CLUTCH AND TRANSMISSIONS 7-31
with the "white" stripe painted on the engine
side of the flywheel outer rim, denoting the
"heavy" side of the engine.
1.
Mount transmission on transmission lifting equip-
ment installed on jack or other lifting device.
2.
Remove converter holding tool.
CAUTION: Do not permit converter to move
forward after removal of holding tool.
3.
Raise transmission into place at rear of engine and
install transmission case to engine upper mounting
bolts,
then install remainder of the mounting*bolts.
Torque bolts to 35 ft. lbs.
4.
Remove support from beneath engine, then raise
rear of transmission to final position.
5. Through flywheel cover opening align as closely as
possible the "white" flywheel balance mark stripe
and the "blue" painted stripe on the end of converter
cover and housing. If scribed during removal, align
scribe marks on flywheel and converter cover. In-
stall converter to flywheel attaching bolts. Torque
bolts to 15-20 ft. lbs.
6. Install converter under pan.
7. Reinstall transmission support crossmember to
transmission and frame.
8. Remove transmission lift equipment.
9. Connect propeller shaft to transmissions.
10.
Connect manual and TV control lever rods to
transmission.
11.
Connect oil cooler lines (if so equipped), vacuum
Fig.
13PG - Converter Holding Tool
modulato:* line, and speedometer drive cable to
transmission.
12.
Refill transmission through filler tube, using Funnel
J-4264 and following the recommended procedure
provided earlier in this section.
13.
Check transmission for proper operation and for
leakage. Check and, if necessary, adjust linkage.
CORVETTE POWERGLIDE TRANSMISSION
Replacement
1.
Disconnect battery ground cable.
2.
Remove ball end from transmission shift control
lever.
3.
Raise front and rear of vehicle.
4.
Insert a block of wood between the top of the dif-
ferential carrier housing and the underbody (to
prevent upward travel of the carrier when the car-
rier front support is disconnected).
5. Disconnect the differential carrier front support
from its frame bracket, by removing the nut on the
underside of the biscuit mount.
6. Pry the carrier downward to relieve load while re-
moving the two center mounting bolts from the
carrier front support. (To pry carrier downward
insert crowfoot end of a pry bar**hrough the open-
ing in the carrier front support, hooking end of bar
over top of the center mounting bolt pad cast in the
underside of the carrier).
7. Pivot carrier support downward for access to prop
shaft "U"-joint.
8. Disconnect prop shaft front and then rear
"U"
bolts.
9. Disconnect parking brake cable from ball socket at
idler lever located near center of underbody.
10.
Remove prop shaft by moving shaft forward.
11.
Remove left bank exhaust pipe.
12.
Remove right bank exhaust pipe and heat riser.
13.
Disassemble the transmission mount, as follows:
a. Remove the two bolts that attach rear mount
cushion to the rear mount bracket.
b.
Support engine under oil pan and raise engine to
remove load from rear mount cushion.
CAUTION: To avoid damage to oil pan, a suit-
able wide base, heavy wood platform should be
placed between the jack pad and the oil pan.
c. Remove the three transmission mount bracket-
to-crossmember bolts, then remove mount
bracket.
d. Remove the two bolts from mount pad to trans-
mission case and remove rubber mount cushion
and exhaust pipe "yoke".
14.
Disconnect oil cooler lines at transmission and
swing lines clear.
15.
Remove connector underpan.
16.
Remove converter to flywheel attaching bolts.
17.
At transmission disconnect vacuum modulator line
and speedometer cable.
18.
Disconnect transmission shift linkage from trans-
mission gearshift control lever. Remove shift lever.
19.
At transmission, remove throttle valve linkage and
disconnect neutral safety switch linkage, also re-
move the gearshift control linkage.
20.
Remove neutral safety switch from transmission
control bracket.
CHEVROLET CHASSIS SERVICE
CLUTCH AND TRANSMISSIONS 7-32
21.
Remove transmission output shaft slip yoke and in-
sert a plastic shipping plug in end of extension to
prevent spillage of transmission fluid.
