1967 CHEVROLET CAMARO engine

ENGINE 6-28

damper comes near the "0" mark on the front

cover.
11
the valves are not moving, the engine is

in the number 1 firing position. If the valves

move as the mark comes up to the timing tab, the

.
engine is in number 6 firing position and crank-

shaft should be rotated one more revolution to

reach the number 1 position,

b.
Valve adjustment is made by backing off the ad-

justing nut (rocker arm stud nut) until there is

play in the push rod and then tighten nut to just

remove all push rod to rocker arm clearance.

' this may be determined by rotating push rod with

fingers as the nut is tightened (fig. 4
V).
When

push rod does not readily move in relation to the

rocker arm, the clearance has been eliminated.

The adjusting nut should then be tightened an

additional 1 turn to place the hydraulic lifter

plunger in the center of its travel. No other

adjustment is required.

c. With the engine in the number 1 firing position

as determined above, the following valves may be

adjusted.

Exhaust - 1, 3, 4, 8

Intake - 1, 2, 5, 7

d. Crank the engine one revolution until the pointer

"(X" mark and torsional damper mark are again

in alignment. This is number 6 firing position.

With the engine in this position the following

valve may be adjusted.

Fig.
5V - Valve Adjustment (Mechanical)
Exhaust - 2, 5, 6, 7

Intake
-•
3, 4, 6, 8

With Mechanical Valve
Lifters

a. Crank engine until mark on torsional damper

lines up with center or "0" mark on the timing

tab and the engine is in the number 1 firing posi-

tion. This may be determined by placing fingers

on t£e number 1 cylinder valve as the mark on the

damper comes near the n0" mark on the front

cover. If the valves are not moving, the engine

is in the number 1 firing position. If the valves

move as the mark comes up to the timing tab, the

engine is in number 6 firing position and crank-

shaft should be rotated one more revolution to

reach the number 1 position.

b.
With the engine in the number 1 firing position as

determined above, adjust the following valves to

specifications with a feeler gauge (fig. 5V).

Exhaust - 4, 8

Intake - 2, 7. .

c. Turn crankshaft 1/2 revolution (180°) clockwise

and adjust the following valve to specifications

with a feeler gauge.

Exhaust -3,6

Intake - 1, 8

d. Turn crankshaft 1/2 revolution (180°) clockwise

until the pointer "0" mark and torsional-damper

mark are again in alignment. This is number 6

firing position. With the engine in this position,

adjust the following valves to specifications with

a feeler gauge.

Exhaust -5,7

Intake - 3, 4

e. Turn crankshaft 1/2 revolution (180°) clockwise

and adjust the following valves to specifications

with a feeler gauge.

Exhaust - 1, 2

Intake - 5, 6

f. Readjust valves (hot and running) as outlined

under "Engine Tune Up".

4.
Install rocker arm covers as outlined.

5.
Adjust carburetor idle speed and mixture.

VALVE LIFTERS

Hydraulic valve lifters very seldom require attention;

The lifters are extremely simple in design, readjust-

ments are not necessary, and servicing of the lifters re-

quires only that care and cleanliness be exercised in the

handling of parts.

Locating Noisy Lifters (Hydraulic)

Locate a noisy valve lifter by using a piece of garden

hose approximately four feet in length. Place one end of

the hose near the end of each intake and exhaust valve

with the other end of the hose to the ear. In this manner,

the sound is localized making it easy to determine which

lifter is at fault.

Another method is to place a finger on the face of the

valve spring retainer. If the lifter is not functioning

properly, a distinct shock will be felt when the valve re-

turns to its seat.-*

The general types of valve lifter noise are as follows:

1.
Hard Rapping Noise—Usually caused by the plunger

becoming tight in the bore of the lifter body to such

CHEVROLET CHASSIS SERVICE MANUAL

ENGINE 6-29

an extent that the return spring can no longer push

the plunger back up to working position. Probable

causes are:

a. Excessive varnish or carbon deposit causing ab-

normal stickiness.

b.
(Sailing or "pick-up" between plunger and bore of

lifter body, usually caused by an abrasive piece of

dirt or metal wedging between plunger and lifter

body.

2.
Moderate Rapping Noise--Probable causes are:

a. Excessively high leakdown rate.

b.
Leaky check valve seat.

c. Improper adjustment.

3.
General Noise Throughout the Valve Train-rThis

will, in almost all cases, be a definite indication of

insufficient oil supply, or improper adjustment.

