Table of Contents
Advertisement
TO CHECK AND CLEAN THE SPARK
PLUG
CAUTION
This vehicle is fitted with spark plugs
featuring platinum-type electrodes.
When cleaning, do not use wire brushes
and/or abrasive products. Use a jet of
compressed air only.
Key:
5) center electrode;
6) ceramic nose;
7) side electrode.
Inspect the spark plug, and make sure that
there are neither carbon deposits, nor cor-
rosion marks on the electrodes (5) and (7)
and on the ceramic nose (6); if necessary,
clean them with a jet of compressed air.
If the spark plug ceramic nose is cracked,
or if the electrodes are corroded, or there
are excessive deposits on the electrodes
of the nose, or the tip (8) of the central
electrode (5) is rounded, the spark plug
must be renewed.
134
use and maintenance ETV mille Caponord ABS
CAUTION
When replacing a spark plug, always
check the pitch (9) and length (10) of the
thread.
The use of a spark plug with too short a
threaded portion will result in carbon
deposits building up on the internal
thread of the head. This can result in
damage to the engine when the appro-
priate spark plug is installed.
The use of the spark plug with too long
a threaded portion can cause the plug
to strike the piston, with consequent ir-
reparable damage.
Use only the recommended spark plug
type, see p. 154 (TECHNICAL DATA).
Failure to observe this caution will re-
sult in reduction in the service life and
performance of the engine.
Use a round wire feeler gauge (11) to
check the spark plug gap, in order to
avoid damaging the platinum coating.
◆
Using a round wire feeler gauge (11),
check the spark plug gap.
CAUTION
Do not try to adjust the spark plug gap
in any way.
The gap must be 0.024 – 0.028 in (0.6 –
0.7 mm), otherwise it is necessary to re-
new the spark plug.
◆
Make sure the gasket (12) is in good
condition.
TO INSTALL THE SPARK PLUG
◆
With the gasket (12) in place, screw the
spark plug into the head finger tight.
◆
Tighten the spark plug with the special
spark plug wrench, approximately
one-half turn after it first snugly contacts
the cylinder head.
Spark plug tightening torque:
14.47 ftlb (20 Nm).
CAUTION
The spark plug must be properly tight-
ened, otherwise the engine may over-
heat and be seriously damaged.
CAUTION
Do not mix up the spark plug caps (1)
position.
Make sure that the spark plug cap (1) is
correctly installed to the spark plug.
Due to the vibrations of the engine, the
incorrect position would cause the dis-
connection of the spark plug cap, with
serious damage to the engine.
◆
Install the spark plug cap (1) properly, so
that it does not come off due to the vibra-
tions of the engine.
NOTE
Repeat the operations described
to remove, check and clean the other (sec-
ond) spark plug of the same cylinder and the
other two spark plugs of the second cylinder.
◆
Replace the fuel tank, see p. 123 (RE-
MOVING THE FUEL TANK).
Hide quick links:
Advertisement
Table of Contents
