radiator CHEVROLET CAMARO 1967 1.G Chassis Owner's Manual

CORVETTE BODY 1B-30

Fig*
66—Front
Body Construction

6. Panel - Front Fender Lower
1.
Panel - Hood

2.
Panel - Cowl Upper F. Front

3.
Panel - Front Fender Upper 7. Bonding Strip

4.
Bonding Strip - Front Fender 8. Panel - Radiator Grille

Upper to Lower

5.
Panel - Front Fender

Lower Rear
Lower

9. Panel - Radiator Grille Upper

- Lower Half
10.
Bonding Strip - Front

Fender Lower Front

to Rear

11.
Bonding Strip - Front Fender

Upper to Radiator Grille

Upper Panel
12.
Reinforcement - Front

Fender

13.
Bonding Strip - Front Fender

Upper Reinforcement

14.
Panel - Radiator Grille Upper -

Upper Half

contour. For deep filling and on vertical surfaces,

several layers may be used, each about 1/2" thick.

4.
Finish the repair by grinding, sanding and painting

in the usual manner, Figure 74.

RESIN KIT

The Resin Repair Kit, for major repairs, contains

resin, hardener, Thixatrope, fiberglass cloth, protecting

creams and mixing utensils. Repairs such as torn panels
and separated joints require the adhesive qualities of the

resin and the reinforcing qualities of the glass fibers.

The following procedure is basic for repairing any

plastic (fiberglass component or panel).

1.
Look for hidden damage. Apply pressure by hand

around the damaged area.

2.
Use paint remover and remove finish from around

damage area. Inspect area again for signs of other

damage.

3.
Grind or file the damaged area to form a "V" at

CHEVROLET CHASSIS SERVICE MANUAL

ENGINE 6-11

Fig.
18 - Cooling System Pressure Test

Carburetor

Refer to Section 6M to perform adjustments such as

idle vent, float level, pump rod and secondary valve.

Fuel Pump

If the owner has complained of poor high speed per-

formance, the fuel pump may be at fault. Too low a

pump pressure or volume will cause a high speed "miss"

because of lack of fuel delievered to the carburetor,

while too high a pressure will cause carburetor flooding.

Check fuel pump as outlined in Section 6M.

Cooling System

The following test may be performed with pressure

testing equipment available commercially for this pur-

pose.
This test provides an excellent means of detecting

internal or external leaks within the cooling system.

1.
Remove radiator cap.

2.
Apply a test pressure of 3 pounds higher than the ra-

diator cap (fig. 18). i.e. 18 pounds for a 15 pound

cap.

3.
If the pressure will not hold, there is either an

internal or external leak in the system.

Cylinder Head Torque and Valve Adjustment

Retorquing the cylinder head bolts is not necessary

unless a gasket has been replaced, or a leak is suspected.

Valve lash must always be adjusted after the head has

been torqued.

Before adjusting the valve lash, it is extremely impor-

tant that the engine be thoroughly warmed up to normal-

ize the expansion of all parts. This is very important

because during the warm-up period, the valve clearances

will change considerably.

Hydraulic

1.
After the engine has been normalized, remove rocker

arm covers and gaskets.

CAUTION: Do not pry rocker arm cover loose.
Gaskets adhering to cylinder head and rocker

arm cover may be sheared by bumping end of

rocker arm cover rearward with palm of hand

or a rubber mallet.

2.
With the engine running at idle, back off valve rocker

arm nut until the valve rocker arm starts to clatter.

3.
Turn rocker arm nut down slowly until the clatter

just stops. This is the zero lash position.

4.
Turn nut down 1/4 additional turn and pause 10 sec-

onds until engine runs smoothly* Repeat additional

1/4 turns, pausing 10 seconds each time, until nut

has been turned down 1 full turn from the zero lash

position.

NOTE: This 1 turn preload adjustment must be

done slowly to allow the lifter to adjust itself to

prevent the possibility of interference, between

the inlet valve head and top of piston, which

might result in internal damage and/or bent push

rods.
Noisy lifters should be replaced.

5.
Repeat Steps 2, 3 and 4 to adjust the rest of the

valves.

