Impco HHI, Service Manual

Page: 13 / 485

13
COOLANT
Check coolant level in coolant recovery tank and
add
coolant as required . A dd 50/50 mixture of
ethylene glycol antifreeze and distilled water or
coolant per engine manufacturer’s instructions.
Do not add plain water. Replace coolant per the
recommended schedule.
IMPORTANT:
The manufacturers of the engine and fuel system
do not recommend the use of “stop leak” additives
to repair leaks in the cooling system. If leaks are
present the radiator should be removed and re-
paired or replaced.
ENGINE ELECTRICAL SYSTEM MAINTNANCE
The engine’s electrical system incorporates com-
puters to control various related components. The
electrical system connections and ground circuits
require good connections. Follow the recom-
mended maintenance schedule in this section to
maintain optimum performance. When inspecting
the electrical system check the following:

Check Positive and Negative cables for corro-
sion, rubbing, chafing, burning and to ensure
tight connections at both ends.

Check battery for cracks or damage to the
case and replace if necessary.

Inspect engine wire harness for rubbing, chaf-
ing, pinching, burning, and cracks or breaks in
the wiring.

Verify that engine harness connectors are cor-
rectly locked in by pushing in and then pulling
the connector halves outward.

Inspect primary ignition coil wires for harden-
ing, cracking, arcing, chafing, burning,
separation, split boot covers.

Check spark plug wires for hardening, crack-
ing, chafing, arcing or burning, separation, and
split boot covers.

Replace spark plugs at the required intervals
per the recommended maintenance schedule.

Verify that all electrical components are se-
curely mounted to the engine or chassis.

Verify that any additional electrical services
installed by the owner are properly installed in
the system.

Verify that the MIL, charging, and oil pressure
lights illuminate momentarily during engine start.
ENGINE CRANKCASE OIL
OIL RECOMMENDATION
Select an engine oil that will best match the pre-
vailing daytime temperature:
Motor oils meeting this spec receive the API
(American Petroleum Institute) starburst symbol:
The recommended API classification: Above SG.
The oil capacity for the 2.0L engine including a
new filter is 1.1 gallons (4.0L)
IMPORTANT:
Oils recommended by the engine manufacturer
already contain a balanced additive treatment.
Oils containing “solid” additives, non-detergent
oils, or low quality oils are not recommended by
the engine manufacturer. The supplemental addi-
tives added to the engine oil are not necessary
and may be harmful. The engine and fuel system