Oldsmobile 1970 Ninety-Eight Owner's Manual page 52

tion should be performed. The effective-
ness of the parking brake is related to the
rear brake lining wear and should be ad-
justed at the time of lining inspection. If
replacement parts are required, specify
General Motors and United Delco parts.
Carburetor
To meet Federal Exhaust Emission Re-
quirements and to obtain maximwn engine
performance and fuel economy, carbu-
retor idle speeds should be checked as
recommended in the Maintenance Sched-
ule. If engine stalls, idles too fast or idles
roughly, it should be adjusted. The car-
buretor fuel inlet filter should be replaced
every 12 months, or
mOre
often,
if
nec-
essary.
NOTE: Some engines will increase in idle
speed during the break-in period.
If
this
occurs, an idJe speed adjustment should
be made. Refer to label in engine com-
partment for correct specifications.
Clutch Pedal Ad;ustment
On cars equipped with a manual trans-
mission the clutch pedal should be ad-
justed from time to time so that it has
free travel before the clutch actually be-
gins to disengage. A light pressure should
be enough to push tbe pedal in about %
inch to 1 inch before resistance of the
clutch springs
is felt. If there
is little or
no "pedal lash," the clutch may be slip-
ping which
will cause
premature wear.
If there is too much
"pedal lash," the
clutch may not disengage completely,
causing gear shifting trouble. When "pedal
lash" is less than Ih inch or more than
1 inch, an adjustment should be made by
your Oldsmobile Dealer.
Engine
Cooling
System
Recommendations
The inhibited year-around engine coolant,
used to fill the cooling system at the fac-
tory, is a high quality solution that meets
General Motors Specification 1899-M.
This factory-fill coolant solution is fonnu-
lated to withstand two full calendar years
of nonnal operation without draining or
41
adding inhibitors, provided the same con-
centration of coolant is added if the sys-
tem needs additional fluid between drain
periods. The original factory-fill coolant
provides freezing protection to -20°F
(-32°F in Canada), and improved sum-
mer cooling. Each year, the cooling sys-
tem should be serviced as follows:
1. Wash the radiator cap thoroughly
with
clean water.
2. Check coolant level.
3. Check freeze protection.
4. Pressure test system. The system must
hold 15 to 18 psi.
5. Inspect all hoses and clamps.
CAUTION: Radiator cap must be
tight
when reinstaDed. Make certain red
stripe on cap lines up with red
stripe
00
radiator upper support_
Every two years the cooling system should
be serviced as follows:
1. Drain coolant, when hot, through the
radiator drain valve.
2. Close valve and add sufficient plain
water to fill system.
3. Run engine until normal operating
temperature is reached.