6. Clean gasket surfaces on cylinder heads and rocker

arm covers with degreaser then install rocker arm

covers, using new gaskets, and torque bolts to

specifications.

Mechanical

1.
Normalize the engine.

2.
Remove rocker arm covers and gaskets.

CAUTION: Do not pry rocker arm cover loose.

Gaskets adhering to cylinder head and rocker

arm cover may be sheared by bumping end of

rocker arm cover rearward with palm of hand

or a rubber mallet.

3.
Use a socket wrench on self-locking rocker arm stud

nut and adjust as needed to obtain valve lash (see

tune up chart) measured between rocker arm and

valve stem with a leaf type feeler gauge.

4.
Stop engine, clean gasket surfaces on cylinder heads

and rocker arm covers with degreaser then install

rocker arm covers, using new gaskets, and torque

bolts to specifications.

Fig.
19
- Oil Deflector Clips Installed

CHEVROLET CHASSIS SERVICE MANUAL

ENGINE
6-12

ENGINE
MECHANICAL

IN LINE

INDEX

Page

General Description . „ 6-12

Component Replacement and Adjustment 6-12

.Engine Assembly 6-12

Removal 6-12

Installation 6-13

Manifold Assembly 6-14

Removal . 6-14

Installation 6-14

Rocker Arm Cover . 6-14

Removal 6-14

mstallation . . . 6-14

Valve Mechanism
......
1 6-14

Removal 6-14

Installation and Adjustment . 6-14

Valve Lifters
..............
6-15

Locating Noisy Lifters
„.;....
6-15

Removal
.'.*...•
6-15

Installation . 6-15

Valve Stem Oil Seal and/or Valve Spring . 6-16

Replacement . 6-16

Cylinder Head Assembly . 6-16

Removal 6-16

Installation . 6-16

Oil Pan . » 6-17

Removal . . . ; . . 6-17

Installation
.........
. 6-17

Oil Pump . 6-18
Page

Removal . 6-18

Installation . 6-18

Oil Seal (Rear Main) . 6-19

Replacement 6-19

Crankshaft Pulley and Hub 6-19

Removal 6-19

Installation 6-19

Torsional Damper 6-19

Removal 6-19

Installation 6-19

Crankcase Front Cover . 6-20

Removal . 6-20

Installation 6-20

•
Oil Seal (Front Cover) 6-20

Replacement 6-20

Camshaft 6-21

Measuring Lobe Lift . ... .
.-.••.-.
6-21

Removal 6-21

Installation 6-22

Timing Gears
..••••.............••• 6—22

Replacement
6-22

Flywheel
6-22

Removal
* 6-22

Installation
6-22

Engine
Mounts
6-23

Replacement
(Front)
6-23

Replacement
(Rear)
. 6-23

GENERAL DESCRIPTION

The
In
Line engines
(fig. 1L)
covered
in
this section

are
the 1H3 cu. in. L4, the 194,
230
and
250
cu. in. L6,

regardless
of
which passenger vehicle they
are
used
in.

This section covers
the
removal
and
installation
of en-

gine assemblies;
the
removal, installation
and
adjustment

of some sub-assemblies
and
replacement
of
some
com-

ponents.
For
service
to all
components
and
sub-assem-

blies (after removal)
and
removal
of
some sub-assem-

blies,
refer
to
Section
6 of the
Chassis Overhaul Manual.
Because
of the
interchangeability
and
similarity
of

many engine sub-assemblies
and
engine parts, regardless

of which passenger vehicle they
are
used
in,
typical illus-

trations
and
procedures
are
used except where specific

illustrations
or
procedures
are
necessary
to
clarify
the

operation. Although illustrations showing bench opera-

tions
are
used, most single operations, when
not
part
of a

general overhaul, should
be
performed
(if
practical) with

the engine
in the
vehicle.

COMPONENT REPLACEMENT
AND
ADJUSTMENT

ENGINE ASSEMBLY

Removal

1.
Drain cooling system
and
engine
oil.

2.
Remove
air
cleaner
and
disconnect battery cables
at 7.

battery.

3.
Remove hood
as
outlined
in
Section 11.

4.
Remove radiator
and
radiator shroud
as
outlined
in

Section 13.

5.
Remove
fan
blade
and
pulley
as
outlined
in
Section

6K.

