Buick LeSabre 1965 Service Manual page 15

1-4 MAINTENANCE
extremely fine but harmless soot
(soft carbon) and lead particles.
The oil filter element does not
remove this harmless material
but it does remove harmful par-
ticles such as road dust, metal
chips and hard carbon.
e. Crankcase Flushing
Flushing the crankcase with oils
or solutions other than a good
grade of 10-W engine oil is not
recommended. When flushing to
r e m o v e contamination appears
advisable, use 3 quarts 10-W oil
(4 quarts if filter is drained) and
idle the engine at 1000 RPM
(equivalent to 20 MPH) until the
oil is hot, then drain crankcase
and oil filter immediately after
stopping engine. Fill crankcase
with correct quantity and seasonal
grade of oil. Install new oil filter
element.
f. Use of Buick HD Concentrate
Buick HD Concentrate, available
through Buick Parts Department
under Group 1.850 is a compound
of the materials used by oil re-
finers to manufacture high deter -
gency motor oils. It is intended
for use in engines operating under
aggravated conditions where en-
gine deposits, rust and corrosion
cannot be adequately retarded by
motor oils readily available to the
average motorist. It is especially
recommended for engines oper-
ated under restricted conditions
such as frequent stops, short
trips and slow speeds where such
symptoms as s t i c k i n g valves,
valve l i f t e r s and r i n g s are
noticed.
Although HD Concentrate may be
used continually it is normally
unnecessary to use it with every
crankcase refill. When used, the
instructions on the container
should be carefully observed.
1-2 MAINTENANCE-
PERIODICALLY WHILE
VEHICLE IS BEING
REFUELED
a. Battery
Check level. If necessary add
distilled water to bring level to
split ring at bottom of filler
wells.
NOTE: Do not overfill. Clean
top of battery; if wet with acid,
neutralize with soda and wash
clean. See Figure 1-3.
b. Tires
For maximum tire life with cor-
responding softness of ride,
maintain the tire pressures rec-
ommended in the Owners Guide.
Tire pressures should be checked
and corrected only when the car
has been standing at least 3 hours
or driven less than 1 mile. This
insures that the air in the tires
is cold and not expanded by heat
generated by driving. This is im-
portant since tires do increase in
pressure as much as 7 lbs. when
warm. Because it is almost im-
possible to estimate how much
warm tires have increased in
pressure, any attempt to compen-
sate for this increase can result
in inaccurate pressures.
c. Radiator Coolant
Radiator coolant level should be
checked when the engine is cold
if at all possible. If the radiator
cap is removed when the system
is at normal operating temper-
ature the coolant will boil and
spurt out due to the release of
pressure. Coolant lost in this
manner must of course be re-
placed. If c o o l a n t should be
needed, fill radiator to approxi-
mately 1" below filler neck when
cold. Do not overfill as loss of
coolant due to expansion will
result.
d. Engine Oil
This check should be performed
last to allow the oil to drain back
into the pan. Adding oil between
changes may be necessary but
only if the level is below the
lower mark on the dip stick. See
Figure 1-4.
NOTE: Oil level should only be
checked when the engine is warm
as cold oil drains back to the oil
pan very slowly.
1-3 MAINTENANCE—
EVERY 6,000 MILES
a. Engine Oil Change
Recommendations
Change oil every 60 days, but
never exceed 6,000 miles between
oil changes. See chart on page
1-1.
Figure 1-3-Bartery Filler Well
Figure 1-4—Engine O i l Gauge Rods