LUBRICATION 0-15
CRANKCASE VENTILATION VALVE
VALVE TYPE
NOTE: Under prolonged dusty driving condi-
tions,
it is recommended that these operations
be performed more often. Every 12,000 miles
or 12 months the valve should be replaced.
Connecting hoses, fittings, flame arrestor and
crankcase breather cap (where used) should be
cleaned. At every oil change the system should
be tested for proper function and serviced, if
necessary.
FUEL FILTER
Replace filter element located in carburetor inlet if
flooding occurs, if engine surges during constant speed
operation (pulsating effect) or if poor performance is
experienced during acceleration or at higher speeds.
AIR CLEANER
NOTE: Under prolonged dusty driving condi-
tions,
it is recommended that these operations
be performed more often.
POLYURETHANE TYPE-
Every 12,000 miles clean element in solvent, squeeze
out solvent, then soak in engine oil and squeeze out
excess.
OIL WETTED PAPER ELEMENT TYPE-
First 12,000 miles inspect or test element; if satis-
factory, re-use element but recheck every 6,000 miles
until replaced. Element must not be washed, oiled,
tapped or cleaned with an air hose.
BATTERY TERMINAL WASHERS
Battery terminals have felt washers between top of
case and cable connections to minimize corrosive action
of battery acid. These felt washers should be saturated
with engine oil every 6,000 miles.
DISTRIBUTOR
4 and 6-Cylinder Engine—Remove distributor cap and
rotate lubricator 1/2 turn at 12,000 mile intervals. Re-
place at 24,000 mile intervals.
8-Cylinder Engine—Change cam lubricator end for end
at 12,000 mile intervals. Replace at 24,000 mile
intervals.
REAR AXLE AND 3-SPEED AND
OVERDRIVE, 4-SPEED TRANSMISSIONS
The passenger car operates under the most severe
lubrication conditions at high speed and requires a hypoid
lubricant which will meet this condition.
Recommended Lubricants
Standard Rear Axles—SAE 90 "Multi-Purpose" gear
lubricant.
Positraction Rear Axles—Use special Positraction
lubricant.
CAUTION: Straight Mineral Oil gear lubricants
must not be used in hypoid rear axles.
Transmissions—SAE 90 "Multi-Purpose" gear
lubricant.
The SAE 90 viscosity grade is recommended for year
round use. However, when extremely low temperatures
are encountered for protracted periods during the winter
months, the SAE 80 viscosity grade may be used.
"Multi-Purpose" Gear Lubricants
Gear lubricants that will satisfactorily lubricate hypoid
rear axles have been developed and are commonly re-
ferred to as ' 'Multi-Purpose" gear lubricants meeting
U.S.
Army Ord. Spec. MIL-L-2105B.
These lubricants can also be satisfactorily used in
manual transmissions.
CAUTION: With Positraction rear axles use
special Positraction lubricant.
"Multi-Purpose" gear lubricants must be manufac-
tured under carefully controlled conditions and the
lubricant manufacturer must be responsible for the
satisfactory performance of his product. His reputation
is the best indication of quality.
Lubricant Additions
The lubricant level in the axle and transmission hous-
ings should be checked periodically. (Every 6,000 miles.)
It is recommended that any additions required to bring
up the lubricant level be made using the same type lubri-
cant already in the housing.
When checking lubricant level in transmission or rear
axle the unit being cheeked should be at operating
temperature. With unit at operating temperature the
lubricant should be level with bottom of the filler plug
hole.
If the lubricant level is checked with the unit cold
the lubricant level should be 1/2 inch below the filler
plug hole.
Lubricant Changes
The rear axle lubricant does not require changing for
the life of the vehicle. If additions are needed, or when
refilling the axle after service procedures, use lubricants
described above.
POWERGLIDE TRANSMISSION
NOTE: Every 12,000 miles, it is recommended
that the Powerglide low band be adjusted as
specified in Section 7 of this manual.
