Service Information

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.

To remove the sealant or the gasket material, refer to Replacing Engine Gaskets : LE5 or LE9 .

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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.

•	Room temperature vulcanizing (RTV) sealant hardens when exposed to air. This type sealer is used where 2 rigid parts, such as the lower crankcase and the engine block, are assembled together.

•	Do not use RTV sealant in areas where extreme temperatures are expected. These areas include: exhaust manifold, head gasket, or other surfaces where a gasket eliminator is specified.

To remove the sealant or the gasket material, refer to Replacing Engine Gaskets : LE5 or LE9 .

•	Apply RTV to a clean surface. Use a bead size 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 damage when the bolt is tightened.

•	Assemble components while RTV is still wet, within 3 minutes. Do not wait for RTV to skin over.

•	Anaerobic gasket eliminator hardens in the absence of air. This type sealer is used where two rigid parts (such as castings) are assembled together. When two rigid parts are disassembled and no sealer or gasket is readily noticeable, the parts were probably assembled using a gasket eliminator.

To remove the sealant or the gasket material, refer to Replacing Engine Gaskets : LE5 or LE9 .

•	Apply a continuous bead of gasket eliminator to one flange. Surfaces to be resealed must be clean and dry.

•	Spread the sealer evenly with your finger to get a uniform coating on the sealing surface.

•	Do not allow the sealer to enter any blind threaded holes, as it may prevent the bolt from clamping properly or cause damage when tightened.

Note: Anaerobic sealed joints that are partially torqued and allowed to cure more than five minutes may result in incorrect shimming and sealing of the joint.

Do not allow the sealer to enter any blind threaded holes, as it may prevent the bolt from seating properly or cause damage when the bolt is tightened.

•	After properly tightening the fasteners, remove the excess sealer from the outside of the joint.

Use of Room Temperature Vulcanising (RTV) and Anaerobic Sealant - LE5 or LE9

Pipe Joint Compound

RTV Sealer

Anaerobic Sealer