9
General Information
Sealant
A number of different types of sealant and locking flu-
ids are used on the engine. The sealant has different
properties for different union strengths, temperature
ranges, resistance to oil and chemicals, and for the
different materials and slot sizes in the engine.
It is therefore important to use the correct type of
sealant and locking fluid for those unions that require
them, in order to ensure satisfactory service work.
The Workshop Manual indicates in the relevant
chapters the compounds used when the drives were
manufactured.
The same compound, or a compound with equivalent
properties but of other manufacture, should be used
during the service work.
When using sealant and locking fluids it is important
that the surfaces are free from oil, grease, paint and
anti-rust agent, and that they are dry.
Always follow the manufacturer’s instructions con-
cerning application temperature and hardening times
etc. for the product.
Different basic types of sealant are used on the drive
and are characterised by:
RTV compound (Room Temperature Vulcanising).
Often used together with gaskets, e.g. sealing of
gasket joints or applied on gaskets. RTV compound
is clearly visible when the part has been dismantled,
and old RTV compound must be removed before the
union is sealed again.
The following RTV compounds are mentioned in the
Workshop Manual:
Volvo Penta part no. 1161099-5
(alternative Permatex
®
no. 3).
Old sealant is removed with denatured spirit.
Anaerobic compounds. These compounds harden
on the absence of air. The compound is used when
two solid parts, e.g. cast components, are fitted
together without a gasket. A common application is
also to secure and seal plugs, thread on studs, cocks,
and oil pressure sensors etc. Hardened anaerobic
compound is transparent and therefore the
compounds are dyed to make them visible. Hardened
anaerobic compounds are very resistant to solvents
and old compound cannot be removed. Before
refitting they are carefully degreased, after which new
sealant is applied.
The following anaerobic compounds are mentioned in
the Workshop Manual:
Volvo Penta part no. 1161053-2 (alternative Loctite
®
243)
Volvo Penta part no.1161351-0 (alterantive Loctite
®
603).
Polymeric compounds. The following polymeric
compounds are mentioned in the Workshop Manual:
Volvo Penta part no. 1141570-0, Sealant.
NOTE! Permatex® is a registered trademark for Permatex
Corporation.
Loctite® is a registered trademark for Loctite Corporation.