6. Disconnect wires
at:

• Starter Solenoid
8.

• Delcotron
9.
Temperature Switch

Oil Pressure Switch

Coil

Disconnect:

Accelerator linkage
at
manifold bellerank.

Exhaust pipe
at
manifold flange.
.

Fuel line (from tank)
at
fuel pump.

Vacuum line
to
power brake unit
at
manifold
(if

so equipped).

• Power steering pump lines
at
pump
end (if so

equipped).

Raise vehicle
and
place
on
jack stands.

Remove propeller shaft.

CHEVROLET CHASSIS SERVICE MANUAL

ENGINE 6-14

b.
Bolt transmission to engine, then raise engine and

transmission assembly and install flywheel to

converter attaching bolts.

c. Install converter
housing*
underpan and starter.

3.
Tilt and lower engine and transmission assembly into

the chassis as a unit, guiding engine to align front

mounts with frame supports.

4.
Install front mount through bolts and torque to

specifications.

5.
Raise engine enough to install rear crossmember,

then install crossmember, install rear mount, lower

engine and torque bolts to specifications.

6. Remove lifting device and lifting adapter then install

rocker arm cover as outlined.

7.
On synchromesh equipped vehicles, install clutch

cross shaft engine bracket, then adjust and connect

clutch as outlined in Section 7.

8. Connect:

• Speedometer cable.

• Shift linkage at transmission.

9; Install propeller shaft.

10.
Remove jack stands and lower vehicle.

11.
Connect:

Power steering pump lines (if disconnected).

Vacuum line to power brake unit (if disconnected).

Fuel line at fuel pump.

Exhaust pipe at manifold flange.

Accelerator linkage at manifold bellcrank.

12.
Connect wires at:

Coil

Oil pressure switch

Temperature switch

Delcotron

Starter solenoid

13.
Install pulley, fan blade and fan belt as outlined in

Section 6K.

14.
Install radiator and shroud as outlined in Section 13.

15.
Install and adjust hood as outlined in Section 11.

16.
Connect battery cables.

17.
Fill with coolant, engine oil and transmission oil,

then start engine and check for leaks.

18.
Perform necessary adjustments and install air

cleaner.

MANIFOLD ASSEMBLY

Removal

1.
Remove air cleaner.

2.
Disconnect both throttle rods at bellcrank and re-

move throttle return spring.

3.
Disconnect fuel and vacuum lines at carburetor.

Disconnect choke cable on \A engines.

4.
Disconnect crankcase ventilation hose at rocker arm

cover.

5.
Disconnect exhaust pipe at manifold flange and dis-

card packing.

6. Remove manifold attaching bolts and clamps then

remove manifold assembly and discard gaskets.

7.
Check for cracks in manifold castings.

8. If necessary to replace either intake or exhaust

manifolds, separate them by removing one bolt and

two nuts at center of assembly. Reassemble mani-

folds using a new gasket. Tighten finger tight and

torque to specifications after assembly to cylinder

head. Transfer all necessary parts.
Installation

1.
Clean gasket surfaces on cylinder head and

manifolds*

2.
Position new gasket over manifold end studs on head

and carefully install the manifold in position making

sure the gaskets are in place.

3.
Install bolts and clamps while holding manifold in

place with hand.

4.
Torque bolts to specifications.

NOTE: On L6 engines center bolt and end bolt

torque differ.

5.
Connect exhaust pipe to manifold using a new

packing.

6. Connect crankcase ventilation hose at rocker arm

cover.

7.
Connect fuel and vacuum lines at carburetor.

8. On L4 engines connect choke cable and adjust as out-

lines in Section 6M.

9. Connect throttle rods at bellcrank and install throttle

return spring.

10.
Install air cleaner, start engine, check for leaks and

adjust carburetor idle speed and mixture.

ROCKER ARM COVER

Removal

1.
Disconnect crankcase ventilation hose(s) at rocker

arm cover.

2.
Remove air cleaner.

3.
Disconnect temperature wire from rocker arm cover

clips.

4.
Remove rocker arm cover. '

CAUTION: Do Not pry rocker arm cover loose

Gaskets adhering to cylinder head and rocker

arm cover may be sheared by bumping end of

rocker arm cover rearward with palm of hand or

a rubber mallet.

