Chevrolet Sonic Repair Manual: Replacing Engine Gaskets

Gasket Reuse and Applying Sealants

• 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 called out in the service information.

Separating Components

• Use a rubber mallet to separate components.
• Bump the part sideways to loosen the components.
• Bumping should be done at bends or reinforced areas to prevent distortion of parts.

Cleaning Gasket Surfaces

• Remove all gasket and sealing material from the part using a scraping tool.
• Care must be used to avoid gouging or scraping the sealing surfaces.
• Do not use any other method or technique to remove sealant or gasket material from a part.
• 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 oil.
• This grit is abrasive and has been known to cause internal engine damage.

Assembling Components

• When assembling components, use only the sealant specified or equivalent in the service procedure.
• Sealing surfaces should be clean and free of debris or oil.
• Specific components such as crankshaft oil seals or valve stem oil seals may require lubrication during assembly.
• Components requiring lubrication will be identified in the service procedure.
• When applying sealant to a component, apply the amount specified in the service procedure.
• Do not allow the sealant to enter into any blind threaded holes, as it may prevent the bolt from clamping properly or cause component damage when tightened.
• Tighten bolts to specifications. Do not overtighten.