. This Use the following information when using RTV sealant: IMPORTANT: Do not overtighten the fasteners. IMPORTANT: The correct sealant and amount of sealant must be used in the proper location to prevent oil leaks, coolant leaks, or the
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
Do not use RTV sealant in areas where extreme temperatures are expected. These areas The exhaust manifold The head gasket Any other surfaces where a different type of sealant is specified in the service Always follow all the safety recommendations and the directions that are on the RTV Use a plastic or wood scraper in order to remove all the RTV sealant from the components. The surfaces to be sealed must be clean and dry. Use a RTV sealant bead size as specified in the service procedure. Apply the RTV sealant bead to the inside of any bolt holes areas. Assemble the components while the RTV sealant is still wet to the touch, within 3 minutes. Tighten the fasteners in sequence, if specified, and to the proper torque specifications. Anaerobic Type Gasket Eliminator Sealant Anaerobic type gasket eliminator sealant cures in the absence of air. This type of sealant is used NOTE: Do not allow the RTV sealant to enter any blind threaded hole. IMPORTANT: Do not wait for the RTV sealant to skin over. IMPORTANT: Do not overtighten the fasteners.
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
and no sealant or gasket is readily noticeable, then the 2 parts were probably assembled using an Use the following information when using gasket eliminator sealant: Always follow all the safety recommendations and directions that are on the gasket Apply a continuous bead of gasket eliminator sealant to one flange. The surfaces to be sealed must be clean and dry. Anaerobic Type Threadlock Sealant Anaerobic type threadlock sealant cures in the absence of air. This type of sealant is used for Use the following information when using threadlock sealant: Always follow all safety recommendations and directions that are on the threadlock sealant NOTE: Do not allow the sealant to enter a blind hole. The sealant may IMPORTANT: Gasket eliminator sealed joint fasteners that are partially Do not overtighten the fasteners. Apply the gasket eliminator sealant evenly to get a Tighten the fasteners in sequence, if specified, and to After properly tightening the fasteners, remove the
2008 Chevrolet Silverado 1500 2008 ENGINE Engine Mechanical - 4.3L - Sierra & Silverado
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