Installation

1.
Clean gasket surfaces on cylinder head and rocker

arm cover with degreaser then, using anew gasket,

install rocker arm cover and torque bolts to

specifications.

2.
Connect temperature wire at rocker arm cover clips.

3.
Install air cleaner.

4.
Connect crankcase ventilation hoses.

VALVE MECHANISM

Removal

1.
Remove rocker arm cover as outlined.

2.
Remove rocker arm nuts, rocker arm
balls,
rocker

arms and push rods.

NOTE:
Place rocker arms, rocker arm balls

and push rods in a rack so they may be rein-

stalled in the same location.

Installation and Adjustment

NOTE:
Whenever new rocker arms and/or

rocker arm balls are being installed, coat bear-

ing surfaces of rocker arms and rocker arm

balls with Molykote or its equivalent.

1.
Install push rods,

socket.
Be sure push rods seat in lifter

CHEVROLET CHASSIS SERVICE MANUAL

ENGINE 6-16

5.
Adjust ignition timing and carburetor idle speed and

mixture.

VALVE STEM OIL SEAL AND/OR VALVE SPRING

Replacement

1.
Remove rocker arm cover as outlined.

2.
Remove spark plug, rocker arm and push rod on the

cylinder(s) to be serviced.

3.
Apply compressed air to the spark plug hole to hold

the valves in place.

NOTE: A tool to apply air to the cylinder is

available through local jobbers or may be manu-

factured. In manufacturing this Tool a AC-46N

Spark Plug or its equivalent is recommended.

This will make the Tool universal for all

Chevrolet engines. Chisel the spark plug as

shown, then drive the porcelain out of the plug

by tapping the center electrode against a hard

block. Using a 3/8" pipe tap, cut threads in the

remaining portion of the spark ^>lug and assem-

ble as shown (fig. 3L).

4.
Using Tool J-5892 to compress the valve spring, re-

move the valve locks, valve cap, valve shield and

valve spring and damper (fig. 4L).

5.
Remove the valve stem oil seal.

6. To replace, set the valve spring and damper, valve

shield and valve cap in place. The close coiled end

of the spring is installed against the cylinder head.

Compress the spring with
Too^
J-5892 and install oil

seal in the lower groove of the stem, making sure the

seal'is flat and not twisted.

NOTE: A light coat of oil on the seal will help

prevent twisting.

7.
Install the valve locks and release the compressor

tool, making sure the locks seat properly in the

upper groove of the valve stem.

NOTE: Grease may be used to hold the locks

in place while releasing the compressor tool.

8. Install spark plug, using a new gasket, and torque to

specifications.

9. Install and adjust valve mechanism as outlined.

CYLINDER HEAD ASSEMBLY

Removal

1.
Remove manifold assembly as. outlined.

2.
Remove valve mechanism as outlined.

3.
Drain cooling system (block).

4.
Remove fuel and vacuum line from retaining clip at

water outlet then disconnect wires from temperature

sending units.

5.
Disconnect upper radiator hose at water outlet hous-

ing and battery ground strap at cylinder head.

6. Remove coil (L6 engines only).

7.
Remove cylinder head bolts, cylinder head and gas-

ket. Place cylinder head on two blocks of wood to

prevent damage.

Installation

CAUTION: The gasket surfaces on both the

head and the block must be clean of any foreign
matter and free of nicks or heavy scratches.

Cylinder bolt threads in the block and threads

on the cylinder head bolt must be cleaned. (Dirt

will affect bolt torque.) Do not use gasket sealer

on composition steel asbestos gasket.

Fig. 3L -
AIF
Adapter Tool

1.
Place the gasket in position over the dowel pins with

the bead up.

2.
Carefully guide cylinder head into place over dowel

pins and gasket.

3.
Coat threads of cylinder head bolts with sealing com-

pound and install finger tight.

4.
Tighten cylinder head bolts a little at a time in the

sequence shown on the torque sequence chart until

the specified torque is reached.

5.
Install coil (if removed).

6. Connect upper radiator hose and engine ground strap.

7.
Connect temperature sending unit wires and install

fuel and vacuum lines in clip at water outlet.

