x
Replacement Interval Guide
The OEM recommends check and replace if
necessary after 60,000 miles, then every
15,000 miles.
The previous use and service history of the vehicle
must always be taken into account.
Check For Engine Damage
CAUTION: This engine has been identified as a
FREEWHEELING engine in which the possibility of
valve-to-piston damage in the event of a timing belt
failure may be minimal or very unlikely. However, a
precautionary compression check of all cylinders
should be performed.
A compression check of all cylinders should be
performed before removing the cylinder head.
Labor Times
–
hrs
Remove & install:
Cutlass Supreme
4.20
Grand Prix
3.90
Lumina/Monte Carlo
4.90
Special Tools
º
2 x camshaft timing clamps
–
No. J38613-A.
Special Precautions
º
Disconnect battery ground cable.
º
Do NOT turn crankshaft or camshaft with timing
belt removed.
º
Remove spark plugs to ease turning engine.
º
Turn crankshaft in normal direction of rotation
(unless otherwise stated).
º
Do NOT turn crankshaft via camshaft or other
sprockets.
º
Observe all tightening torques.
Removal
1.
Remove:
¡
Air cleaner and duct.
¡
Coolant reservoir, move to one side.
¡
Accessory drive belt.
2.
Siphon fluid from PAS reservoir.
3.
Disconnect PAS hoses, cap hose ends and pump
fittings to prevent fluid leakage.
4.
Remove:
¡
PAS pump from bracket.
¡
Timing belt right hand cover
j
1
.
¡
Spark plug wire cover.
¡
Timing belt left hand cover
j
2
.
¡
ECM harness cover.
¡
Accessory drive belt tensioner.
¡
PAS hose from clip on alternator.
¡
Timing belt center cover
j
3
.
¡
Right hand & left hand camshaft covers.
5.
Remove the tensioner side plate
j
8
.
6.
Turn the tensioner plunger unit and remove from
the pulley arm socket and mounting.
NOTE: DO NOT lose the tapered bush located
between the plunger and the mounting.
7.
Undo tensioner pulley bolt
j
9
and remove the
tensioner pulley and arm.
NOTE: Pulley pivot bush can fall out, use a flat
magnet or tape to hold in place.
Timing marks
j
5
,
j
6
&
j
7
are shown with timing
belt installed. These marks may NOT be visible.
8.
Remove the timing belt.
NOTE: Check the tensioner length from the
center line of the trunnion to end of the rubber
boot
j
10
. If the length is between 3.2-3.7 ins., the
timing belt can be re-used. If the length is more
than 3.7 ins., a new timing belt must be fitted.
IMPORTANT: For maximum timing belt system
life, replace all tensioners and pulleys during
timing belt replacement.
Installation
1.
Before installing the tensioner plunger unit, retract
the pushrod using the following procedure:
¡
Bend suitable wire, such as a paper-clip, of
0.032 ins. diameter, into peg 1.85 ins. long
j
11
.
¡
Lightly clamp plunger between vise jaws at
s
and leave for five minutes, to allow oil to drain
down toward rubber boot.
¡
Remove plug
j
12
from base of plunger.
¡
Insert small screwdriver through hole in plunger
base and turn clockwise until pushrod is fully
retracted.
¡
Push wire peg
j
11
into vent hole
j
13
and turn
screwdriver counterclockwise until wire peg
locks into pushrod.
¡
Top up the plunger unit with SAE 5W30
synthetic engine oil to bottom of hole.
DO NOT overfill.
¡
Install the plug
j
12
into the plunger, take care it is
fully inserted and sealing the plunger casing.
¡
Clean off any oil spilt on plunger unit.
2.
Clean tensioner pulley and arm and wipe dry,
DO NOT lubricate.
3.
Turn crankshaft in direction of rotation until
No.1 cylinder at TDC of compression stroke with
pulley timing marks
j
4
aligned.
4.
Turn all camshafts so that machined flats are facing
UP.
5.
Install a camshaft timing clamp No. J38613-A
j
14
onto each camshaft carrier and torque bolts
j
15
to
22 ft. lbs.
NOTE: Remove oil from bolt holes to prevent
threads from stripping.
6.
Erase timing marks
j
6
&
j
7
from camshaft
sprockets.
7.
Loosen camshaft sprocket bolts and gently tap
each sprocket with soft faced hammer to release
sprocket from taper.
8.
Tighten camshaft sprocket bolts finger tight, ensure
sprockets turn freely without freeplay.
ENG
AD18333
CA1
CA2
CA3
CA4
G1
G2
INT
T
AD83646
AD83650
AD83655
AD83651
AD83651
AD83658
AD83657
AD83656
13
12
11
7
8
9
5
4
3
2
1
10
1.85 ins
AD85075
15
14
(18 ft. lbs.)
(37 ft. lbs.)
(22 ft. lbs.)
6
TBK273P
DISCLAIMER OF WARRANTIES: Although this information has been obtained from sources generally thought to be reliable, no warranty (expressed or implied) can be made as to its accuracy or completeness, nor is any responsibility assumed by Autodata Publications Inc. or anyone connected with it for loss or
damages suffered through reliance on any information contained within it. In no event will Autodata Publications Inc. be liable for any damages, direct or indirect, consequential or compensatory, including, without limitation, lost profits, for any representations, breaches or defaults arising out of the use of this information.
Model:
Year:
Cutlass Supreme 3.4L V6
1996
Grand Prix 3.4L V6
1996
Model:
Year:
Lumina 3.4L V6
1996-97
Monte Carlo 3.4L V6
1996-97
Engine Identification:
VIN code = X
457TBIS273P
CHEVROLET
u
OLDSMOBILE
u
PONTIAC
