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TIMING BELT & SPROCKETS R & I NOTE: Some procedures may differ slightly due to engine construction. Removal 1) Remove all necessary air ducts. Position No. 4 piston at TDC of compression stroke. Align timing marks. See Fig. 2. Remove fan and fan shroud. Remove belts. If necessary, remove radiator and splashguard. 2) Prevent engine from rotating and remove crankshaft timing pulley retaining bolt. Remove upper and lower timing belt covers. Remove spring from tension pulley. Loosen adjusting bolt and move pulley toward water pump. Remove timing belt. CAUTION: Ensure pistons are at TDC when rotating camshaft or damage may result. Inspection 1) Handle timing belt carefully. Avoid twisting or kinking belt. Do not allow belt to become contaminated by water, oil, dirt or other contaminates. Inspect belt for cracks or damage. If necessary, replace. 2) Measure tension pulley spring length and force. Spring length should not exceed 2.76" (70.2 mm) and spring force should not be less than 197-347 lbs. (27-48 kg). 3) Replace tension pulley spring if not within specification. Installation 1) Pull tensioner fully toward water pump side and temporarily tighten retaining bolt. Ensure No. 4 cylinder is at TDC on compression stroke by rotating crankshaft until keyway aligns with mark on front crankshaft seal housing (12 o'clock). Rotate camshaft until timing mark on cam gear (arrow) aligns with mark on upper camshaft cover (notch). See Fig. 2. NOTE: When timing marks are aligned as stated above, No. 4 piston is at TDC on compression stroke. 2) Position timing belt over crankshaft sprocket, oil pump sprocket, camshaft sprocket and tensioner in that order. Ensure belt is positioned in sequence given and without slack between sprockets. Loosen tension sprocket adjusting bolt allowing spring tension to tighten belt. Tighten adjusting bolt temporarily. 3) Temporarily install crankshaft pulley bolt and rotate crankshaft 2 complete revolutions in opposite direction of engine rotation, until marks on crankshaft and front oil seal retainer are aligned again. See Fig. 2. Loosen tensioner lock bolt, allowing tesioner spring to fully adjust tension. Tighten tensioner lock bolt. 4) Install timing belt covers. To complete installation, reverse removal procedures. Tighten all bolts to specification. See TORQUE SPECIFICATIONS table at end of this article. Fig. 2: 2.3L & 2.6L Timing Alignment Marks Courtesy of Isuzu Motor Co
Disconnect the negative battery cable, then partially drain and recover the cooling system.
Remove the coolant recovery reservoir.
If equipped, remove the A/C belt.
Remove the serpentine belt.
Disconnect the evaporative emission pipe assembly.
Remove the crankshaft pulley assembly.
As outlined earlier, remove the timing belt front cover.
Align the marks on the crankshaft sprocket with the marks on the rear timing belt cover by rotating the crankshaft.
Loosen the water pump retaining bolts, and release the tension with tool J 33039-A or equivalent.
Carefully lower the vehicle, then remove the timing belt.
Fig. 12: Timing belt installation and tightening specifications — 1993–94 2.0L OHC engines
Turn the crankshaft and camshaft gears clockwise to align the timing marks on the gears with the timing marks on the rear cover.
Install the timing belt, making sure that the portion between the camshaft gear and crankshaft gear is in tension.
Using tool J 33039-A, or equivalent adjustment tool, turn the coolant pump eccentric clockwise until the tensioner arm contacts the high torque stop. Tighten the water pump screws slightly.
Turn the engine by the crankshaft gear bolt 720°clockwise to fully seat the belt into the gear teeth.
Turn the coolant pump eccentric counter clockwise until the hole in the tensioner arm is aligned with the hole in the base. This must be done with the engine at room temperature, approximately 68°F (20°C).
Tighten the water pump screws while checking that the tensioner holes remain as adjusted as in step 15.
As outlined earlier, install the timing belt cover.
Install the crankshaft pulley.
Connect the evaporative emission pipe assembly.
Install the serpentine drive belt and the A/C belt (if equipped).
Install the coolant recovery reservoir.
Properly fill the cooling system, then connect the negative battery cable.
