Pipe Joint Compound
Important: 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 two non-rigid parts, such as the oil
pan 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, refer
to Replacing Engine Gaskets. |
| | Notice: Do not allow the RTV sealant to enter any blind threaded hole. RTV sealant
that is allowed to enter a blind threaded hole can cause hydraulic lock of
the fastener when the fastener is tightened. Hydraulic lock of a fastener
can lead to damage to the fastener and/or the components. Hydraulic lock of
a fastener can also prevent the proper clamping loads to be obtained when
the fastener is tightened. Improper clamping loads can prevent proper sealing
of the components allowing leakage to occur. Preventing proper fastener tightening
can allow the components to loosen or separate leading to extensive engine
damage.
|
| • | 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. |
| • | 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. |
RTV Sealer
| • | Room Temperature Vulcanizing (RTV) sealant hardens when exposed
to air. This type sealer is used where two non-rigid parts, such as the intake
manifold and the engine block, are assembled together. |
| • | Do not use Room Temperature Vulcanizing (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. |
| • | Follow all safety recommendations and directions that are on the
container. |
| | To remove the sealant or the gasket material, refer
to Replacing Engine Gaskets. |
| | Notice: Do not allow the RTV sealant to enter any blind threaded hole. RTV sealant
that is allowed to enter a blind threaded hole can cause hydraulic lock of
the fastener when the fastener is tightened. Hydraulic lock of a fastener
can lead to damage to the fastener and/or the components. Hydraulic lock of
a fastener can also prevent the proper clamping loads to be obtained when
the fastener is tightened. Improper clamping loads can prevent proper sealing
of the components allowing leakage to occur. Preventing proper fastener tightening
can allow the components to loosen or separate leading to extensive engine
damage.
|
| • | 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. |
| • | Assemble components while RTV is still wet, within 3 minutes.
Do not wait for RTV to skin over. |
| • | Tighten bolts to specifications. Do not overtighten. |
Anaerobic Sealer
| • | 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. |
| • | Follow all safety recommendations and directions that are on the
container. |
| | To remove the sealant or the gasket material, refer
to Replacing Engine Gaskets. |
| • | Apply a continuous bead of gasket eliminator to one flange. Surfaces
to be resealed must be clean and dry. |
| | Notice: Do not allow the RTV sealant to enter any blind threaded hole. RTV sealant
that is allowed to enter a blind threaded hole can cause hydraulic lock of
the fastener when the fastener is tightened. Hydraulic lock of a fastener
can lead to damage to the fastener and/or the components. Hydraulic lock of
a fastener can also prevent the proper clamping loads to be obtained when
the fastener is tightened. Improper clamping loads can prevent proper sealing
of the components allowing leakage to occur. Preventing proper fastener tightening
can allow the components to loosen or separate leading to extensive engine
damage.
|
| • | Spread the sealer evenly
with your finger to get a uniform coating on the sealing surface. |
| | Important: 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.
|
| • | Tighten bolts to specifications. Do not overtighten. |
| • | After properly tightening the fasteners, remove the excess sealer
from the outside of the joint. |