NOTE:
The yoke is removed to avoid tearing
the heat reflecting pad on the underbbdy, when
the transmission is being removed.
22.
Remove bright metal ignition shielding from dis-
tributor area.
23.
Remove the transmission dip stick and tube
assembly.
24.
Disconnect transmission vacuum modulator line at
distributor advance line tee.
25.
Position transmission hoist under transmission and
attach safety chain to transmission.
26.
Remove transmission converter housing-to-engine
attaching foolts and slide transmission rearward.
NOTE:
Observe converter when moving trans-
mission rearward. If converter does not move
with the transmission, pry it free of flywheel
before proceeding.
27.
Install converter retaining strap.
28.
Lower and remove transmission from vehicle by
tilting the front down and to the right while inter-
mittently lowering the transmission to facilitate its
• removal.
29.
Reinstall transmission assembly by performing the
above steps in reverse order.
Bolt Torques
Transmission Case to Flywheel
Housing Bolts 35 ft. lbs.
Converter to Flywheel Bolts. . , . . 35 ft. lbs.
OTHER SERVICE OPERATIONS
Although certain operations, such as oil pan or gasket
replacement, valve body, governor, filler pipe "O" ring,
speedometer drive gear, case extension "0" ring and
rear oil seal, vacuum modulator, and servo cover or
gasket service may be performed from underneath the
vehicle without removing the Powerglide; their service
procedure is covered in the Passenger Overhaul Manual
and is not repeated here. Refer to the- Powerglide Sec-
tion of the Passenger Overhaul Manual for all other
service operations not covered here.
DIAGNOSIS
Proper operation of the Powerglide transmission may
be affected by a number of factors, all of which must be
considered when trouble in the unit is diagnosed.
Proper trouble diagnosis can only be accomplished
when performed in a thorough step by step procedure.
The following procedure has been devised and tested and
is recommended for all trouble diagnosis complaints and
if the service man will follow this checking procedure,
accurate and dependable diagnosis may be accomplished.
This will result in a savings of time, not only to the
service man, but to the customer as well.
WARMING UP TRANSMISSION
Before attempting to check and/or correct any com-
plaints on the Powerglide transmission it is absolutely
essential that the oil level be checked and corrected if
necessary. An oil level which is either too high or too
low can be the cause of a number of abnormal conditions
from excessive noise to slippage in all ranges.
It must be remembered that cold oil will slow up the
action of the hydraulic controls in the transmission. For
this reason a trouble or oil leak diagnosis should not be
attempted until the transmission has been warmed up by
either of the following procedures:
Shop Warm Up
1.
Connect tachometer to engine.
2.
Set parking brake tight and start engine.
3.
Place selector light in
"D"
(drive) range.
4.
Adjust carburetor idle speed adjusting screw to run
engine at approximately 750 rpm and operate in this
manner for two minutes. At the end of two minutes
of operation, the transmission will be sufficiently
warmed up for diagnosis purposes.
NOTE:
At this point, readjust the engine idle
speed to 450-475 rpm in
"D"
range.
Road Warm Up
Drive the car approximately 5 miles with frequent
starts and stops.
NOTE:
At this point, make sure the engine idle
speed is set to 450-475 rpm in
"D"
range.
CHECKING FLUID LEVEL AND CONDITION
After transmission has been warmed up, check the
fluid level with the engine idling, parking brake set and
control lever in "N" (neutral). If the fluid level is low,
add fluid to bring level up to the full mark on gauge rod,
CAUTION: If fluid level is too high, fluid may
be aerated by the planet carrier. Aerated fluid
will cause turbulence in the converter which will
result in lost power, lower stall speed and lower
pressures in control circuits. Lower fluid level
to full mark, then shut off engine to allow air
bubbles to work out of fluid.
When checking oil level, aburned smell and discolora-
tion indicate burned clutches or bands and the transmis-
sion will have to be removed.
MANUAL LINKAGE
Manual linkage adjustment and the associated neutral
safety switch are important from a safety standpoint.
The neutral safety switch should be adjusted so that the
engine will start in the Park and Neutral positions only.