4.
Intermittent Clicking—Probable causes are:

a. A microscopic piece of dirt momentarily caught

between ball seat and check valve ball.

b.
In rare cases, the ball itself may be out-of-round

or have a flat spot.

c. Improper adjustment.

In most cases where noise exists in one or more lifters

all lifter units should be removed, disassembled, cleaned

in a solvent, reassembled, and reinstalled in the engine.

If dirt, corrosion, carbon, etc. is shown to exist in one

unit, it more than likely exists in all the units, thus it

would only be a matter of time before all lifters caused

trouble.

Removal

1.
Remove intake manifold as outlined.

2.
Remove valve mechanism as outlined.

3.
Remove valve lifters.

NOTE: Place valve lifters in a rack so they

may be reinstalled in the same location.

Installation

1.
Install valve lifters.

NOTE: Whenever new valve lifters are being

installed coat foot of valve lifters with Molykote

or its equivalent.

2.
Install intake manifold as outlined.

3.
Install and adjust valve mechanism as outlined.

VALVE STEM OIL SEAL AND/OR VALVE SPRING

Replacement

1.
Remove rocker arm cover(s) as outlined.

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

cylinders to be serviced.

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

tl*e 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 plug and assem-

ble as shown (fig. 6V).
Fig.
6V - Air Adapter Tool

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

move the valve locks, valve cap, and valve spring and

damper (fig. 7V).

5.
Remove valve stem oil seal.

6. Remove as follows:

283, 327 and 350 eu. in.
Engines

a. 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.

b.
Compress the spring with Tool 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.

Fig.
7V - Compressing Valve Spring

CHEVROLET CHASSIS SERVICE MANUAL

ENGINE 6-30

c". Install the valve locks and release the compres-

sor 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.

396 and 427
cu.
in.
Engines

a. Install new valve stem oil seal (coated with oil)

in position over valve guide.

b.
Set the valve spring and damper and valve cap in

place.

c. Compress the spring with Tool J-5892 and install

the valve locks, then release the compressor tool,

making sure the locks seat properly in the groove

of the valve stem.

NOTE: Grease may be used to hold the locks

in place while releasing the compressor tool.

7.
Install spark ,plug, using a new gasket, and torque to

specifications. -

8. Install and adjust valve mechanism as outlined.

CYLINDER HEAD ASSEMBLY

Removal

1.
Remove intake manifold as outlined.

2.
Remove exhaust manifolds as outlined.

3.
Remove valve mechanism as outlined.

4.
Drain cooling system (block).

5.
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

ttter and free of nicks or heavy scratches.

Under bolt threads in the block and threads on

Pie cylinder head bolt must be cleaned. (Dirt

will affect bolt torqueT)

1.
On engines using a STEEL gasket, coat both sides of

a new gasket with a good sealer, spread the sealer

thin and even. One method of applying the sealer that

will assure the proper- coat is with the use of a paint

roller. Too much sealer may hold the beads of the

gasket away from the head or block.

CAUTION: Use no sealer on engines using a

composition STEEL ASBESTOS gasket.

2.
Place the gasket in position over the dowel pins with

the bead up.

3.
Carefully guide cylinder head into place over dowel

pins and gasket.

4.
Coat threads of cylinder head bolts with sealing

compound and install finger tight.

5.
Tighten cylinder head bolts a little at a time in the

sequence shown on the torque sequence chart until

the specified torque is reached.

6. Install the exhaust manifold as outlined.

7.
Install the intake manifold as outlined.

8. Install and adjust the valve mechanism as outlined.
OIL
PAN

Removal

Chevrolet
and Camaro

1.
Disconnect battery positive cable.

2.
Disconnect distributor cap from distributor (to pr-e-

vent breaking distributor cap when engine is raised).

3.
Drain radiator, then disconnect lower radiator hose

at water pump and remove oil dip stick and tube

(where necessary). '

4.
Remove fan blade.

5.
Raise vehicle then drain engine oil;

6. Remove through bolts from engine front mounts.

Disconnect and remove starter.

7.
On vehicles equipped with automatic transmissions,

remove converter housing underpan.

8. Disconnect steering rod at idler lever then swing

steering linkage 4pwn for oil pan clearance.

9. Rotate crankshaft untii 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. 8V), 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.

NOTE: -On the 396 and 427 cu. in. engine, the

oil pan has three 1/4" x 20 attaching bolts at ,

crankcase front cover. One located at each

corner and one at lower center.

Chevelle

1.
Remove engine from vehicle as outlined.

2.
Lower engine onto jack stands, one at each front

Tnaount and one at transmission extension.