8. Fill cooling system.
•

9. Install manifold assembly as outlined.

10.
Install and adjust valve mechanism as outlined.

Fig.
4L
- Compressing Valve Spring

CHEVROLET CHASSIS SERVICE MANUAL

ENGINE 6-17

Fig.
5L
-
Engine Blocked for Pan Removal

NOTE: Do not install rocker arm cover.

11.
Start engine and allow warm up then retorque cylin-

der head
as
outlined in Step 4 and readjust valves as

outlined under Engine Tune Up.

OIL PAN

Removal

Chevrolet
and Camaro

1.
Disconnect battery positive cable.

2.
Remove through bolts from engine front mounts.

3.
Drain radiator, then disconnect upper and lower ra-

diator hoses at radiator.

4.
Remove fan blade as outlined in Section 6K.

5.
Raise vehicle then drain engine oil.

6. Disconnect and remove* starter.

7.
On
vehicles equipped with automatic transmission,

disconnect transmission cooler lines at transmission

and remove converter housing underpan.

8. Disconnect steering
rod at
idler lever then swing

steering linkage for oil pan clearance.

9. Rotate crankshaft until timing mark
on
torsional

damper is at 6:00 o'clock position.

10.
Using
a
suitable jack (and a block of wood to prevent

damaging oil pan), raise engine enough to insert 2"
x

4"
wood blocks under engine mounts (fig. 5L), then

lower engine onto blocks.

NOTE:
If
2"
x
4" wood blocks are cut 5-1/2"

long they can be used on all Chevrolet engines.

The 5-1/2" length up for in line engines and the

4"
side up for V8 engines.

11.
Remove oil pan and discard gaskets and seals.

Cfievel/e

1.
Remove enginfe from vehicle as outlined.

2.
Place engine on jack stands, one at each front mount

and one at transmission extension.

CAUTION: Leave engine lift attached
to
en-

gine.
Do not remove all weight
of
engine from

engine lift.

3.
On
vehicles equipped with automatic transmissions

remove converter housing underpan.

4.
Remove starter.

5.
Remove oil pan and discard gaskets and seals.
Chevy//

1.
Disconnect battery positive cable.

2.
Drain engine oil.

3.
Disconnect then remove starter.

4.
Disconnect-steering idler arm bracket at right hand

frame rail and swing steering linkage down for pan

clearance.

5.
On L6 engines, remove front crossmember.

NOTE:
On
station wagon
let
stabilizer
bar

hang while removing crossmember.
"

6. Remove oil pan and discard gaskets and seals.

Installation

1.
Thoroughly clean all gasket sealing surfaces.

NOTE: Use
a
new pan gasket set.

2.
Install rear seal in rear main bearing cap.

3.
Install front Seal on crankcase front cover pressing

tips into holes provided in cover.

4.
Install side gaskets on cylinder block (fig. 6L).

5.
Complete installation as follows:

Life

1
i

If ^
jfp^;.^3p
>\~^^ \s3^^r' -'••'•'-^^Hll

|^=-5p|:*iil^
mm

Fig.
6L
-
Pan Gaskets and Seals

CHEVROLET CHASSIS SERVICE MANUAL

ENGINE 6-18

NOTE:
Bolts into crankcase cover should be

installed last. They are installed at an angle

and holes line up after rest of pan bolts are

snugged up.

Chevrolet and Camaro

a. If crankshaft was rotated while pan was off, place

timing mark at 6:00 o'clock position.

b.
Install oil pan and torque bolts to specifications.

c. Using a suitable jack (and a block of wood to prevent

damaging oil pan) raise engine enough to remove 2" x

4"
wood blocks, then lower engine.

d. On vehicles equipped with automatic transmission

install converter housing underpan, then connect

transmission cooler lines.

e. Install and connect starter.

f. Lower vehicle and install fan blades as outlined in

Section 6K.

g. Connect upper and lower radiator hoses.

h. Install through bolts in engine front mounts.

i. Connect battery positive cable.

j.
Fill radiator with coolant and fill engine with oil,

then start engine and check for leaks.

Chevelie

* a. Install oil pan and torque bolts to specifications.

b.
On vehicles equipped with automatic transmission,

install converter housing underpan.

c. Install starter.

d. Install engine as outlined.

