lock CHEVROLET CAMARO 1967 1.G Chassis Workshop Manual

STEERING 9-23

Fig.
47—I retaliating Spherical Joint Spring

upper shaft should be on the same side as the

flat on the lower shaft.

d. Install the upper shaft with spheres into the lower

shaft.

e. Insert the joint preload spring through the

spheres into the lower shaft. Using the upper

shaft to hold the spring in place, carefully feed

the spring into the upper shaft joint with a narrow

bladed screwdriver (fig. 47).

17.
Slide the race and bearing over the top of steering

shaft and install shaft in shift tube from upper end.

Carefully guide shaft through shift tube, taking care

not to tear or push out foam seal cemented inside

lower end of shift tube.

18.
Install tilt control lever and, holding lock shoes in

disengaged position, assemble bearing housing on the

shaft over the support until pivot pin holes line up.

19.
Secure bearing housing in position by pressing in the

pivot pins.

20.
Place housing in full up position and install tilt

spring, tapered end first. Install tilt spring retainer

using screwdriver in retainer slot.

21.
Install turn signal switch with three mounting

screws. Place short length screw in top position

above lock shoes.

NOTE:
If the steering shaft, adapter, mast

jacket, support or bearing housing has been,

replaced, the component stack-up in the column

will be different. Replace the lower plastic in-

jected tolerance ring and the lower bearing pre-

load spring with the necessary tolerance ring

kit as described below.

22.
Slide kit spring, tolerance ring kit, washers, and

retaining ring on steering shaft from lower end.

Seat retaining ring in steering shaft groove.

23.
Screw tolerance ring kit sections together leaving

enough inner edge exposed for later adjustment as

shown in Figure 35.

24.
Install inner race, inner race seat, and bearing lock-

nut on end of steering shaft, using locknut wrench

ToolJ-22599 (fig. 39).

25.
Remove any remaining looseness from internal col-
umn stack-up by unscrewing inner tolerance kit ring

section; then screw inner ring section back in 1/8 to

1/4 turn (fig. 36).

26.
Tighten bearing locknut installed in Step 24 above

until the torque required to rotate the steering shaft,

with the housing in the mid position, is 23 lb. in.

27.
Touch the outer surface of the tolerance ring kit at

several locations with a hot soldering iron to melt

the threads of the inner and outer sections together.

28.
Check to insure hazard warning switch is pushed in.

Remove tilt release control lever and install turn

signal switch cover using turn signal cover installer

Tool J-21853 (fig. 48). On automatic column, be sure

key in the cover is aligned with keyway in bearing

housing.

29.
Place turn signal control lever in position and se-

cure with mounting screw. Screw tilt release control

lever in. Screw hazard warning knob in.

30.
On automatic columns, place transmission shift con-

trol lever in position and insert lever retaining pin.

31.
On automatic columns to be installed in a Camaro,

insert the bulb and cap into the turn signal switch

housing (fig. 33). Slide pointer into position in bowl.

Install dial and dial retainer with mounting screws

removed during disassembly.

32.
Install steering shaft flange on bottom of shaft and

secure with flange bolt.

33.
Remove column from vise. Pull wires back against

column leaving a small amount of slack. Snap wiring

protector into position. Be sure enough slack re-

mains in wires to allow column head to tilt to full

up position.

34.
If mesh cover was removed, wrap mesh cover around

mesh portion of jacket and secure with friction or

electricians tape.

35.
Slide cancelling cam and cancelling cam spring on

upper end of shaft.

Disassembly—Standard Corvette Column (Fig. 49)

1.
Place column on a suitable work bench.

2.
Remove upper bearing preload spring and cancelling

cam from end of column.

3.
Slide escutcheon clear of wiring protector and re-

move protector.

4.
Remove turn signal lever retaining screw and re-

move lever. Push hazard warning knob in; unscrew

and remove knob.