CAUTION: Leave engine lift attached to en-

gine.
Do not remove all weight of engine off

engine lifET

3.
Remove starter.

4.
On vehicles equipped with automatic transmission

remove converter housing underpan.

5.
Remove oil pan and discard gaskets and seals.

Fig.
8V - Engine Blocked for Pan Removal

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

ENGINE 6-32

Fig.
1GV - Removing Oil Seal (Lower Half)

bearing cap, aligning slot on top end of extension

shaft with drive tang on lower end of distributor

drive shaft.

2.
Install pump to rear bearing cap bolt and torque to

specifications.

NOTE:
Installed position of oil pump, screen

is with bottom edge parallel to oil pan rails.

3.
Install oil pan as outlined.

OIL SEAL (REAR MAIN)

Replacement

The rear main bearing oil seal can be replaced (both

halves) without removal of the crankshaft.
Fig.
12V - Removing Torstonal Damper

NOTE:
Always replace the upper and lower

seal as a unit.. Install with the lip facing toward

the front of the engine.

With the oil pan and oil pump removed, remove the

rear main bearing cap.

Remove oil seal from the groove by prying from the

bottom with a small screw driver (fig. 10V).

Lubricate the lip of a new seal with engine oil. Keep

oil off the parting line surface as this is treated with

glue. Insert seal in cap and roll it into place with

finger and thumb, using light pressure so seal tangs

at parting line do not cut bead on back of seal.

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. 11V).

NOTE:
Always wipe crankshaft surface clean

before installing a new seal.
1.

2.

3.

5.

Fig.
1IV - Removing Oil Seal (Upper Half)
Lubricate the lip of a new seal with engine oil. Keep

oil off the parting line surface as this is treated with

glue. Gradually push with a. hammer handle, while

turning crankshaft, until seal is rolled into place.

(Similar to installing a main bearing.) Be careful

that seal tangs at parting line do not cut bead on back

of seal.

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

torque to specifications.

TORSIONAL DAMPER

Removal

1.
Remove fan belt, fan and pulley as outlined in Sec-

tion 6K.

2.
Remove the radiator and shroud as outlined in Sec-

tion 13.

NOTE:
If additional operations such as cam-

shaft removal are not being performed, the radi-

ator will not have to be removed
.on
Chevrolets

and Corvettes equipped with 396 and 427 cu. in.

engines.

. 3. On Corvettes equipped with 427 cu. in. engines, re-

move engine front mount through-bolts and raise

front of engine enough for torsional damper to clear

frame crossmember.

CHEVROLET CHASSIS SERVICE MANUAL

ENGINE 6-33

Fig.
13V - Installing TorsionaI Damper (283, 327 and 350)

4.
Remove accessory drive pulley, then remove tor-

sional damper retaining bolt (if so equipped).

5. Install Tool J-6978 to torsional damper and turn

puller screw to remove damper from crankshaft

(fig. 12V).

6. Remove tool.

Installation

CAUTION: It is necessary to use installer tool

to prevent the inertia weight section from walk-

ing off the hub during installation of damper.

283, 327 and 350 cu. in. Engines

(Except 327-325 HP & 350 HP)

1.
Coat front cover seal contact area (on torsional

damper) with engine oil.

Fig.
14V - Installing Torsional Damper (396 and 427)
2.
Attach damper installer Tool J-22197 to damper.

Tighten fingers of tool to prevent weight from moving

(fig. 13V).

3.
Position damper on crankshaft and drive into position

until it bottoms against crankshaft sprocket (fig.

13V).
Remove installer tool.

4.
Install accessory drive pulley.

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

6. Install fan pulley and fan as outlined in Section 6K.

7. Install fan belt and adjust to specifications using

strand tension gauge.

8. Fill cooling system, start engine and check for leaks.

396 and 427
cu.
in.
Engines

1.
Coat front cover seal contact area (on damper) with

engine oil.

2.
Place damper in position over key on crankshaft.

3.
Using Tool J-21058 pull damper onto crankshaft

(fig. 14V).

NOTE:
If engine or radiator has not been re-

moved from the vehicle a 1/2"- 20 x 5" bolt and

a
1/2"-20
nut may be used in place of the bolt

and nut of Tool J-21058.

CAUTION: Install bolt in crankshaft with suffi-

cient thread engagement (min. 1/2").

4.
Remove tool from crankshaft.

5. Install damper retaining bolt and torque to specifica-

tions,
then install accessory drive pulley.

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

7. Install fan pulley and fan as outlined in Section 6K.

8. Install fan belt and adjust to specifications using

strand tension gauge.

9. On Corvettes, lower engine and install front mount

through-bolts.

