Thread Sealant - Perkins 900 Series Workshop Manual

2
900 Series

Thread sealant

When setscrews or studs are fitted into holes that are tapped into the body of the engine, a suitable sealant
should be used. Perkins have introduced the use of Micro Encapsulated Anaerobic Sealant (M.E.A.S)
fasteners.
There is no requirement to use any other jointing compound or sealant when the fasteners are fitted into holes
through oil or coolant galleries. The fasteners are identified by a red, blue, or other colour sealant around the
fastener threads.
When M.E.A.S. sealed studs are used, ensure that the sealed end is fitted into the cylinder head / cylinder
block etc. Threaded holes must have a 1,59 mm (0.0625 in) 45° chamfer, to prevent the removal of M.E.A.S.
sealant when new fasteners are fitted. If the fasteners have to be removed and fitted again, the threads must
be cleaned and a suitable sealant applied.
28 Workshop Manual, TPD 1345E, issue 3
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