Fig.
48—Installing Turn Signal Switch Cover Using

Signal Switch Installer Tool J-21853

CHEVROLET CHASSIS SERVICE MANUAL

STEERING
9-26

Fig.
54—Corvette Telescoping Column—Exploded View

1.
Wiring Protector

2.
Screw

3. Screw

4. Turn Signal Switch

5. Upper Bearing

Housing

6. Signal Switch Cover

7. Escutcheon
8

9

10

11

12

13

14
8.
Mast Jacket

9. Bumper

Key

Bumper

Bumper Key Strap

Steering Wheel Nut

Upper Bearing Preload

Spring
15.
Cancelling Cam

16.
Retaining Ring

17.
Thrust Washer

18.
Wave Washer

19.
Retainer

20.
Bearing

21.
Spring

22.
Washer
23. Retaining Ring

24.
Lower Steering

Shaft

25.
Upper Steering

Shaft

26.
Locking
Rod

27.
Wedge

Disassembly—Corvette Telescoping Column (Fig. 54).

1.
Place column on a suitable work bench.,

2.
Remove upper bearing preload spring and cancelling

cam from end of shaft.

3.
Remove turn signal lever retaining screw and re-

move lever. Push hazard warning knob in; unscrew

and remove knob.

4.
Remove upper retaining ring from upper steering

shaft using a screwdriver. Remove thrust washer

and wave washer. -

5. Remove three- screws from the lower bearing

retainer.
6. Carefully slide steering shaft assembly out of lower

end of mast jacket.

7. Remove flange bolt and flange from lower end of

shaft. -

CAUTION: Use caution when removing the low-

er retaining ring in the following step. The lower

bearing washer is under load from the com-

pressed spring and could cause injury when the

lower retaining ring is removed.

8. Carefully remove lower retaining ring as shown in

Figure 55. Remove washer* spring, packing, and

CHEVROLET CHASSIS SERVICE MANUAL

STEERING 9-27

Fig.
55— Removing Lower Bearing Retaining Ring

bearing assembly from lower end of shaft.

9. Push upper steering shaft section into lower section

until spring pin is visible at pin access hole in lower

section. Drive out spring pin.

10.
Remove upper shaft section from lower section. If

necessary, replace locking wedge and locking rod at

this time.

11.
Remove bumper key strap (fig. 56). Remove keys and

bumper assembly.

12.
Remove screws securing bottom of wiring protector

to column.

13.
Slide inner jacket section, switch cover, switch,

upper bearing housing, wiring protector, and es-

cutcheon off top end of jacket.

14.
If necessary, remove three turn signal switch mount-

ing screws and remove switch and upper bearing

housing.

15.
If necessary, remove seals from I.D. of mast jacket.

16.
If necessary, unwrap mesh cover from jacket.

Assembly—Corvette Telescoping Column (Fig. 54)

1.
Apply a thin coating of lithium soap grease to all

friction surfaces.

2.
If seals were removed from I.D. of mast jacket,

cement new seals in positions where old seals were

removed.

3.
Place locking wedge and locking rod into upper shaft

and slide upper shaft into lower shaft.

4.
Align upper and lower shafts and insert spring pin

into access hole.

5. Install bearing, packing, spring, washer, and retain-

ing ring on bottom of steering shaft. Seat the re-

taining ring into the steering shaft groove with a

screwdriver.

6. Carefully slide steering shaft into lower end of mast

jacket.

7. Install bearing retainer over lower end of shaft and

lower end of jacket. Secure retainer with three

screws.

8. Install flange and flange bolt on lower end of steering

shaft.

9. Feed wires of turn signal switch through turn signal

switch cover and escutcheon, and place switch and

upper bearing housing in cover. Secure switch to

cover with three mounting screws.
10.
Place wiring protector inside escutcheon.

11.
Start escutcheon and wiring protector, with signal

switch wires, over end of outer jacket.

12.
Slide inner jacket section into outer jacket section.

13.
Secure switch cover to flange of inner jacket section

by tightening the signal switch mounting screws.

14.
Secure the bottom of the wiring protector to the col-

umn with two screws.

15.
Assemble keys and bumper and place the entire as-

sembly in position in the jacket. Install bumper key

strap.

16.
Slide wave washer, thrust washer, and upper retain-

ing ring into place at top of shaft. Seat retaining ring

in steering shaft groove with a screwdriver.

17.
Place turn signal switch lever in position and secure

with screw. Screw hazard warning knob into position.

18.
If mesh cover was removed, wrap mesh cover around

mesh section of jacket and secure with electricians

or friction tape.

19.
Slide cancelling cam and upper bearing preload

spring over top end of shaft.