Every 6,000 miles--Check fluid level on dipstick with
engine idling, selector lever in neutral position, parking
brake set and transmission at operating temperature. If
fluid level is below full mark on dip stick, adding a small
amount of Automatic Transmission Fluid, General Motors
Automatic Transmission Fluid (Part Numbers 1050568-
69,
70) is recommended. If this fluid is not obtainable,
use Automatic Transmission Fluid Type 'A' bearing the
mark AQ-ATF followed by a number and the suffix letter
'A'.
Recheck fluid level on dip stick and again add a
small amount of fluid if needed to bring level to full
mark. DO NOT OVERFILL.
CHEVROLET CHASSIS SERVICE MANUAL
ENGINE 6-31
Chevy II
1.
Disconnect battery positive cable.
2.
Drain engine oil.
3.
Disconnect and remove starter.
4 Disconnect steering idler arm bracket at right hand
frame rail and swing steering linkage down for pan
clearance.
5.
Disconnect* exhaust pipes at manifolds and allow
pipes to hang free.
6. Remove oil pan and discard gaskets and seals.
Corvette
1.
Disconnect battery positive cable then remove oil
dipstick and tube.
2.
Raise and support vehicle then drain engine oil.
3.
Remove starter and flywheel underpan.
4.
Disconnect steering linkage idler at frame and lower
the linkage.
5.
Remove oil pan and discard gaskets and seals.
6. On Hi-Performance engines, the oil baffle must
be removed before additional operations can be
performed.
NOTE: On the 427 cu. in. engine, the oil pan
has three 1/4" x 20 attaching bolts at crankcase
front cqver. One located at each corner and one
at lower center.
Installation
1.
Thoroughly clean all gasket sealing surfaces.
NOTE: Use a new pan. gasket set.
2.
Install side gaskets on pan rails, using.gasket sealer
as a retainer.
3.
Install rear oil pan seal in groove in rear main
bearing cap with ends (fig. 9V) butting side gaskets.
4.
Install oil pan front seal in groove in .crankcaee front
cover, with ends butting side gaskets.
5.
If crankshaft was rotated while £>an was off, place
timing mark at 6:00 o'clock position.
6. Install oil pan and torque bolts to specifications.
NOTE: On 396 and 427 cu. in. engines, start
three 1/4" x 20 bolts into crankcase front cover
before tightening, any other pan bolts.
7.
Complete installation as follows:
Chevrolet
and Camaro
a. Using a suitable jack (and a block of wood to pre-
vent damaging oil pan) raise engine enough to re-
move 2" x 4" wood blocks, then lower engine.
b.
On vehicles equipped with automatic transmission
install converter housing underpan.
c. Install through bolts in engine front mounts.
d. Install and connect starter. Connect steering rod
at idler lever.
e. Lower vehicle and install fan blade.
f. Cbnnnect lower radiator hose, then install oil dip
stick tube and dip stick.
g. Connect distributor cap and battery positive
cable.
h. Fill radiator with coolant and fill engine with oil,
then start engine and check for leaks.
Chevelle
a. On vehicles equipped with automatic transmission
Fig.
9V - Oil Pan Gasket and Seal Location
install converter housing underpan.
b.
.Install starter.
c. Install, engine as outlined.
Chevy II
a. Connect exhaust pipe to manifold flange using new
packing seals.
b.
Connect steering idler arm bracket.
c. Connect starter wires..
d. Connect battery cable.
e. Fill with oil, start engine and check for leaks.
Corvette
a. Connect steering linkage.
b.
Install oil dip stick tube and dip stick then con-
nect battery cables.
c. Fill engine with oil, then start engine and check
for leaks.
OIL PUMP
Removal
1.
Remove oil pan as outlined.
2.
Remove pump to rear main bearing cap bolt and re-
move pump and extension shaft.
Installation
1.
Assemble pump and extension shaft to rear main
CHEVROLET CHASSIS SERVICE MANUAL