Mitsubishi Lancer Evolution-VII Workshop Manual page 650

11B-24
Crack
Peeling of canvas
Cracking at root
Edges are rounded
Abnormal wear
(The core wires are frayed.)
Rubber exposed due to
worn canvas
Teeth are missing
ENGINE OVERHAUL -
INSPECTION
1. TIMING BELT
Crack
Cracking
on side
2. AUTO TENSIONER
12 mm
Timing Belt
Inspect each section of the belt in detail, and if any of
the following type of damage is found, replace the belt
with a new part.
(1) Hardening of backface rubber.
The backface is glossy, marks are not made even
when a fingernail is run cross it, and there is no
elasticity.
(2) Cracking of backface rubber.
(3) Cracking of canvas.
(4) Cracking at root.
(5) Cracking on side of belt.
(6) Abnormal wear on side of belt.
NOTE
The state is normal if the cutting surface is neat as
if cut with a sharp knife.
(7) Abnormal wear of teeth.
First stages: Canvas is worn (canvas fibres are raised,
rubber is removed and whitish, and canvas seams
are unclear).
Latter stages: Canvas is worn off, and rubber is
exposed (face width is narrow).
(8) Teeth are missing.
(1) Check for oil leaks. If any leaks are found, replace.
(2) Check whether the rod end is worn or damaged,
and replace if necessary.
(3) Measure the rod protrusion length. If not at the
standard value, replace the auto tensioner.
Standard value: 12 mm