Chevy II

a. Install oil pan and torque bolts to specifications.

Fig.
7L- Removing Oil Sea! (Lower Half)
Fig.
8L - Removing Oil Seal (Upper Half)

b.
On L6 engines, install front crossmember.

c. Connect steering idler arm.

d. Install starter and connect wires.

e. Connect battery cable, fill with oil, start engine and

check for leaks.

OIL PUMP

Removal

1.
Remove oil pan as outlined.

2.
Remove two flange mounting bolts, pickup pipe bolt,

then remove pump and screen as an assembly.

Installation

1.
Align oil pump drive shafts to match with distributor

tang, then install oil pump to block positioning flange

over distributor lower bushing. Use no gasket.

NOTE:
Oil pump should slide easily into place,

if not, remove and reposition slot to align with

distributor tang.

2.
Install oil pan using new gaskets and seals as

outlined.

CHEVROLET CHASSIS SERVICE MANUAL

ENGINE 6-19

OIL SEAL (REAR MAIN)

Replacement

The rear main bearing oil seal can be replaced (both

halves) without removal of the crankshaft.

NOTE:
Always replace the upper and lower

seal as a unit. Install with the lip facing toward

the front of the engine.

1.
With the oil pan removed, remove the rear main

bearing cap.

2.
Remove oil seal from the groove by lifting the end

tab (fig. 7L) then clean seal groove.

3.
Lubricate the lip and O.D. of a new seal with engine

oil. Keep oil off the parting line surface. Insert

seal in cap and roll it into place with finger and

thumb,
using light pressure so beads on seal O.D.

are not cut by seal groove at cap parting line. Be

sure tabs on seal are properly located in cross

grooves.

4.
To remove the upper half of the seal, use a small

hammer to tap a brass pin punch on one end of seal

until it protrudes far enough to be removed with

pliers (fig. 8L).

NOTE:
Always clean crankshaft surface re-

moving all foreign deposits before installing a

new seal. Also clean seal groove.

5. Lubricate the lip and O.D. of a new seal with engine

oil. Keep oil off the parting line surface. Gradually

push with a hammer handle, while turning crank-

shaft, until seal is rolled into place. (Similar to in-

stalling a main bearing.) Be careful that seal bead

on O.D. is not cut. Compress seal towards crank-

shaft as much as possible.

6. Install the rear main bearing cap (with new seal) and

torque to specifications. Be sure cross seal tabs

are in place and properly seated.

CRANKSHAFT PULLEY AND HUB

(Chevy II with L4 Engine)

Removal

1.
Drain radiator and disconnect upper and lower radi-

ator hoses at radiator.

2.
Remove radiator core as outlined in Section 13.

3.
Remove fan belt. Remove crankshaft pulley from

pulley hub.

4.
Install puller Tool J-6978 to pulley hub with two

3/8"
x 2" and one 5/16" x 2" bolts and remove hub

then remove puller tool.

Installation

1.
Coat oil seal contact area on hub with engine oil

position hub over crankshaft and key and start hub

into position with a mallet. Using Tool J-5590 drive

onto crankshaft until it bottoms against crankshaft

gear.

NOTE:
Crankshaft extends slightly through hub

and a tool is necessary to drive hub completely

into bottomed position.

2.
Install pulley onto hub.

NOTE:
There are two 3/8" holes and one

5/16" hole that must be matched on hub in order
Fig.
9L - Removing Torsional Damper

to properly position timing mark.

3.
Install fan belt and adjust using strand tension gauge.

4.
Install radiator as outlined in Section 13.

TORSIONAL DAMPER

Removal

1.
Remove radiator core, as outlined in Section 13.

2.
Remove fan belt and (if so equipped) accessory drive

pulley and belt.

3.
Install Tool J-6978 to damper and turn puller screw

to remove damper (fig. 9L). Remove tool.

Installation

1.
Coat front cover oil seal contact area of damper with

engine oil.

CAUTION: It is necessary to use installer

Tool J-22197 to prevent the inertia weight sec-

Fig.
10L - Installing Torsional Damper

CHEVROLET CHASSIS SERVICE MANUAL

ENGINE 6-20

Fig.
11 L
- J-21742 Centering Tool in Cover

tion from walking off the hub during installation

of damper.