10.
Fill cooling system, start engine and check for leaks.

327
cu.
in. (325 & 350 HP)
Engine

Install damper as outlined for 396 and 427 cu. in. en-

gines,
using a 7/16"-20 x 5" bolt and nut in place of the

bolt and nut furnished with J-21058.

CRANKCASE FRONT COVER

Removal

1.
Remove oil pan as outlined.

2.
Remove torsional damper as outlined.

3.
Remove water pump as outlined in Section 6K.

4.
Remove crankcase front cover attaching bolts and

remove front cover and gasket, then discard gasket

Installation

283, 327 and 350 cu. in.
Engine

1.
Make certain that cover mounting face and cylinder

block front face are clean and flat.

2.
Coat the oil seal with engine oil and using a new

cover gasket, coated with gasket sealer, install cover

and gasket over dowel pins and cylinder block.

3.
Install cover screws and torque bolts to

specifications.

4.
Install water pump as outlined in Section 6K.

5. Install torsional damper as outlined.

6. Install oil pan as outlined.

CHEVROLET CHASSIS SOVKZ MANUAL

ENGINE 6-34

Fig.
15V - Centering Tool in Cover (396 and 427)

396 and 427
cu.
in.
Engine

1.
Make certain that cover mounting face and cylinder

block front face are clean and flat.

2.
Coat the oil seal with engine oil and install Aligning

Tool J-22102 in oil seal (fig. 15V) then using a new

cover gasket coated with gasket sealer, install cover

and gasket on cylinder block.

3.
Install cover screws and torque bolts to specifica-

tions,
then remove Aligning Tool J-22102.

4.
Install water pump as outlined in Section 6K.

5. Install torsional damper as outlined.

6. Install oil pan as outlined.
Fig.
17V - Installing Oil Seal (Cover Removed)

396 and 427

OIL SEAL (FRONT COVER)

Replacement

With Cover
Removal

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

the front with a large screw driver.

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

the inside of cover and drive it into position with

Tool J-995 on 283, 327 and 350 cu. in. engines

(fig. 16V) or Tool J-22102 on 396 and 427 cu. in.

engines (fig. 17V).

CAUTION: Support cover at sealing area to

avoid distorting cover.

Without Cover
Removal

1.
With torsional damper removed, pry old seal out of

cover from the front with a large screw driver, being

careful not to damage the surface on the crankshaft.

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 on 283, 327 and 350 cu. in. engines (fig. 18V)

or Tool J-22102 on 396 and 427 cu. in. engines

(fig. 19V),

Fig.
16V - Installing Oil Seal (Cover Removed)

283,
327 and 350
Fig.
18V- Installing Oil Sea! (Cover Installed)

283,
327 and 350

CHEVROLET CHASSIS SERVICE MANUAL

ENGINE 6-35

Fig.
19V - installing Oil Seal (Cover Installed)

396 and 427

TIMING CHAIN AND/OR SPROCKETS

Replacement

1.
Remove torsionai damper and crankcase front cover

as outlined.

2.
Crank engine until marks on camshaft and crankshaft

sprockets are in alignment (fig. 20V).

3.
Remove three camshaft sprocket to camshaft boltg.

4.
Remove camshaft sprocket and timing chain together.
Fig.
21V - Removing Crankshaft Sprocket

(283,
327 and 350)

NOTE: Sprocket is a light press fit on cam-

shaft. To dislodge, tap lightly on lower edge of

camshaft sprocket with a plastic hammer.

5.
If crankshaft sprocket is to be replaced, remove

sprocket using Tool J-5825 on 283, 327 and 350

cu. in. engines (fig. 21V) or Tool J-1619 on 396 and

427 cu. in. engines (fig. 22V). Install new sprocket

using Tool J-5590 on 283, 327 and 350 cu. in. engines

- (fig. 23V) or Tool J-21058 on 396 and 427 cu. in.

engines (fig. 24V).

6. Install timing chain on camshaft sprocket. Hold the

sprocket vertical with the chain hanging below, and

orient to align marks on camshaft and crankshaft

sprockets (fig. 20V).

7.
Align dowel in camshaft with dowel hole in camshaft

sprocket and install sprocket on camshaft (fig. 25V).

NOTE: Do not attempt to drive cam sprocket

on shaft as welsh plug at rear of engine can be

dislodged.

WASHER

(TORSIONAL DAMPER)

Fig.
20V - Timing Sprocket Marks
Fig.
22V - Removing Crankshaft Sprocket (396 and 427)

CHEVROLET CHASSIS SERVICE MANUAL