With the selector lever in the Park position, the park-
ing pawl should freely engage and prevent the vehicle
CHEVROLET CHASSIS SERVICE MANUAL
CLUTCH AND TRANSMISSIONS 7-36
TURBO HYDRA-MATIC TRANSMISSION
INDEX
Page
General Description . . , . 7-36
Maintenance and Adjustments . 7-37
Transmission Fluid 7-37
Fluid Level Indicator 7-37
Shift Control Linkage Adjustment ........... 7-37
Neutral Safety Switch Adjustment 7-37
Draining and Refilling Transmission . . . 7-37
Pressure Regulator Valve 7-38
Control Valve Body . 7-39
Governor ..'.... 7-40
Modulator and Modulator Valve 7-40
Parking Linkage . . 7-40
Page
Rear Seal -. 7-40
Other Service Operations . . 7-40
Transmission Replacement 7-40
Turbo Hydra-Matic Diagnosis Procedure. ......... 7-41
Sequence . ; ; 7-41
Oil Level and Condition Check 7-41
Manual Linkage 7-41
Oil Leaks .' 7-41
Case Porosity - Repair ................ 7-42
Oil Pressure Check 7-42
Transmission Shift Points 7-42
Special Tools 7-43
GENERAL DESCRIPTION
The Turbo Hydra-Matic transmission is a fully auto-
matic unit consisting primarily of a 3-element hydraulic
torque converter and a compound planetary gear set.
Three multiple-disc clutches, one sprag unit, one roller
clutch and two bands provide the friction elements re-
quired to obtain the desired function of the compound
planetary gear set.
The torque converter couples the engine to the plane-
tary gears through oil and provides hydraulic torque
multiplication when required. The compound planetary
gear set produces three forward speeds and reverse.
The
3-
element torque converter consists of a pump or
driving member, a turbine or driven member, and a
stator assembly. The stator is mounted on a one-way
roller clutch which will allow the stator to turn clock-
wise but not counter-clockwise.
The torque converter housing is filled with oil and
is attached to the engine crankshaft by a flex plate and
always rotates at engine speed. The converter pump is
an integral part of the converter housing, therefore the
pump blades, rotating at engine speed, set the oil within
the converter into motion and direct it to the turbine,
causing the turbine to rotate.
As the oil passes through the turbine it is traveling in
such a direction that if it were not re-directed by the
stator it would hit the rear of the converter pump blades
and impede its pumping action. So at low turbine speeds,
the oil is re-directed by the stator to the converter pump
in such a manner that it actually assists the converter
pump to deliver power or multiply engine torque.
As turbine speed increases, the direction of the oil
leaving the turbine changes and flows against the rear
side of the stator vanes in a clockwise direction. Since
the stator is now impeding the smooth flow of oil, its
roller clutch releases and it revolves freely on its shaft.
Once the stator becomes inactive, there is no further
multiplication of engine torque within the converter. At
this point, the converter is merely acting as a fluid
coupling as both the converter pump and turbine are
being driven at approximately the same speed - or at a
one-to-one ratio.
A hydraulic system pressurized by a gear type pump
provides the working pressure required to operate the
friction elements and automatic controls.
External control connections to transmission are:
Manual Linkage
Engine Vacuum
12 Volt Electrical
Signal
To select the desired op-
erating range.
To operate a vacuum mod-
ulator unit.
To operate an electrical
detent solenoid.
A vacuum modulator is used to automatically sense
any change in the torque input to the transmission. The
vacuum, modulator transmits this signal to the pressure
regulator for line pressure control, to the 1-2 accumula-
tor valve, and to the shift valves so that all torque re-
quirements of the transmission are met and smooth
shifts are obtained at all throttle openings.
The detent solenoid is activated by an alectric switch
on the carburetor. When the throttle is fully opened, the
switch on the carburetor is closed, activating the detent
solenoid and. causing the transmission to downshift at
speeds below approximately 70 MPH.
The selector quadrant has six selector positions: P,R,
N,D,
L2,L1.
P.
*
- Park position positively locks the output shaft to
the transmission case by means of a locking pawl
to prevent the vehicle from rolling in either di-
rection. The engine may be started in Park
position.