Installation

NOTE:
Before placing column in position in

vehicle, refer to figures 19 through 23 and slide

dash panel seals, covers, plates, and clamps

loosely into position on column for later

installation.

1.
Move front seat back as far as possible to provide

Fig.
56—Removing Bumper Key Strap

CHEVROLET CHASSIS SERVICE MANUAL

STEERING 9-29

column mounting bracket, and place bracket in cor-

rect position on underside of instrument panel.

Loosely install bracket using bracket to column

mounting screws and bracket to instrument panel

washers and bolts.

NOTE: Steering shaft to gear clamp must be

tightened before column attaching bolts are

torqued. Refer to "Steering Gear-Chevy n",

installation procedure, for correct Chevy II

steering column alignment procedure.

5.
Camaro only (fig. 60):

Lay wedge shim in position on instrument panel

column mounting bracket and place bracket in cor-

rect position on underside of instrument panel.

Loosely install bracket using bracket to column

mounting screws, nuts, and washer and bolt as shown

in Figure 60.

6. Corvette only (fig. 61):

Loosely secure column mounting bracket to sup-

port plate and instrument panel with washers and

bolts.

7.
Secure flanged end of column to steering coupling

with lockwashers and nuts. On Chevy n, connect col-

umn to steering gear with clamp, clamp bolt, and

nut. On Corvette, slide steering shaft flange into

lower coupling
half,
and install upper clamp bolt

loosely; also secure support, seal and clamp loosely

at dash on engine side.

8. Tighten instrument panel mounting bracket bolts and

nuts.
Refer to torque specifications at rear of manual

for correct torque values.

9. Chevrolet only (fig. 15):

Place upper and lower mast jacket covers in po-

sition and secure covers together and to instrument

panel using nuts and screws as shown in Figure 15.

10.
Chevy H only (fig. 18):

Place lower mast jacket cover in position under

mast jacket and secure to upper cover with screws.

11.
CheveUe only (fig. 15):

Place mast jacket trim cover in position over col-

Fig.
61—Instrument Panel Mounting Bracket and

Support Plqte—Corvette
umn on underside of instrument panel and secure

with screws.

12.
Corvette only (fig. 14):

Slide escutcheon into position at instrument panel

and secure with screws. Place upper end lower

covers in position and secure with screws.

13.
On Chevrolet and CheveUe models with column

mounted powerglide controls, secure transmission

shift indicator pointer into position with set screw

(fig. 15). ,

14.
Chevrolet only (fig. 19):

a. Secure seal and cover to dash panel with screws.

b.
Place clamp assembly in position and install

clamp screw.

c. Install dash panel trim cover with mounting

screws.

15.
Chevelle only (fig. 20):

a. Secure seal and inner and outer covers to dash

panel with screws.

b.
Secure inner and outer covers together with

screws.

c. Install trim cover to dash panel with two

retainers.

16.
Chevy H only (fig. 21):

a. Secure seal, retainer, and clamp to dash panel

with screws.

b.
Install clamp screw.

c. Slide collar into position. Pinch and staple upper

tabs together.

17.
Camaro only (fig. 22):

a. Secure seal, upper cover, and lower cover to

dash panel with screws.

b.
Secure upper and lower cover together with

screws.

c. Fold rubber boot over securely against dash panel

to conceal covers.

18.
Corvette only (fig. 23):

a. Secure seal and support assembly to dash panel

on engine compartment side.

b.
Tighten clamp, washer, and clamp bolt on engine

compartment side.

19.
Connect transmission linkage to lower shift tube

levers in engine compartment, if column is so

equipped. Adjust levers as outlined in Section 7.

20.
Install steering wheel as outlined in this section.

21.
Connect directional signal, horn, back-up lamp, and

neutral start switch at wiring harness plugs. Adjust

back-up lamp, neutral start switch as outlined in

Section 12.

22.
Adjust steering gear and align and center steering

wheel as outlined in this section.

STEERING LINKAGE (Fig. 62)

TIE RODS

There are two tie rod assemblies used on all models.

Each assembly is of three piece construction, consisting

of a sleeve and two tie rod ends. The ends are threaded

into the sleeve and locked with clamps. Right and left

hand threads are provided to facilitate toe-in adjustment

and steering gear centering.

