Mechanics

WHEN ALIGNING CAMSHAFT SPROCKET'S, SHOUD THE RIGHT SPROCKET BE IN THE MIDDLE OF THE STROKE?

2000 Toyota Prado • 230 miles

I just put in a new timing belt, guide pulley, tensioner pully and tensioner guide pulley. The engine has lost power and as the timing was reading 15 - 20 degress, I renewed timing belt as it hadn't been done on the vehicle since I had it. I put all timing marks as they were for the camshaft sprockets. However to do this, the right one was sitting in the middle of the stroke, but the left sat nicely at the end of the stroke. I adjusted the crankshaft sproket slightly as it was not aligning with timing mark. All back together and the timing is now 10 - 15 degress. There are only 3 high tension leads, and 3 coils. So I would have expected that the stroke alignment on both camshafts would be in the same position. So this is the question, should the cams be aligned exactly as the spark fires at the same time? Or should they be slightly out of alignment?

Thanks
Avatar
Kgunja
December 30, 2011.



TIMING BELT REPLACEMENT - 4.7L V8 -2000 Toyota Land Cruiser
Page 1 of 8
ARTICLE BEGINNING

Tips Click a link to view tip
Question: Different Procedures for timing belt replacment? Tip: Drive belt tensioner, removal procedure
Tim__G
JJdaCool
MANUFACTURER'S SUGGESTED SCHEDULED MAINTENANCE

The manufacturer recommends the belt be replaced at 90,000 miles or 72 months.
REMOVAL & INSTALLATION

CAUTION: This application is an interference engine. Do not rotate camshaft
or crankshaft when timing belt is removed, or engine damage may occur.
TIMING BELT

WARNING: To prevent air bag deployment, disconnect negative battery cable at least 90 seconds before working on vehicle.
Removal (Land Cruiser & LX 470)

1.
Raise and support vehicle. Remove oil pan protector. Remove lower engine cover. Drain cooling system. Remove battery clamp cover. Remove "V" bank cover located on top of
engine. Remove air cleaner assembly with air intake hose that goes to throttle body.
Loosen 4 bolts/nuts holding fluid coupling to cooling fan bracket. See Fig. 1
serpentine drive belt, cooling fan fluid coupling assembly, and fan pulley.
Remove radiator assembly. Remove pulley bolt, cover plate and drive belt idler pulley. Remove No. 3 timing belt cover from front of passenger's side camshaft.
4. Disconnect engine wiring harness clamps for access to No. 3 timing belt cover at front of driver's side camshaft. Disconnect electrical connectors from Camshaft Position (CMP) sensor
on No. 3 timing belt cover. Remove No. 3 timing belt cover. See Fig. 1.
Remove oil cooler pipe. Remove No. 2 timing belt cover. Remove A/C compressor with hoses attached, and set aside. Remove cooling fan bracket.
. Remove
2.
3.
5.
CAUTION: If reusing timing belt, ensure installation mark exists at
crankshaft and camshaft sprockets. If installation mark does
not exist, place mating marks on timing belt and crankshaft sprocket. See Fig. 3. Also, place arrow on belt indicating
direction of rotation.

