Sealants; Rtv Preparations (Room Temperature Vulcanizing); Anaerobic Preparations - Volvo Penta MS2 Workshop Manual

General instructions

Sealants

Several different types of sealant and locking fluids
are used on the engine. The properties of the prepara-
tions differ, and they are intended for different
strengths of fastener, temperature, resistance to oil
and other chemicals, and for the different materials
and gap thicknesses found in the engine.
It is therefore important that the correct types of seal-
ant and locking fluids are used on the fasteners where
needed, to give a fully acceptable service result.
In the workshop manual, the relevant chapters contain
notes on the preparations used in our production.
In service work, the same preparations or preparations
of corresponding properties, but of other makes, shall
be used.
When sealants and locking fluids are used, it is impor-
tant that the surfaces are free from oil, grease, paint
and rust-protection, and that they are dry.
Always observe the manufacturer's instructions about
temperatures of use, hardening times and other in-
structions for use of the product.
Various basic types of preparation are used, charac-
teristics are as follows:

RTV preparations (Room Temperature Vulcanizing).

These are mostly used together with gaskets, such as
sealing gasket joints, or are brushed on gaskets. RTV
preparations are fully visible when the component has
been disassembled; old RTV compound must be re-
moved before the joint is sealed again.
The following RTV preparations are mentioned in the
workshop manual: Volvo Penta part no. 840879-1,
®
Loctite 574; Volvo Penta part no. 1161099-5, Perma-
®
tex No.3. Remove old sealant with denatured alcohol
in all cases.
8

Anaerobic preparations

These preparations harden in the absence of air.
These preparations are used when two solid compo-
nents, such as two cast components, are fitted to-
gether without a gasket. Common uses are also to
lock and seal plugs, stud threads, taps, oil pressure
monitors etc. Hardened anaerobic preparations are
glassy and for this reason, the preparations are col-
ored to make them visible. Hardened anaerobic prepa-
rations are highly resistant to solvents, and old com-
pound can not be removed. On re-installation, de-
grease carefully and then apply new sealant.
The following anaerobic preparations are mentioned in
the workshop manual:
Volvo Penta part no. 1161053-2, Loctite
The following polymer preparations are mentioned in
the workshop manual:
Volvo Penta part no. 1141570-0 (white)
NOTE! Loctite ® is a registered trademark belonging to the Loctite
Corporation, Permatex ® is a registered trademark belonging to the
Permatex Corporation.
®
243.