The tie rod ends are self-adjusting for wear and re-

quire no attention in service other than periodic lubrica-

tion and occasional inspection to see that ball studs are

tight. Replacement of tie rod ends should be made when

CHEVROLET CHASSIS SERVICE MANUAL

STEERING 9-31

Fig.
63—Freeing Ball Stud

rod threads with EP Chassis lube and install ends on

tie rod making sure both ends are threaded ah equal

distance from the tie rod.

2.
Make sure that threads on ball stud and in ball stud

nuts are perfectly clean and smooth. Install neoprene

seals on ball studs.

NOTE: If threads are not clean and smooth,

ball studs may turn in tie rod ends when at-

tempting to tighten nut.

3.
Install ball studs in steering arms and relay rod.

4.
Install ball stud nut, and install cotter pins. Lubri-

cate tie rod ends.

5.
Adjust toe-in as described in Section 3.

NOTE: Before locking clamp bolts on the rods,

make sure that the tie rod ends are in alignment

with their ball studs (each ball joint is in the

center of its travel). If the tie rod is not in

alignment with the studs, binding will result.

RELAY ROD-ALL MODELS EXCEPT CORVETTE

Removal

1.
Remove inner ends of tie rods from relay rod as

described under Tie Rod - Removal.

2.
Remove cotter pin and nut from relay rod ball stud

attachment at pitman arm.

3.
Detach relay rod from pitman arm. Shift steering

linkage as required to free pitman arm from relay

rod.

4.
Remove cotter pin and nut from idler arm and re-

move relay rod from idler arm.

Installation

1.
Install relay rod to idler arm, making certain idler

stud seal is in place, then install and tighten nut.

Advance nut just enough to align castellation with

cotter pin hole and install pin.

2.
Raise end of rod and install on pitman arm. Secure

with nut and cotter pin.
3.
Install tie rod ends to relay rod as previously

described under Tie Rods. Lubricate tie rod ends.

4.
Adjust toe-in (see Section 3) and align steering wheel

as described previously in this section under Steer-

ing Wheel Alignment and High Point Centering.

RELAY ROD-CORVETTE

Removal

1.
Remove steering damper from relay rod as outlined

under Steering Damper-Removal. Remove anchor

bracket from relay rod by disconnecting two mount-

ing bolts.

2.
Remove inner ends of tie rods from relay rod as

described under Tie Rod--Removal.

3.
Remove cotter pin from end of relay rod at pitman

arm ball stud attachment, and remove stud nut.

4.
Tap brJl stud out of pitman arm and lower relay rod.

5.
Remove cotter key and nut from idler arm and re-

move relay rod from idler arm. Remove washer and

seal from idler arm.

Installation

1.
Place relay rod on idler arm stud, making certain

idler stud seal and washer are in place, then install

and tighten nut. Advance nut just enough to align

castellation with cotter pin hole and install pin.

2.
Install new seal and clamp over ball at end of pitman

arm.

3.
Install inner spring seat and spring to relay rod.

4.
Raise end of rod and install on pitman arm.

5.
Install spring seat, spring, and end plug.

6. Tighten end plug until springs are compressed and

plug bottoms, then back off 3/4 turn plug amount

necessary to insert cotter pin. Insert cotter pin to

lock adjustment.

7.
Install tie rod ends to relay rod as previously de-

scribed under Tie Rods.

8. Lubricate tie rod ends and pitman arm to relay rod

ball joint.

9. Install steering damper bracket and tighten bolts.

Install damper as outlined under Steering Damper--

Installation.

10.
Adjust toe-in and align steering wheel as described

previously in this section.

IDLER ARM

Chevrolet, Chevelle, Comoro, and Corvette (Fig. 62)

Removal

1.
Remove idler arm to frame nut, washer, and bolt.

No washer is used on Corvette.

2.
Remove cotter pin and nut from idler arm to relay

rod ball stud.

3.
Remove relay rod from idler arm by tapping relay

rod with a hammer using a heavy hammer as a

backing.

4.
Remove idler arm.

Installation

1.
On Chevrolet, place seal in position on idler arm

stud; position stud up through frame, and secure with

lock washer and nut.

2.
On Chevelle, Camaro, and Corvette, position idler

CHEVROLET CHASSIS SERVICE MANUAL

STEERING
9-32

arm on frame and install mounting bolts, washers

and nuts. No washer is used on Corvette.