12/30/2011
TIMING BELT REPLACEMENT - 4.7L V8 -2000 Toyota Land Cruiser
Page 2 of 8
6.
Using Pulley Holder (09213-70010 or 09213-70010) and Handle (09330-00021), hold crankshaft pulley. Loosen crankshaft pulley bolt.
Rotate crankshaft CLOCKWISE (viewed from front of engine) so crankshaft pulley groove aligns with "0" timing mark on No. 1 (lower) timing belt cover. See Fig. 2. Ensure timing
marks on camshaft sprockets align with marks on the timing belt rear plates. See Fig. 3. If timing marks are not aligned, rotate crankshaft CLOCKWISE one full revolution. Realign
crankshaft pulley groove with "0" timing mark on No. 1 (lower) timing belt cover.
7.
CAUTION: If the timing belt is disengaged with the crankshaft pulley at
the wrong angle, this can cause the piston head and valve head to come into contact with each other when you remove
the camshaft timing pulley, causing damage. Always set the crankshaft pulley at the correct angle.
8.
On 1998-2002 models only, using crankshaft pulley bolt, rotate crankshaft CLOCKWISE (viewed from front of engine) about 50 degrees ATDC. This will align crankshaft pulley
groove with centerline of crankshaft pulley bolt and No. 2 idler pulley bolt. See Fig. 4. This prevents valves from contacting pistons. On all models, remove crankshaft pulley bolt.
NOTE: When re-using timing belt: If the installation marks have disappeared, before removal of the timing belt, place 2 new
installation marks on the timing belt to match the timing marks of
the camshaft timing pulleys.
NOTE: When replacing timing belt tensioner only: To maintain meshing
of the timing pulley and timing belt, secure one of them with string. Place matchmarks on the timing belt and passenger's side
camshaft timing pulley.
9.
Alternately loosen bolts, and remove timing belt tensioner and dust boot. Using spanner wrench in holes in camshaft sprocket, slightly rotate passenger's side camshaft sprocket
CLOCKWISE to release timing belt tension. Remove timing belt from camshaft sprockets.
Remove serpentine drive belt tensioner. See Fig. 1
crankshaft rotate, use puller to remove crankshaft pulley. Remove No. 1 timing belt cover. Noting direction of timing belt guide for installation reference, remove timing belt guide
(Crankshaft Position (CKP) sensor plate) and timing belt cover spacer. Remove timing belt.
. Remove generator. Without letting
10.
CAUTION: DO NOT use solvent to clean crankshaft or camshaft
sprockets. Wipe clean only.
Fig. 1: Exploded View Of Timing Belt & Components Courtesy of TOYOTA MOTOR SALES, U.S.A, INC.
Fig. 2: Aligning Crankshaft Timing Marks
Courtesy of TOYOTA MOTOR SALES, U.S.A, INC.
Fig. 3: Locating Timing Belt Alignment Marks Courtesy of TOYOTA MOTOR SALES, U.S.A, INC.

12/30/2011
TIMING BELT REPLACEMENT - 4.7L V8 -2000 Toyota Land Cruiser
Page 3 of 8
Fig. 4: Positioning Crankshaft Pulley
Courtesy of TOYOTA MOTOR SALES, U.S.A, INC.
Inspection (Land Cruiser & LX 470)

1.
Inspect timing belt for damaged teeth, cracking or oil contamination. Replace timing belt if damaged or contaminated. Check idler pulleys for smooth rotation. Replace idler pulleys if
defective. Inspect timing belt tensioner for signs of oil leakage. Replace timing belt tensioner if oil leakage exists.
NOTE: Timing belt tensioner may weep a small amount of oil on rod seal
under normal conditions. If excessive amount of oil exists,
replace timing belt tensioner. NEVER hold timing belt tensioner with push rod facing DOWN.
2.
Hold timing belt tensioner body and press rod against solid surface. Replace timing belt tensioner if rod moves.
Measure timing belt tensioner rod protrusion from end of rod to edge of housing. See Fig. 5
Replace timing belt tensioner if distance is not 0.413-0.453" (10.5-11.5 mm). Inspect water pump for leaks or bearing failure.
3.
.
Fig. 5: Measuring Timing Belt Tensioner Rod Protrusion Courtesy of TOYOTA MOTOR SALES, U.S.A, INC.
Installation (Land Cruiser & LX 470)

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Question: 05 tundra no crank after battery disconnect
Tech1
NOTE: Install timing belt with engine cold.
1.
If No. 1 idler pulley was removed, apply Loctite 242 or equivalent to bolt threads. Ensure pulley bracket moves freely.
Install timing belt on crankshaft sprocket. If reusing old belt, ensure match marks made on removal are properly aligned.
Place timing belt around No. 1 and No. 2 idler pulleys. Install gasket and timing belt cover spacer. Install timing belt guide with cupped side facing out away from crankshaft sprocket.
4. Install No. 1 timing belt cover. Align groove of crankshaft pulley with key in crankshaft. Tap crankshaft pulley until seated on crankshaft.
Install serpentine drive belt tensioner. Install generator. Tighten all fasteners to specification. See TORQUE SPECIFICATIONS. Ensure timing mark on crankshaft pulley aligns with
timing mark "0" of No. 1 (lower) timing belt cover. See Fig. 4.
Ensure timing mark on driver's side camshaft sprocket is correctly aligned. See Fig. 6
timing belt on driver's side camshaft sprocket. If reusing old belt, ensure matching marks are
2.
3.
5.
6.
. Install