R. - Reverse enables the vehicle to be operated in a
reverse direction.
N.
- Neutral position enables the engine to be started
and run without driving the vehicle.
D,
- Drive Range is used for all normal driving condi-
tions and maximum economy. Drive Range has
three gear ratios, from the starting ratio to
direct drive. Detent downshifts are available by
depressing the accelerator to the floor.
L2.
- L2 Range has the same starting ratio as Drive
Range, but prevents the transmission from shift-
ing above second speed to retain second speed
acceleration when extra performance is desired.
L2 Range can also be used for engine braking.
L2 Range can be selected at any vehicle speed,
and the transmission will shift to second gear and
remain in second until the vehicle speed or the
throttle are changed to obtain first gear operation
in the same manner as in D Range.
CHIVROLET CHASSIS SERVICE MANUAL
CLUTCH AND TRANSMISSIONS 7-37
LI.
- LI Range can be selected at any vehicle speed,
and the transmission will shift to second gear
and remain in second until vehicle speed is re-
duced to approximately 40 MPH, .depending on
axle ratio. LI Range position prevents the trans-
mission from shifting out of first gear.
It is very important that any communication concerning
the Turbo Hydra-Matic always contain the transmission
serial number and that all transmission parts returned
to Chevrolet Motor Division always be tagged with the
transmission serial number.
MAINTENANCE AND ADJUSTMENTS
TRANSMISSION FLUID
Transmission fluid level should be checked with trans-
mission warm and selector lever in "P" Park position,
every time engine oil level is checked or as specified in
Section 0 when engine oil is changed.
CAUTION: Since the Turbo Hydra-Matic trans-
mission is very sensitive to oil level, special
precautions should be taken when checking the
oil level, to insure against an overfifE
Transmission fluid should be changed as specified in
Section 0.
FLUID LEVEL INDICATOR
The fluid level indicator is located in the filler pipe at
the right rear corner of the engine. To bring the fluid
level from the add mark to the full mark add 1 pint.
Fluid level should be to the full mark with transmission
at normal operating temperature. With cold fluid the
level should be at the add mark or slightly below.
SHIFT CONTROL LINKAGE ADJUSTMENT
Adjust linkage as shown below and in Figure 2.
1.
The shift tube and lever assembly must be free in the
mast jacket See Section 9 for alignment of steering
column assembly if necessary.
2.
To check for proper shift linkage adjustment, lift the
transmission selector lever towards the steering
wheel. Allow the selector lever to be positioned in
drive (D) by the transmission detent.
NOTE: Do not use the indicator pointer as a
reference to position the selector lever. When
performing linkage adjustment, pointer is ad-
justed last.
3.
Release the selector lever. The lever should be in-
hibited from engaging low range unless the lever is
lifted.
4.
Lift the selector lever towards the steering wheel,
and allow the lever to be positioned in neutral (N) by
the transmission detent.
5.
Release the selector lever. The lever should now be
inhibited from engaging reverse range unless the
lever is lifted.
6. A properly adjusted linkage will prevent the selector
lever from moving beyond both the neutral detent,
and the drive detent unless the lever is lifted to pass
over the mechanical stop in the steering column.
See schematic diagram.
7.
In the event that an adjustment is required, place the
selector lever in drive (D) position as determined by
the transmission detent. See Steps 2 and 3.
8. Loosen the adjustment swivel at the cross-shaft, and
rotate the transmission lever so that it contacts the
drive stop in the steering column.
9. Tighten the swivel and recheck the adjustment. See
Steps 2 and 6. -
l(h Readjust indicator needle if necessary to agree with
the transmission detent" positions. See Section 9.
11.
Readjust neutral safety switch if necessary to pro-
vide the correct relationship to the transmission de-
tent positions. See Section 12.
12.
When properly adjusted the following conditions must
be met by manual operation of the steering column
shift lever:
a. From reverse to drive position travel, the trans-
mission detent feel must be noted and related to
indicated position on dial.
b.
When in drive and reverse positions, pull lever
rearward (towards steering wheel) and then re-
lease. It must drop back into position with no
restrictions.