Install relay rod to idler arm, ^making certain seal

is on stud. Install and tighten nut.

Install cotter pin.

Refer to torque specifications at rear of manual for'

correct torque values.

Chevy II (Fig. 62}

Removal

1.
Remove cotter pin, nut and washer securing idler

arm to relay rod.

2.
Remove relay rod from idler arm.

3.
If equipped with power steering disconnect power

cylinder shaft from idler arm bracket.

4.
Remove three idler bracket to frame bolts and nuts

and remove bracket and idler arm assembly.

5.
Remove cotter pin, nut, washer and bolt securing the

idler arm to the bracket.

6. Press out the idler arm bushing for replacement.

Installation

NOTE: Installation must be done with front

wheels straight ahead or the car will lead to one

side.

1.
Install idler arm bushing, if previously removed.

NOTE: Make certain the outer sleeve of the

bushing does not protrude above surface of idler

arm.

2.
Reverse removal procedure and torque all nuts ac-

cording to specifications.

PITMAN ARM

Removal

1.
Remove cotter pin from pitman arm ball stud and

remove nut.

2.
Remove relay rod from pitman arm by tapping on

side of rod or arm in which the stud mounts with a

hammer while using a heavy hammer or similar tool

as a backing. Pull down on relay rod to remove

from stud.

3.
Remove pitman arm nut from sector shaft and mark

relation of arm position to shaft.

4.
Remove pitman arm with Tool J-6632 as shown in

Figure 2.

Installation

1.
Install pitman arm on sector shaft, lining up the

• marks made upon removal.

2.
Install sector shaft nut.

3.
Position relay rod on to pitman arm. Install nut.

Continue to tighten arm enough to align castellation

with hole in stud and install cotter pin.
STEERING ARM

If, through collision or other damage, it becomes nec-

essary to remove and replace either steering arm, pro-

ceed as follows:

Removal

1.
Remove tie rod from steering arm as outlined in this

section.

2.
Remove front wheel, hub and brake drum as a unit

by removing hub cap and dust cap, cotter pin from

spindle nut and the spindle nut. Pull assembly to-

ward outside of vehicle. If removal is difficult, it

may be necessary to back off brake adjustment to

increase brake shoe-to-drum clearance; see Hy-

draulic Brake Adjustment, Section 5. On models

with disc brakes, remove caliper and disc.

3.
With wheel and drum assembly or caliper and disc

removed, steering arm retaining bolt heads are ac-

cessible and removal of steering arm from vehicle

may be accomplished by removing retaining nuts.

Installation

1.
Place steering arm in position on vehicle and install

retaining bolts*

2.
Install nuts. Use only the special locknut listed for

this use in the Chevrolet Parts Catalog.

3.
Pack wheel bearings using a high quality wheel

bearing lubricant. Install bearings and wheel-hub-

brake drum assembly removed previously. On disc

brake models, install disc and caliper.

4.
Install keyed washer and spindle nut. Proceed as out-

lined under t{ Front Wheel Bearing Adjustment" in

Section 3.

5.
Install tie rod ball stud in steering arm. Be sure that

the dust cover is in place on ball stud.

6. Install castellated nut on ball stud, tighten securely

and install cotter pin.

7.
Following directions given in Section 3 to check cor-

nering wheel relationship and toe-in; correct as

required.

STEERING DAMPER-CORVETTE

Removal

1.
Remove bolt from damper pivot bracket at relay rod.

2.
Remove nut from damper pivot at frame bracket and

withdraw damper assembly.

Damper is serviced as a unit. Replace damper if
3.

damaged or excessively worn.

Installation

1.
Place piston rod end into frame bracket and install

retainers, bushings, and nut.

2.
Insert cylinder end pivot into relay rod bracket and

install through bolt.

CHEVROLET CHASSIS SERVICE MANUAL

STEERING 9-36

Fig.
68—Power Steering Gear—Chevrolet Shown

Installation

1.
Install pump pulley.

CAUTION: Do not hammer on pump shaft. Use

pulley nut to pull pulley on to shaft.

2.
Position pump assembly on vehicle (Fig. 67) and in-

stall attaching parts loosely.