12/30/2011
TIMING BELT REPLACEMENT - 4.7L V8 -2000 Toyota Land Cruiser
Page 4 of 8
aligned. Rotate driver's side camshaft sprocket COUNTERCLOCKWISE until tension exists on timing belt between crankshaft sprocket and driver's side camshaft sprocket.
Ensure passenger's side camshaft sprocket timing mark is still aligned. Install timing belt on passenger's side camshaft sprocket. If reusing old belt, ensure matching marks are aligned. See
Fig. 6.
Using press, SLOWLY apply about 220-2200 lbs. (100-1000 kg) of pressure on timing belt tensioner rod until rod is retracted and holes in rod and housing are aligned. See Fig. 7. Install
1.27 mm hexagon wrench through holes in housing and rod to hold rod in retracted position. Release press and install dust boot on timing belt tensioner. Install timing belt tensioner on
engine. Install and alternately tighten bolts to specification. See TORQUE SPECIFICATIONS.
7.
8.
9.
CAUTION: When checking valve timing, only rotate crankshaft CLOCKWISE as viewed from front of engine. DO NOT rotate
crankshaft COUNTERCLOCKWISE.
10.
Remove 1.27 mm hexagon wrench from timing belt tensioner. To check valve timing, rotate crankshaft pulley CLOCKWISE 2 full revolutions from TDC to TDC. Crankshaft pulley
groove must align with "0" timing mark on No. 1 (lower) timing belt cover.
With crankshaft at TDC position, ensure camshaft sprockets align with timing marks on rear plates. If installing old belt, ensure belt matching marks are aligned with camshaft sprockets. If
timing marks are not aligned, timing belt will have to be removed and repositioned.
Tighten crankshaft pulley bolt to specification. See TORQUE SPECIFICATIONS
fan bracket. Install A/C compressor. Install No. 2 and No. 3 timing belt covers. Install drive belt idler pulley. Install radiator. Install cooling fan assembly.
To install remaining components, reverse removal procedure. Tighten all fasteners to specification. See TORQUE SPECIFICATIONS. Fill and bleed air from cooling system.
See COOLING SYSTEM BLEEDING.
11.
. Install
12.
13.
Fig. 6: Installing Timing Belt On Camshaft Sprocket Courtesy of TOYOTA MOTOR SALES, U.S.A, INC.
Fig. 7: Retracting Timing Belt Tensioner Rod Courtesy of TOYOTA MOTOR SALES, U.S.A, INC.
Removal (Except Land Cruiser & LX 470)

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Tip: No need to remove A/C Compressor
Question: random miss on cyl 2 6 8 after belt replacement
TimGenz
Tech1
1.
Raise and support vehicle. Remove engine undercover. Drain cooling system. Remove radiator assembly. Remove throttle body cover. Remove intake air connector assembly.
Loosen 4 bolts holding fluid coupling to cooling fan bracket. See Fig. 1
drive belt, cooling fan fluid coupling assembly, and fan pulley.
2.
. Remove serpentine