NEUTRAL SAFETY SWITCH ADJUSTMENT
The neutral safety switch must be adjusted so that the
car will start in the park or neutral position, but will not
start in the other positions. For replacement refer to
Section 12 of this Manual.
DRAINING AND REFILLING TRANSMISSION
Drain oil immediately after operation before it has had
an opportunity to cool.
To drain oil proceed as follows:
1.
Remove bottom pan attaching screws, pan, and gas-
ket.
2.
Remove oil strainer. Remove "O" ring seal from
pick-up pipe and discard.
3.
Discard strainer if dirty.
4.
Install new "O" ring seal on pick-up pipe and install
strainer and pipe assembly.
5.
Thoroughly clean bottom pan.
6.. Affix new gasket to bottom pan with petroleum jelly.
7.
Install bottom pan with attaching screws and torque
to specifications;
8. If only the pan has been removed, pour approximately
7-1/2 pints of fluid into the transmission. If the
valve body has also been removed use 9-1/2 pints.
After a complete overhaul approximately 19 pints
are required. Be sure container, spout, or funnel is
clean.
9. Start engine and let idle (carburetor off fast idle
step).
Place selector lever in P position and apply
hand brake.
10.
With transmission warm (approximately 150°F), add
fluid to bring level to full mark on indicator.
CAUTION: Do not overfill. Foaming will re-
sult.
CHEVROLET CHASSIS SERVICE MANUAL
CLUTCH AND TRANSMISSIONS 7-41
CAUTION: Use converter holding ToolJ-5384
when lowering transmission or keep rear of
transmission lower than front so as not to lose
converter.
The installation of the transmission is the reverse of
the removal.
TURBO HYDRA-MATIC DIAGNOSIS PROCEDURE
Accurate diagnosis of transmission problems begins
with a thorough understanding of normal transmission
operation. In particular, knowing which units are in-
volved in the various speeds or shifts so that the specific
units or circuits involved in the problem can be isolated
and investigated further. Analytical diagnosis will pro-
tect the technician from come backs and certainly will
improve owner satisfaction.
An important and often overlooked aspect of diagnosis
is finding out specifically what the customer is com-
plaining of. For this purpose a short ride with the cus-
tomer will often prove beneficial. It may be found that
the condition the customer wants corrected is standard
and should not be altered.
The following sequence, based on field experience, pro-
vides the desired information quickly and in most cases
actually corrects the malfunction without requiring the
removal of the transmission. Details of the items listed
in this sequence are covered further in the text.
SEQUENCE FOR TURBO HYDRA-MATIC
DIAGNOSIS PROCEDURE
1.
Check oil level and condition.
2.
Check and correct detent switch.
3.
Check and correct vacuum line and fittings.
4.
Check and correct manual linkage.
OIL LEVEL AND CONDITION CHECK
Always check the oil level before road testing. Oil
must be visible on dip stick prior to operating the ve-
hicle. Erratic shifting, pump noise, or other malfunc-
tions can in some cases be traced to improper oil level.
Oil level should be checked with the selector lever in
the Park (P) position, engine running, and the vehicle on
level pavement.
Fluid level should be to the FULL mark with the trans-
mission at normal operating temperature (170°-190°
F.).
With warm fluid (room temperature), the level should be
at or slightly below the ADD mark.
If oil level was low, refer to Oil Leaks.
The condition of the oil is often an indication of whether
the transmission should be removed from the vehicle, or
to make further tests. When checking oil level, a burned
smell and discoloration indicate burned clutches or bands
and the transmission will have to be removed.
MANUAL LINKAGE
Manual linkage adjustment and the associated neutral
safety switch are important from a safety standpoint
The neutral safety switch should be adjusted so that the
engine will start in the Park and Neutral positions only.
With the selector lever in the Park position, the park-
ing pawl should freely engage and prevent the vehicle
from rolling. The pointer on the indicator quadrant
should line up properly with the range indicators in all
ranges.
OIL LEAKS
Before attempting to correct an oil leak, the actual
source of the leak must be determined. In many cases,
the source of the leak can be deceiving due to "wind flow"
around the engine and transmission.