Disconnect battery ground cable, then drain coolant. Remove accessory drive belts. Remove A/C compressor drive belt idler pulley (tensioner) bolts, then idler pulley (tensioner). Remove upper radiator hose bracket bolt. Loosen two upper radiator hose clamps, then remove upper hose and bracket. Remove coolant bypass hose between thermostat housing and intake manifold coolant outlet. Disconnect main wiring harness from upper front cover (timing belt) cover, then remove eight upper timing belt cover bolts, then the upper cover, Fig. 20. Raise and support vehicle. Remove right front wheel and tire assembly and splash shield. Use strap wrench tool No. D85L-6000-A, or equivalent, to hold water pump pulley while removing water pump pulley bolts. Remove water pump pulley from water pump. Remove crankshaft pulley. Remove five lower timing belt cover attaching bolts and the cover. Rotate crankshaft in a clockwise direction to align crankshaft and camshaft sprocket timing marks, Fig. 21. If timing belt is to be reused, mark direction of rotation. Loosen timing belt tensioner nut, then remove timing belt. CAUTION: With timing belt removed, avoid turning camshaft or crankshaft. If movement is required, exercise extreme caution to avoid valve damage caused by piston contact. Take care
10.Turn the crankshaft pulley, and align its groove with timing mark "T" of the timing belt cover. Check that the timing mark of camshaft sprocket is aligned with the timing mark of cylinder head cover. (No.1 cylinder compression TDC position)
11.Remove the crankshaft pulley bolt and crankshaft pulley
12.Remove the crankshaft flange
13.Remove the 4 bolts and timing belt lower cover
14.Remove the timing belt tensioner and timing belt.
15.Remove the bolt and timing belt idler
16.Remove the crankshaft sprocket
17.Remove the cylinder head cover.
(1)Remove the wire harness bracket
(2)Remove the ignition coil.
(3)Remove the PCV (Positive Crankcase Ventilation) hose and the breather hose from the cylinder head cover
(4)Remove the engine cover bracket
(5)Loosen the cylinder head cover bolts and then remove the cover and gasket.
18.Remove the camshaft sprocket.
Hold the portion of the camshaft with a hexagonal wrench, and remove the bolt with a wrench and remove the camshaft sprocket.
1.Install the camshaft sprocket and tighten the bolt to the specified torque.
(1)Temporarily install the camshaft sprocket bolt
(2)Hold the portion of the camshaft with a hexagonal wrench, and tighten the bolt with a wrench Tightening torque :78.5 ~ 98.1N.m (8.0 ~ 10.0kgf.m, 57.9 ~ 72.3lb-ft)
2.Install the cylinder head cover.
(1)Install the cylinder head cover and bolts Tightening torque :7.8 ~ 9.8N.m (0.8 ~ 1.0kgf.m, 5.8 ~ 7.2lb-ft)
(2)Install the engine cover bracket
(3)Install the PCV(Positive Crankcase Ventilation) hose and breather hose to the cylinder head cover.
(4)Install the ignition coil.
3.Install the crankshaft sprocket
4.Align the timing marks of the camshaft sprocket and crankshaft sprocket with the No.1 piston placed at top dead center and its compression stroke.
5.Install the idler pulley and tighten the bolt to the specified torque.
(3)Then recheck the belt tension. Verify that when the tensioner and the tension side of the timing belt are pushed in horizontally with a moderate force [approx. 49N (11lb)], the timing belt cog end is aprox. 1/2 of the tensioner mounting bolt head radius (across flats) away from the bolt head center.
4)Timing belt tension measuring procedure (by a sonic tension guage) Rotate crankshaft in clockwise direction to set 1st piston on top dead center (TDC) and rotate crankshaft in counterclockwise to 90° then measure the belt tension in the middle of tension side span (in arrow direction of above illustration) by free vibration method.
9.Turn the crankshaft two turns in the operating direction (clockwise) and realign crankshaft sprocket and camshaft sprocket timing mark.
10.Install the timing belt lower cover with 5bolts
Drain the cooling system. Refer to Section 03-03 for the procedure.
Disconnect the battery ground cable (14301) .
Remove the generator drive belt, water pump and power steering pump drive belt, and the A/C compressor drive belt (if equipped). Refer to Section 03-05 for the removal procedure.
If equipped, remove the three A/C compressor drive belt idler pulley bolts and the A/C compressor drive belt idler pulley.
Remove the upper radiator hose bracket bolt.
Loosen the two upper radiator hose clamps and remove the radiator hose bracket bolt. Remove the upper radiator hose (8260) and the upper radiator hose bracket from the vehicle.
Remove the water bypass hose (8597) from between the thermostat housing and the water hose connection (8592) .
Remove the main wiring harness from the upper engine front cover (6019) .
Remove the eight upper engine front cover bolts and the upper engine front cover .
Raise and support the vehicle.
Remove the RH front wheel and tire assembly.
Remove the four RH outer engine and transmission splash shield bolts and two screws and remove the RH outer engine and transmission splash shield (6775) .
Use Strap Wrench 303-D055 (D85L-6000-A) or equivalent to hold the water pump pulley (8509) while removing the four water pump pulley bolts.
Remove the water pump pulley from the water pump (8501) .