3.
Connect and tighten hose fittings.

4.
Fill reservoir. Bleed pump by turning pulley back-

ward (counterclockwise as viewed from front) until

air bubbles cease to appear.

5. Install pump belt over pulley.

6. Tension belt as outlined under "Pump Belt Tension

Adjustment" in this section.

7. Bleed as outlined under "Maintenance and

Adjustments."

POWER STEERING GEAR (Fig. 68)

Chevrolet,
Chevelfe,
and Comoro

Replacement procedures for the power steering gear

are the same as for the manual type steering gear.
•
Refer

to steering gear procedures near the beginning of this

section under "Component Replacement and Repairs".
In addition, disconnect pressure and return hoses from

the steering gear housing. Cap both hoses and steering

gear outlets to prevent foreign material from entering

the system. After service is performed and steering gear

is installed, connect the pressure and return hoses to

the steering gear housing. Bleed system as outlined

under Maintenance and Adjustment in this section. Refer

to torque specifications at rear of manual for correct

torque values.

CONTROL VALVE AND ADAPTER ASSEMBLY

Chevy II and Corvette

Ball Stud Seal Replacement (Fig. 69)

A ball stud seal is used on the power steering control

valve. To replace the seal:

1.
Remove the pitman arm as outlined under "Steering

Linkage" in this section.

2.
Remove clamp by removing nut, bolt and spacer or,

if crimped type clamp is used, straighten clamp end

and pull clamp and seal off end of stud.

3.
Install new seal and clamp over stud so lips on seal

mate with clamp. (A nut and bolt attachment type

clamp replaces the crimped type for service.)

CHEVROLET CHASSIS
SERVICE
MANUAL

STEERING 9-40

SPECIAL TOOLS

1.
J-22572 Steering Column Bearing

Installer

2.
J-8937 Power Piston Ball Seat

Installer

3. J-6632 Pitman Arm Puller

4.
J-5178 Pull Gauge

5. J-2927 Steering Wheel Puller

6. J-21486 Actuator Cover Remover

7. J-6585 Slide Hammer

8. J-22599 Lock Nut Wrench

9. J-21854 Pivot Pin Remover
Fig.
72—Special Tools

10.
J-22549 Shift Tube Installer

11.
J-22551 Shift Tube Remover

12.
J-5421 Thermometer

13.
J-22635 Locking Shoe Guide Pin

and Release Lever Pin

Remover and Installer

14.
J-7754 Inch Pound Torque

Wrench

15.
J-22569 Snap Ring Remover and

Installer
16.
J-2185'3

17.
J-22568

18.
J-22670

19.
J-22686

20.
J-8433

21.
J-21239

22.
J-22573

23.
J-7316

24.
J-5176
Actuator Cover Installer

Spanner Wrench

Pump Main Shaft Seal

Installer

End Play Gauge

Pump Pulley Remover

Pump Pulley Remover

Column Support Fixture

Belt Tension Gauge

Pressure Gauge

CHEVROLET CHASSIS SERVICE MANUAL

WHEELS AND TIRES 10-2

either case, tires will revolve with a side motion and

scrape the tread rubber off. If misalignment is severe,

the rubber will be scraped off of both tires (or all four

tires if front toe is not correct); if slight, only one will

be affected.

The scraping action against the face of the tire causes

a small feather edge of rubber to appear on
one .side
of

the tread and this feather edge is certain indication of

misalignment (fig. 1). The remedy is. readjusting toe-in

within specifications, or rechecking the entire front end

alignment if necessary.

Heei and Toe

This is a saw-toothed effect where one end of each

tread block is worn more than the other.

The end that wears is the one that first grips the road

when the brakes are applied.

Heel and toe wear is less noticeable onsrear tires than

on front tires, because the propelling action of the rear

wheels creates a force which tends to wear the opposite

end of the tread blocks. The two forces, propelling and

braking, make for more even wear of the rear tires,
whereas only the braking forces act on the front wheels,

and the saw-tooth effect is more noticeable.

A' certain amount of heel and toe wear is normal.