2.

3.
Attach damper installer Tool J-22197 to damper.

Tighten fingers of tool to prevent weight from moving

(fig. 10L).

Position damper on crankshaft and drive into posi-

tion, using J-5590, until it bottoms against crankshaft

gear (fig. 10L). Remove installer tool.

4.
Install fan belt and adjust using strand tension gauge.

5.
If so equipped, install accessory drive pulley and

belt.

6. Install radiator core as outlined in Section 13.

7.
Fill cooling system and check for leaks.

CRANKCASE FRONT COVER

Fig.
121
- Installing Oil Seal (Cover Removed)
Fig. 13L- Installing Oil Seal (Cover installed)

Removal

1.
Remove oil pan as outlined.

2.
Remove crankshaft pulley and hub or torsional

damper as outlined.

3.
Remove crankcase front coyer attaching bolts, re-

move cover and gasket.

Installation

1.
Clean gasket surfaces on block and crankcase front

cover.

2.
Install centering Tool J-996 or Tool J-21742 in

crankcase front cover seal (fig. 11L).

3.
Coat the gasket with gasket sealer and place in posi-

tion on cover, then install crankcase front cover to

block and torque bolts to specifications.

4.
Remove centering tool.

NOTE: It is important that centering tool be

used to align crankcase front cover so that

crankshaft hub or torsional damper installation

will not damage seal and to position seal evenly

around the balancer or hub surface.

5.
Install crankshaft hub and/or torsional damper as

outlined.

6. Install oil pan with new gaskets and seals as outlined.

OIL SEAL (FRONT COVER)

Replacement

With Cover Removal

1.
With cover removed, pry old seal out of cover from

the front with screw driver being careful not to

distort cover.

2.
Install new seal so that open end of the seal is toward

the inside of cover and drive it into position with

ToolJ-995 (fig. 12L).

CHEVROLET CHASSIS SERVICE MANUAL

ENGINE 6-21

CAUTION: Support cover
•
at sealing area.

(Tool J-971 may be used as support.)

Without Cover
Removal

1.
With crankshaft pulley and nub or torsional damper

removed, pry old seal out of cover from the front

with a large screw driver, being careful not to dam-

age the seal surface on the cover.

2.
Install new seal so that open end of seal is toward the

inside of cover and drive it into position with Tool

J-8340 (fig. 13L).

CAMSHAFT

Measuring Lobe Lift

NOTE: Procedure is similar to that used for

checking valve timing.. If improper valve

operation is indicated, measure the lift of each

push rod in consecutive order and record the

readings.

1.
Remove valve mechanism as outlined.

2.
Position indicator with ball socket adapter on push

rod (fig. 14L).

3.
Rotate the crankshaft slowly in the direction of rota-

tion until the lifter is on the heel of the cam lobe.

At this point, the push rod will be in its lowest

position.

4.
Set dial indicator on zero, then rotate the crankshaft

slowly, or attach an auxiliary starter switch and

"bump" the engine over, until the push rod is in the

fully raised position.

CAUTION: The primary distributor lead must

be disconnected from the negative post on the

coil and the ignition switch must be in the ON

position. Failure to do this will result in a

damaged grounding circuit in the ignition switch.
Fig.
15L - Timing Gear Marks

5.
Compare the total lift recorded from the dial indica-

tor with specifications.

6. Continue to rotate the crankshaft until the indicator

reads zero. This will be a check on the accuracy of

the original indicator reading.

7.
If camshaft readings for all lobes are within specifi-

cations, remove dial indicator assembly.

8. Install and adjust valve mechanism as outlined.

Removal

1.
Remove valve lifters as outlined,

2.
Remove crankcase front cover as outlined.

3.
Remove radiator as outlined in Section 13.

4.
Remove grille as outlined in Section 13.

5.
Remove fuel pump as outlined in Section 6M.

6. Align timing gear marks then remove the two cam-

shaft thrust plate bolts by working through holes in

Fig.
ML - Measuring Camshaft Lobe Lift
Fig.
16L - Checking Camshaft Gear Runout

CHEVROLET CHASSIS SERVICE MANUAL