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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.

Pipe Joint Compound

Note: Three types of sealer are commonly used in engines. These are RTV sealer, anaerobic gasket eliminator sealer, and pipe joint compound. The correct sealer and amount must be used in the proper location to prevent oil leaks. DO NOT interchange the 3 types of sealers. Use only the specific sealer or the equivalent as recommended in the service procedure.

    • Pipe joint compound is a pliable sealer that does not completely harden. This type sealer is used where 2 non-rigid parts, such as the sump and the engine block, are assembled together.
    • Do not use pipe joint compound in areas where extreme temperatures are expected. These areas include: exhaust manifold, head gasket, or other surfaces where gasket eliminator is specified.
    • Follow all safety recommendations and directions that are on the container.
        To remove the sealant or the gasket material.
    • Apply the pipe joint compound to a clean surface. Use a bead size or quantity as specified in the procedure. Run the bead to the inside of any bolt holes. Do not allow the sealer to enter any blind threaded holes, as it may prevent the bolt from clamping properly or cause component damage when the bolt is tightened.
    • Apply a continuous bead of pipe joint compound to one sealing surface. Sealing surfaces to be resealed must be clean and dry.
    • Tighten the bolts to specifications. Do not overtighten.
   


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