The suspected area should be wiped clean of all oil be-
fore inspecting for the source of the leak. Red dye is
used in the transmission oil at the assembly plant and
will indicate if the oil leak is from the transmission.
. The use of a "black light"* to identify the oil at the
source of leak is also helpful. Comparing the oil from
the leak to that on the engine or transmission dip stick
(when viewed by black light) will determine the source
of the leak.
Oil leaks around the engine and transmission are gen-
erally carried toward the rear of the car by the air
stream. For example, a transmission "oil filler tube to
case leak" will sometimes appear as a leak at the rear of
the transmission. In determining the source of an oil
leak it is most helpful to keep the engine running.
POSSIBLE POINTS OF OIL LEAKS
• 1. TRANSMISSION OIL PAN LEAK
a. Attaching bolts not correctly torqued.
b.
Improperly installed or damaged pan gasket.
c. Oil pan gasket mounting face not flat.
2.
REAR EXTENSION LEAK
a. Attaching bolts not correctly torqued.
b.
Rear seal assembly — damaged or improperly
installed.
c. Gasket seal — (extension to case) damaged or
improperly installed.
d. Porous casting.
3.
CASE LEAK
a. Filler pipe "O" ring seal damaged or missing;
misposition of filler pipe bracket to engine —
"loading" one side of
"O"
ring.
b.
Modulator assembly "O" ring seal
—
damaged or
improperly installed.
c. Governor cover, gasket and bolts — damaged,
loose; case face leak.
d. Speedo gear
—
"O" ring damaged.
e. Manual shaft seal — damaged, improperly in-
stalled.
f. line pressure tap plug — stripped, shy sealer
compound.
g. Parking pawl shaft cup plug
—
damaged, improp-
erly installed.
h. Vent pipe (refer to Item 5).
i. Porous case.
4.
FRONT END LEAK
a. Front seal - damaged (check converter neck for
nicks,
etc., also for pump bushing moved for-
ward);
garter spring missing from pump to con-
verter seaL
b.
Pump attaching bolts and seals
—
damaged, miss-
ing, bolts loose.
CHEVROLET a
SERVICE
CLUTCH AND TRANSMISSIONS 7-45
23
Fig.
5T - Aluminum Powerglide Special Tools
1. J-9506
2.
J-3289-01
3.
J-9549
4.
J-21867
5.
J-4264
6. J-3387
7.
J-9539
8. J-6839
9. J-9546
10.
J-7782
11.
J-5133
12.
J-4599
13.
J-9542
14.
J-9557
Holding Fixture Adapters
Holding Fixture (Use with J-3289-20 Base)
Converter Safety Strap
Transmission Pressure Gauge and Hose
Oil Filler Tube and Funnel
Pilot Stud Set
Front Pump Puller Bolts (Use with weights
from Slide Hammers J-6585)
Front Pump Seal Driver
Clutch Drum Bushing Remover and Installer
Clutch Spring Compressor Adapter Plate
Clutch Spring Compressor
Planet Pinion Assembly Tool Set
Reverse Piston Spring Compressor
Transmission Case Rear Bushing Remover and
Installer and Rear Pump Bushing Remover
15.
J-7079
16.
J-6582
17.
J-9543
18.
J-5778
19.
J-5154
20.
J-5403
21.
J-5814
22.
J-5853
23.
J-8039
24.
J-21848
J-8001
J-5492
J-6585
J-6585-3
J-9534
Handle
Rear Pump Bushing Installer
Vacuum
Modu
lator Wrench
Extension Bushing Remover and Installer
Extension Oil Seal Installer
Snap Ring Pliers
Speedometer Drive Gear Remover and
Installer
Torque Wrench
Snap Ring Pliers
Low Band Adjusting Tool
Dial Indicator (Not Illustrated)
Dial Indicator Support Strap (Not Illustrated)
Slide Hammers (Not Illustrated)
Slide Hammer Adapters (Not Illustrated)
Bushing Remover (Not Illustrated)
CHEVROLET CHASSIS SERVICE MANUAL
CLUTCH AND TRANSMISSIONS 7-47
Fig.
