Volvo Penta 3.0GLP-C, Руководство пользователя

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Maintenance
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VPA 7743722 English 10-2004
The spark plug wires are a special resistance
type. The core is carbon-impregnated linen. This
type wire is superior to copper core wire in its
resistance to crossfire; however, it is more easily
damaged than copper core. For this reason, pull
on the spark plug boots to remove the spark plug
wires, rather than pulling on the wire insulation. If
the wire is stretched, the core may be broken with
no evidence of damage on the outer insulation. If
the core is broken, it will cause misfiring. In the
case of wire damage, it is necessary to replace
the complete wire assembly since a satisfactory
repair cannot be made.
4. Clean ignition wires with a cloth moistened in ker-
osene, and wipe dry. Bend wires to check for brit-
tle, cracked or loose insulation. Defective
insulation may result in misfiring, cross-firing, or
spark to ground; therefore, defective wires must
be replaced.
5. If the wires are in good condition, clean any termi-
nals that are corroded. Replace any that are bro-
ken or distorted. Replace any wires with broken
or deteriorated cable nipples or spark plug boots.
6. Clean spark plugs.
Spark plugs that have carbon or oxide deposits
should be cleaned in a blast type spark plug
cleaner. Scraping with a pointed tool will not
properly remove the deposits and may damage
the insulator. If spark plugs have a wet or oily
deposit, dip them in a decreasing solvent and dry
thoroughly with compressed air. Oily plugs will
cause the cleaning compound to pack in the
shell. Carefully follow the instructions of the man-
ufacturer of the cleaner being used. Clean each
plug until the interior of shell and entire insulator
is cleaned. Avoid excessive blasting.
7. Examine interior of plug in good light. Remove
any cleaning compound with compressed air. If
traces of carbon or oxide remain in plug, finish
the cleaning with a light blasting operation. Clean
firing surfaces of center and side electrodes with
several strokes of a fine cut file.
8. When spark plugs have been thoroughly cleaned,
carefully inspect them for cracks or other defects
that may not have been visible before cleaning.
9. Use a round wire feeler gauge to check the gap
between the spark plug electrodes. (Flat feeler
gauges will not give a correct measurement if the
electrodes are worn.) Adjust gap by bending the
side electrode only. Bending the center electrode
will crack the insulator. Setting the spark plug gap
to any other specification in an attempt to
improve idle or affect engine performance is not
recommended.
10. See the diagrams for correct installation of spark
plugs and wires.
For proper engine performance it is very important
that the correct spark plugs be used. When installing
spark plugs, make sure that the threads in the cylinder
head and all surfaces on plugs and in cylinder heads
are clean. Tighten spark plugs the specified amount.
All engines use tapered seat plugs without gaskets.
DANGER! Do not operate engine if spark plug
boots or high-tension leads are torn or
cracked. This condition can allow external
sparks, which could ignite any fuel vapors in
the engine compartment.
22843
Spark plug wires must be arranged between the dis-
tributor cap and spark plugs in the order of firing se-
quence. If spark plug wires are not correctly installed,
misfiring or cross-firing will result.
The 8.1Gi-B/GXi-A engines use a distributorless igni-
tion system with one coil per cylinder. Refer to the sec-
tion entitled
Technical Data on page 113 for correct
firing order information.
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