Thread Sealant - Perkins New 1000 Series Workshop Manual

2
New 1000 Series

Thread sealant

When setscrews or studs are fitted into holes which are tapped through the cylinder block, a suitable sealant
must be used to prevent leakage.
Micro encapsulated anaerobic sealant (M.E.A.S) fasteners have been introduced instead of jointing
compounds or other sealants when the fasteners are fitted in through holes into oil or coolant passages. The
identification of these fasteners, as supplied, is by a red, blue, or other colour sealant around the fastener
threads.
With M.E.A.S. sealed studs, the sealed end must be fitted into the cylinder head / cylinder block etc. Ensure
that the threaded holes have a 1,59 mm (0.0625 in) 45° chamfer, to ensure that when the new fasteners are
fitted the M.E.A.S. sealant is not removed. If the fasteners have to be removed and fitted again, the threads
must be cleaned and a suitable sealant used.
Note: New setscrews have sealant applied by the manufacturer to the first 13,0 mm (0.50 in) of the threads.
If the setscrews are to be used again, clean the old sealant from the male and female threads and apply new
sealant to the setscrews.
Workshop Manual, TPD 1350E, Issue 4 35
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