Remove the crankshaft pulley (6312) . Refer to the procedure in this section.
Remove the five lower engine front cover bolts and the lower engine front cover .
Ensure that the timing marks between the crankshaft sprocket (6306) and the oil pump housing line up.
NOTE: The directional arrow is necessary to ensure that the timing chain/belt (6268) can be reinstalled in the same direction.
Loosen the timing chain/belt tensioner nut.
Remove the timing chain/belt .
Installation NOTE: Ensure that the timing marks on the camshaft sprockets (6256) and the seal plate are properly aligned. Ensure that the timing marks on the crankshaft sprocket and the oil pump housing are still aligned.
NOTE: A new timing chain/belt has three white timing marks that indicate the correct timing positions of the camshafts (6250) and the crankshaft (6303) . These marks will help ensure that the engine (6007) is timed properly. When the engine is properly timed each white timing mark on the timing chain/belt will be aligned with the corresponding camshaft and crankshaft timing mark on the sprocket. Because the white timing marks are not evenly spaced you will need to refer to the following illustration for proper timing chain/belt placement. There should be 40 timing belt teeth between the timing marks of the front and rear camshaft sprockets and 43 teeth between the timing mark on the front camshaft sprocket and the timing mark on the crankshaft sprocket .
NOTE: Verify that the camshaft timing marks are aligned with the timing marks on the seal plate, and that the crankshaft sprocket timing mark is aligned with the timing mark on the oil pump (6600) .
Install the timing chain/belt starting at the crankshaft sprocket and moving around to the camshaft sprocket following a counterclockwise path. Do not allow any slack in the timing chain/belt between the timing sprockets. After all of the timing marks are matched up with the timing chain/belt installed, slip the timing chain/belt onto the timing chain/belt tensioner .
It is recommended that the timing belt be replaced periodically to
assure correct engine performance. Because of their composition, timing
belts wear over a period of time and mileage. To avoid vehicle break
down and possible engine damage, the manufacturer recommends timing
belt replacement at 60,000 miles.
REMOVAL & INSTALLATION1.8L Engine See Figures 1, 2 and 3
If possible, position the engine so the No. 1 piston is at TDC.
Disconnect the negative battery cable.
Remove the timing belt covers.
Remove the timing (outer) belt tensioner and remove the outer timing belt.
Remove the outer crankshaft sprocket and flange.
Remove the silent shaft (inner) belt tensioner and remove the belt.
Fig. 1: Silent shaft belt timing marks-1.8L engine
Fig. 2: Checking the silent shafts for proper positioning
Fig. 3: Timing belt timing mark alignment-1.8L engine
Align the timing marks of the silent shaft sprockets and the
crankshaft sprocket with the timing marks on the front case. Wrap the
timing belt around the sprockets so there is no slack in the upper span
of the belt and the timing marks are still aligned.
Install the tensioner pulley and move the pulley by hand so the long side of the belt deflects about
Hold the pulley tightly so the pulley cannot rotate when the bolt
is tigthened. Tighten the bolt to 15 ft. lbs. (20 Nm) and recheck the
Install the timing belt tensioner fully toward the water pump and
tighten the bolts. Place the upper end of the spring against the water
Align the timing marks of the camshaft, crankshaft and oil pump
sprockets with their corresponding marks on the front case or rear
There is a possibility to align all timing marks and have the oil
pump sprocket and silent shaft out of time, causing an engine vibration
during operation. If the following step is not followed exactly, there
is a 50 percent chance that the silent shaft alignment will be 180
Before installing the timing belt, ensure that the left side
(rear) silent shaft (oil pump sprocket) is in the correct position as
Remove the plug from the rear side of the block and insert a tool with shaft diameter of 0.31 in. (8mm) into the hole.
With the timing marks still aligned, the shaft of the tool must
be able to go in at least 2 1/2 in. If the tool can only go in about 1
in., the shaft is not in the correct orientation and will cause a
vibration during engine operation. Remove the tool from the hole and
turn the oil pump sprocket 1 complete revolution. Realign the timing
marks and insert the tool. The shaft of the tool must go in at least 2
Recheck and realign the timing mark.
Leave the tool in place to hold the silent shaft while continuing.
Install the belt to the crankshaft sprocket, oil pump sprocket,
then camshaft sprocket, in that order. While doing so, make sure there
is no slack between the sprocket except where the tensioner is
Recheck the timing marks' alignment. If all are aligned, loosen
the tensioner mounting bolt and allow the tensioner to apply tension to
Remove the tool that is holding the silent shaft and rotate the
crankshaft a distance equal to 2 teeth on the camshaft sprocket. This
will allow the tensioner to automatically apply the proper tension on
the belt. Do not manually overtigthen the belt or it will howl.