12/30/2011
TIMING BELT REPLACEMENT - 4.7L V8 -2000 Toyota Land Cruiser
Page 5 of 8
3.
Remove power steering pump from engine with hoses attached, and secure out of way. Remove serpentine drive belt idler pulley. Remove No. 3 timing belt cover from front of
passenger's side camshaft.
4. Disconnect engine wiring harness clamps for access to No. 3 timing belt cover at front of driver's side camshaft. Disconnect electrical connectors from camshaft position sensor on No. 3
timing belt cover. Remove No. 3 timing belt cover. See Fig. 1.
Remove oil cooler pipe. Remove No. 2 timing belt cover. Remove A/C compressor with hoses attached, and set aside. Remove cooling fan bracket.
5.
CAUTION: If reusing timing belt, ensure installation marks exist at
crankshaft and camshaft sprockets on timing belt. If installation marks do not exist, place matching marks on
timing belt before removing timing belt. See Fig. 3. Also, place arrow on belt indicating direction of rotation.
6.
Using Pulley Holder (09213-70011) and Handle (09330-00021), hold crankshaft pulley. Loosen crankshaft pulley bolt.
Rotate crankshaft CLOCKWISE (viewed from front of engine) so crankshaft pulley groove aligns with "0" timing mark on No. 1 (lower) timing belt cover. See Fig. 2.
Ensure timing marks on camshaft sprockets align with marks on the timing belt rear plates. See Fig. 3. If timing marks are not aligned, rotate crankshaft CLOCKWISE one full revolution.
Realign crankshaft pulley groove with "0" timing mark on No. 1 (lower) timing belt cover). Remove crankshaft pulley bolt.
7.
8.
NOTE: When re-using timing belt: If the installation marks have disappeared, before removal of the timing belt, place 2 new
installation marks on the timing belt to match the timing marks of
the camshaft timing pulleys.
NOTE: When replacing timing belt tensioner only: To maintain meshing
of the timing pulley and timing belt, secure one of them with string. Place matchmarks on the timing belt and passenger's side
camshaft timing pulley.
9.
Remove generator. Alternately loosen bolts, and remove timing belt tensioner and dust boot. Using spanner wrench in holes in camshaft sprocket, slightly rotate passenger's side camshaft
sprocket CLOCKWISE to release timing belt tension. Remove timing belt from camshaft sprockets.
Remove serpentine drive belt tensioner. See Fig. 1
puller to remove crankshaft pulley. Remove No. 1 timing belt cover. Noting direction of timing belt guide for installation reference, remove timing belt guide (crankshaft position sensor plate)
and timing belt cover spacer. Remove timing belt.
. Without letting crankshaft rotate, use
10.
CAUTION: DO NOT use solvent to clean crankshaft or camshaft sprockets. Wipe clean only.

12/30/2011
TIMING BELT REPLACEMENT - 4.7L V8 -2000 Toyota Land Cruiser
Page 6 of 8
Inspection (Except Land Cruiser & LX 470)

1.
Inspect timing belt for damaged teeth, cracking or oil contamination. Replace timing belt if damaged or contaminated. Check idler pulleys for smooth rotation. Replace idler pulleys if
defective. Inspect timing belt tensioner for signs of oil leakage. Replace timing belt tensioner if oil leakage exists. Check timing belt cover gaskets and condition of covers.
NOTE: Timing belt tensioner may weep a small amount of oil on rod seal
under normal conditions. If excessive amount of oil exists,
replace timing belt tensioner. NEVER hold timing belt tensioner with push rod facing DOWN.
2.
DO NOT allow tensioner push rod to face downward. Hold timing belt tensioner body and press rod against solid surface. Replace timing belt tensioner if rod moves.
Measure timing belt tensioner rod protrusion from end of rod to edge of housing. See Fig. 5
Replace timing belt tensioner if distance is not 0.413-0.453" (10.5-11.5 mm). Inspect water pump for leaks or bearing failure.
3.
.
Installation (Except Land Cruiser & LX 470)

NOTE: Install timing belt with engine cold.
1.
If idler pulleys were removed, apply Loctite 242 or equivalent to bolt threads. Install idler pulleys and tighten bolts to specification. See TORQUE SPECIFICATIONS. Ensure pulley
bracket moves freely.
2. Install timing belt on crankshaft sprocket. If reusing old belt, ensure installation marks (made on removal) are properly aligned with crankshaft pulley.
Place timing belt around No. 1 and No. 2 idler pulleys. Install gasket and timing belt cover spacer. Install timing belt guide with cupped side away from crankshaft sprocket.
Install No. 1 timing belt cover. Align groove of crankshaft pulley with key in crankshaft. Using Crankshaft Front Oil Seal Replacer (SST 09223-46011) and a hammer, tap crankshaft pulley
until seated on crankshaft.
Install serpentine drive belt tensioner. Install generator. Tighten all fasteners to specification. See TORQUE SPECIFICATIONS. Ensure the crankshaft pulley groove aligns with "0"
timing mark on No. 1 timing belt cover. See Fig. 2.
Ensure timing mark on driver's side camshaft sprocket is correctly aligned. See Fig. 6
timing belt on driver's side camshaft sprocket. If reusing old belt, ensure matching marks are
aligned. Rotate driver's side camshaft sprocket COUNTERCLOCKWISE until tension exists on timing belt between crankshaft sprocket and driver's side camshaft sprocket.
Ensure passenger's side camshaft sprocket timing mark is still aligned. Install timing belt on passenger's side camshaft sprocket. If reusing old belt, ensure installation marks are aligned.
See Fig. 6.
Using press, SLOWLY apply about 220-2200 lbs. (100-1000 kg) of pressure on timing belt tensioner rod until rod is retracted and holes in rod and housing are aligned. See Fig. 7. Install
a 1.27 mm hexagon wrench through holes in housing and rod to hold rod in retracted position. Release press and install dust boot on timing belt tensioner. Install timing belt tensioner on
3.
4.
5.
. Install
6.
7.
8.
9.