7T - Turbo Hydro-Matic Special lools
1;
J-8763
2.
J-3289-14
3. J-21427-1
4.
J-9539
5. J-8105
6. J-21885
7. J-21369
8. J-21362
Transmission Holding Fixture
Holding Fixture Base
Speedo Gear Remover
Slide Hammer Bolts (3/8" - 16 Threads)
Speedo Gear Remover Puller
Accumulator Piston Installer
Converter Pressure Check Fixture
Seal Protector - Forward & Direct Clutch - Inner
9. J-21363
10.
J-21409
11.
J-21664
12.
J-4670
13.
J-8059
14.
J-5586
15.
J-5403
16.
J-1313
Seal Protector - Intermediate Clutch - Inner
Seal Protector - Forward Clutch - Outer
Clutch Spring Compressor Adapter Ring
Clutch Spring Compressor
Snap Ring Pliers
Snap Ring Pliers
Snap Ring Pliers
Torque Wrench 0-140 Ft. Lbs.
CHEVROLET CHASSIS SERVICE MANUAL
FUEL TANK
AND
EXHAUST SYSTEMS
8-5
EXHAUST SYSTEMS
INDEX
Page
General Description
. . 8-5
Component Part Replacement
8-5
Muffler Assembly.
8-5
Exhaust Pipes.
8-5
Tail Pipes.
8-5
GENERAL DESCRIPTION
All exhaust systems used
on the 1967
Chevrolet
are
exhaust systems
(fig. 7) are
available
as
regular produc-
the split system type
in
which the. component parts
are
tion equipment
on the 427 cu. in.
displacement
V-8 en-
secured together with clamps.
The
single exhaust system gines
and as an
option
on the
other (except
283 cu. in.)
used
on L-6
engine models
(fig. 6)
consists
of an
exhaust
V-8
engines. These systems consist
of two
exhaust
pipe, muffler, tailpipe
and
attaching hardware.
On V-8
pipes, mufflers, tailpipes with resonators
and
attaching
engine single exhaust models
a
crossover pipe
is
added hardware.
All
exhaust systems
are
suspended on brackets
to connect
the
right exhaust manifold
to the
system. Dual with insulators
for
rattle free operation.
COMPONENT PART REPLACEMENT
Care should
be
taken
to
have
the
exhaust pipe, muffler
or tail pipe
in
proper relation with each other. Incorrect
alignment frequently causes annoying rattles
due to in-
correct clearances.
MUFFLER ASSEMBLY
Remove
and
Replace
1.
Remove "U" bolt clamp
at
center mounting.
2.
Remove
"U"
bolt clamp
at
forward
end of
muffler
pipe.
3.
Disengage muffler
at
exhaust
and
tail pipe
connections.
4.
Three-fourths inch clearance should
be
allowed
be-
tween
the
muffler bracket (hanger)
and
crossmember
at installation.
5. Install unit with
the
flat side
of the
muffler showing.
EXHAUST PIPE (CROSSOVER WITH
V-8
ENGINE)
Remove
and
Replace
1.
Remove
two
nuts, extension
and
packings-separate
pipe from manifold.
2.
3.
Disassemble
pipe.
"U"
damp from muffler
and
remove
Attach pipe
to
muffler, then secure
to
manifold. Note
clearances
for the
standard
and
automatic control
linkages, underbody
and
crossmember. Contact
of
exhaust pipe
to
engine panrail
is
permissible.
4.
Tighten nuts uniformly.
TAIL PIPE AND/OR RESONATOR
Remove
and
Replace
1.
Remove
"U"
clamp attachment
at
muffler.
2.
Remove screw attachment
at
tail pipe rear hanger
assembly.
3.
Remove tail pipe.
4.
Replace tail pipe
at
muffler, then install
at
hanger
Do
not
secure attachments until clearances have been
checked. Check position
of
hanger
so
that interplates
are parallel.
5. Torque nuts
7-9 ft. lbs. at
hanger
and 10-15 ft. lbs.
at muffler.
CHEVROLET CHASSIS
SEI