Tigthen the lower mounting bolt first, then the upper spacer bolt.
To verify correct belt tension, check that the deflection at the longest span of the belt is about
Install the timing belt covers and all related items.
Connect the negative battery cable.
2.0L Engine 1990-94 VEHICLES See Figures 4, 5, 6 and 7
Disconnect the negative battery cable.
Remove the timing belt upper and lower covers.
Rotate the crankshaft clockwise and align the timing marks so No.
1 piston will be at TDC of the compression stroke. At this time the
timing marks on the camshaft sprocket and the upper surface of the
cylinder head should coincide, and the dowel pin of the camshaft
sprocket should be at the upper side.
Always rotate the crankshaft in a clockwise direction. Make a mark
on the back of the timing belt indicating the direction of rotation so
it may be reassembled in the same direction if it is to be reused.
Remove the auto tensioner and remove the outermost timing belt.
Fig. 4: Exploded view of the timing belt and sprockets-1990-94 2.0L engines
Remove the timing belt tensioner pulley, tensioner arm, idler pulley, oil pump sprocket, special washer, flange and spacer.
Remove the silent shaft (inner) belt tensioner and remove the belt.
Remove the crankshaft retaining bolts, then remove the pulley.
Remove the crankshaft sprocket retainer bolt and washer from the
sprocket, if used, and remove the sprocket. If the sprocket is hard to
removed, the proper puller may be used. If no bolts are used on the
sprocket. Use the correct puller to remove.
Hold the camshaft stationary using the hexagon cast between
journals No. 2 and 3 and remove the retainer bolt. Remove the sprocket
from the camshaft.
Install the sprockets to their appropriate shafts. Install the
retainer bolts and tighten the camshaft sprocket bolt to 65 ft. lbs.
Check both tensioner and idler pulley for bearing wear, and replace if needed.
Align the timing marks on the crankshaft sprocket and the silent
shaft sprocket. Fit the inner timing belt over the crankshaft and
silent shaft sprocket. Ensure that there is no slack in the belt.
Fig. 5: Align the camshaft sprocket so marks face each other and
are in alignment with the top surface of the cylinder head-1990-94 2.0L
Fig. 6: Align the crankshaft timing mark and the oil pump sprocket timing mark-1990-94 2.0L engine
Fig. 7: Timing marks in alignment-1990-94 2.0L engine
While holding the inner timing belt tensioner with your fingers,
adjust the timing belt tension by applying a force towards the center
of the belt, until the tension side of the belt is taut. Tighten the
When tightening the bolt of the tensioner, ensure that the tensioner
pulley shaft does not rotate with the bolt. Allowing it to rotate with
the bolt can cause excessive tension on the belt.
Check belt for proper tension by depressing the belt on its' long
side with your finger and noting the belt deflection. The desired
reading is 0.20-0.28 in. (5-7mm). If tension is not correct, readjust
and check belt deflection.
Install the flange, crankshaft and washer to the crankshaft. The
flange on the crankshaft sprocket must be installed towards the inner
timing belt sprocket. Tighten bolt to 80-94 ft. lbs. (110-130 Nm).
To install the oil pump sprocket, insert a Phillips screwdriver
with a shaft 0.31 in. (8mm) in diameter into the plug hole in the left
side of the cylinder block to hold the left silent shaft. Tighten the
nut to 36-43 ft. lbs. (50-60 Nm).
1. Remove the alternator & power steering pump drive belts.
2. Remove four (4) 10mm bolts holding the water pump pullys & remove the pullys.
3. Drain the Radiator (save coolant if intend to reuse).
4. Loosen & remove AC compressor belt.
5. Remove crankshaft pully (22mm bolt).
6. Remove lower timing belt cover (10 mm bolts) to access water pump bolts.
7. Remove the water pump (12mm bolts) (1)Remove the 2 bolts, then remove the alternator brace (A).(2)Remove the water pump (B) and gasket.
8. Clean mating surface on engine & install new gasket & pump - reassemble. Refill w/50-50 coolant.
I don't have pictures for you but here is instructions:
Drain all the coolant.
Jack up the car on the front passenger side.
Remove the passenger side wheel.
Put a jack under the oil pan.
Detach the engine mounts on the passenger side of the car.
Remove all external belts.
Remove the upper timing belt cover bolts
Lower the engine using the jack.
Remove the water pump pulley. (3 bolts)
Remove the upper timing belt cover.
Disconnect the coolant line running across the front of the engine from the water pump. (2 bolts on a flange)
Pull the timing belt.
Pull the water pump.
Installation is just reversed.
If you need images, go to your local library. I never bought a manual, where is the fun in that? LOL plus everything I need to know can be found on the internet.