12/30/2011
TIMING BELT REPLACEMENT - 4.7L V8 -2000 Toyota Land Cruiser
Page 7 of 8
engine. Install and alternately tighten bolts to specification.
CAUTION: When checking valve timing, only rotate crankshaft CLOCKWISE as viewed from front of engine. DO NOT rotate
crankshaft COUNTERCLOCKWISE.
10.
Remove 1.27 mm hexagon wrench from timing belt tensioner. To check valve timing, rotate crankshaft pulley CLOCKWISE 2 full revolutions from TDC to TDC. Crankshaft pulley
groove must align with "0" timing mark on No. 1 (lower) timing belt cover.
With crankshaft at TDC position, ensure camshaft sprockets align with timing marks on rear plates. If installing old belt, ensure belt installation marks are aligned with camshaft sprockets.
If installation marks are not aligned, timing belt will have to be removed and repositioned.
Tighten crankshaft pulley bolt to specification. See TORQUE
fan bracket. Install A/C compressor. Install No. 2 and No. 3 timing belt covers. Install drive belt idler pulley. Install radiator. Install cooling fan assembly.
To install remaining components, reverse removal procedure. Tighten all fasteners to specification. See TORQUE SPECIFICATIONS. Fill and bleed air from cooling system.
See COOLING SYSTEM BLEEDING.
11.
SPECIFICATIONS
12.
. Install
13.
COOLING SYSTEM BLEEDING

1.
Fill cooling system. Install radiator cap. Move heater control to warmest position. Start engine. Maintain engine speed at 2000-2500 RPM until engine is at normal operating temperature.
Shut engine off. Allow engine to cool. Recheck coolant level. Fill coolant level to FULL line on coolant reservoir if necessary.
2.
TORQUE SPECIFICATIONS

TORQUE SPECIFICATIONS Application
A/C Compressor-To-Mount Bolt Air Intake Chamber Bolt/Nut
Camshaft Sprocket Bolt Cooling Fan Bracket
12-mm Head 14-mm Head
Cooling Fan Fluid Coupling-To-Cooling Fan Bracket Except Sequoia
Sequoia
Crankshaft Pulley Bolt Drive Belt Idler Pulley Bolt
Drive Belt Tensioner Bolt/Nut Generator
Land Cruiser & LX 470 1998-02
Ft. Lbs. (N.M) 36 (49)
13 (18) 80 (109)
12 (16) 24 (32)
16 (21) 21 (29)
181 (245) 27 (37)
12 (16)
29 (39)

12/30/2011
TIMING BELT REPLACEMENT - 4.7L V8 -2000 Toyota Land Cruiser
Page 8 of 8
2003-04
10-mm Bolt & Nut 8-mm Nut
Sequoia
10-mm Bolt & Nut 8-mm Nut
Tundra
No. 1 & No. 2 Idler Pulley Bolt No. 2 Timing Belt Cover Bolt
Power Steering Pump
Land Cruiser, LX 470 & Sequoia Tundra
Bolt & Nut Stud Bolt
Radiator Bracket-To-Body Bolt Spark Plug
Timing Belt Tensioner Bolt Water Pump
Stud Bolt & Nut Bolt
29 (39) 16 (11)
29 (39) 16 (11)
29 (39)
25 (35) 12 (16)
(1)
13 (17)
33 (44) 16 (22)
12 (18) 13 (18) 19 (26)
13 (18) 15 (21)
INCH Lbs. (N.M) 44 (5.0)
66 (7.5) 106 (12)
66 (7.5)
Fan Shroud
No. 1 & No. 3 Timing Belt Cover Bolt Radiator Mounting Bolt
"V" Bank Cover Bolt
(1) Apply Loctite 242 or equivalent to idler pulley bolt threads.


Rivermikerat
Dec 30, 2011.