Range Rover (LM) V8-4398cc 4.4L (M62) (2003)
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Encapsulated bolts and screws have a micro-encapsulated locking agent pre-applied to the thread. They are identified by a coloured section which
extends 360 ° around the thread. The locking agent is released and activated by the assembly process and is then chemically cured to provide the locking
action.
Unless a specific repair procedure states otherwise encapsulated bolts may be re-used providing the threads are undamaged and the following procedure
is adopted:
-
Remove loose adhesive from the bolt and housing threads.
-
Ensure threads are clean and free of oil and grease.
-
Apply an approved locking agent.
An encapsulated bolt may be replaced with a bolt of equivalent specification provided it is treated with an approved locking agent.
Self-locking bolts and screws
Self-locking bolts and screws, i.e. nylon patched or trilobular thread can be re-used providing resistance can be felt when the locking portion enters the
female thread.
Nylon patched bolts and screws have a locking agent pre-applied to the threads. They are identified by the presence of a coloured section of thread which
extends for up to 180 ° around the thread.
Trilobular bolts (i.e. Powerlock) have a special thread form which creates a slight interference with the thread of the hole or nut into which it is screwed.
DO NOT re-use self-locking fasteners in critical locations (e.g. engine bearings, flywheel). Always use the correct replacement self-locking nut, bolt or
screw.
DO NOT fit non self-locking fasteners in applications where a self-locking nut, bolt or screw is specified.
Nut identification