Excessive wear is usually due to high speed driving and

excessive use of brakes. The best remedy, in addition

UNDERINFLATION WEAR

Fig.
1 - Toe In or Toe Out Misalignment Wear
Fig.
2 - Over and Under Inflation Wear

CHEVROLET CHASSIS SERVICE MANUAL

WHEELS AND TIRES 10-4

the road and it slips, grinding off the tread on the inside

half of the tire at an excessive rate. This type of tire

shows much the same appearance of tread wear as tire

wear caused by negative camber.

Second, the transfer of weight may also over-load the

outside tires so much that they are laterally distorted

resulting in excessive wear on the outside half of the

tire producing a type of wear like that caused by ex-

cessive positive camber.

Cornering wear can be most easily distinguished from

abnormal camber wear by the rounding of the outside

shoulder or edge of the tire and by the roughening of the

tread surface which denotes abrasion.

Cornering wear often produces a fin or raised portion

along the inside edge of each row in the tread pattern.

In some cases this fin is almost as pronounced as a

toe-in fin, and in others, it tapers into a row of tread

blocks to such an extent that the tire has a definite step

wear appearance.

The only remedy for cornering wear is proper in-

struction of owners.

Fig.
5 - Tire Rotatidh

Rotation

To minimize the possibility of tire noise and to equal-

ize tire wear, it is recommended that tires be inter-

changed every 6000 miles as shown in Figure 5 or more

frequently in the case of extremely heavy wear.

NOTE:
Rotate Corvette tires at 4000 miles or

sooner.

Interchanging tires will effectively prevent undue wear

on any particular tire. II tire interchanging is followed

as recommended above, all tires will have the same

number of miles in each wheel position at the end of the

fourth change. When interchanging tires, inspect for

signs of abnormal wear, bulging, etc., stones, glass, and

nails should be removed before reinstallation.

Noise

Noise caused by the normal action of tire treads on

various road surfaces is often confused with rear axle
gears or other noises in the car.

The determination of whether tires are causing the

noise complained of is relatively simple. The car should

be driven at various speeds and note taken of part

throttle, and sudden acceleration and deceleration. Axle

and exhaust noises show definite variations under these

conditions, while tire noise will remain constant. Tire

noise is, however, most pronounced at speeds of approx-

imately twenty or thirty miles per hour.

The tires may be further checked by driving the ear

over smooth pavement with the tires at normal pressure

and again over the same stretch of pavement when the

tires have been inflated to fifty pounds pressure. Reduce

the tires to normal pressure one at a time to determine

the faulty tire or tires. This high inflation pressure

should immediately be reduced to normal after test. If

the noise for which the test is being made is caused by

tires,.
it will noticeably decrease when the tire pressure

is increased, whereas axle noise should show no change

in volume.

If, on inspection, the tires on the front wheels are

found to be creating most of the noise the alignment of

the front wheels should be checked. Excessive tire noise

usually results from lower than recommended tire pres-

sure, incorrect alignment, uneven tire wear, or defective

(thumper) tire.

Cleaning

A great deal of ordinary road dirt which collects on

white sidewall tires may be sponged off with clear water

or a mild soap solution.

A good brand of whitewall tire cleaner, however, is

a quicker and more effective cleaner for removing dirt

and stains from whitewall tires and in many cases it

will remove stains and discoloration that the simpler

method of soap and water will not remove.

Under no circumstances should gasoline, kerosene or

any cleaning fluid containing a solvent derived from oil

be used to clean whitewall tires. Oil in any form is

detrimental to tire rubber and a cleaner with an oil base

will discolor or injure whitewall tires.

Change (W/Wheels)

To change the road wheels using the jack that comes

with the car, observe the following procedure:

1.
Set hand brake and block front wheels if rear wheel

is being changed.

2.
Remove hub cap or wheel disc and break wheel

mounting nuts loose.

3.
Place the jack as directed tinder, General Informa-

tion,
Section 0 and raise car until wheel clears

ground.

4.
Remove wheel mounting nuts and remove wheel from

hub or drum.

5. To replace road wheel, reverse the above instrue-

. tions. Proper torque on nuts is 55-75 ft. lbs.

torque (70-85 ft. lbs. for Corvette aluminum wheel

nuts).

CAUTION: On models equipped with discs, in-

dex the pilot hole in the disc on the valve stem.

(To insure that the anti-rotation notches in wheel

disc register on lugs in wheel rim.)

CHEVROLET CHASSIS SERVICE MANUAL