Page 1878 of 4264
6A-54 ENGINE MECHANICAL (6VE1 3.5L)
5. Water jacket sealing plugs seating surfaces.
Reassembly
1. Install spark plug and tighten all the spark plugs to
specified torque.
Torque: 18 Nm (1.8 kgm/13 lb ft)
2. Tighten sub gear setting bolt.
1. Use 5884024430 gear spring lever to turn
sub gear to right direction until the M5 bol
t
aligns with the hole between camshaft driven
gear and sub gear.
2. Tighten the M5 bolt to a suitable torque to
prevent the sub gear from moving.
014RW041
3. Install camshaft drive gear assembly and tighten
three bolts to the specified torque.
Torque: 10 N
m (1.0 kg
m/7 lb ft)
4. Install camshaft assembly and camshaft brackets,
tighten twenty bolts on one side bank to the
specified torque.
1. Apply engine oil to camshaft journal and
bearing surface of camshaft bracket.
2.
Align timing mark on intake camshaft (one dot
for right bank, two dots for left bank) and
exhaust camshaft (one dot for right bank, two
dots for left bank) to timing mark on camshaf
t
drive gear (one dot).
014RW020
Legend
(1) Intake Camshaft Timing Gear for Right Bank
(2) Intake Camshaft Timing Gear for Left Bank
(3) Exhaust Camshaft Timing Gear
(4) Discrimination Mark
LI: Left Bank Intake
RI: Right Bank Intake
LE: Left Bank Exhaust
RE: Right Bank Exhaust
014RW023
Legend
(1) Right Bank Camshaft Drive Gear
(2) Left Bank Camshaft Drive Gear
(3) Timing Mark on Drive Gear
(4) Dowel Pin
Page 1880 of 4264
6A-56 ENGINE MECHANICAL (6VE1 3.5L)
Valve Spring, Oil Controller, Valve, Valve Guide
Valve Spring, Oil Controller, Valve, Valve Guide and Associated Parts
014RW039
Legend
(1) Camshaft Bracket Fixing Bolts
(2) Camshaft Assembly Inlet
(3) Camshaft Assembly Exhaust
(4) Shim
(5) Tappet
(6) Split Collar
(7) Spring Upper Seat
(8) Valve Spring
(9) Oil Controller
(10) Spring Lower Seat
(11) Valve Guide
(12) Valve
Page 1881 of 4264
ENGINE MECHANICAL (6VE1 3.5L) 6A-57
Disassembly
1. Remove camshaft bracket fixing bolts (1).
2. Remove camshaft assembly (intake).
3. Remove camshaft assembly (Exhaust side).
4. Remove shim (4) and tappet (5).
5. Use the 5884024460 valve spring compresso
r
and 5884025470 valve spring compressor
adapter to remove split collar.
014RW042
6. Remove valve spring.
7. Remove valve.
8. Remove oil controller and spring lower seat.
9. Remove the valve guide using the 5884024420
valve guide replacer.
Inspection and Repair
Valve Spring
CAUTION: Visually inspect the valve springs and
replace them if damage or abnormal wear is
evident.
1. Measure the free height of the springs. The
springs must be replaced if the free height is belo
w
the specified limit.
Standard: 44.6 mm (1.756 in)
Limit: 43.6 mm (1.717 in)
014RS004
2. Measure the valve spring squareness with a steel
square and replace the valve springs if the
measured value exceeds the specified limit.
Limit: 2 mm (0.079 in)
014RS005
3. Using a spring tester to compress the springs to
the installed height, measure the compressed
spring tension, and replace the springs if the
measured tension is below the specified limit.
At installed height: 35.0 mm (1.38 in)
Standard: 196 N (44 lb)
Limit: Less than 181 N (41 lb)
Page 1883 of 4264
ENGINE MECHANICAL (6VE1 3.5L) 6A-59
Valve Guide Replacement
1. Using Valve guide replacer: 5884024420,
drive out the valve guide from the combustion
chamber side.
014RS008
2. Apply engine oil to the outside of the valve guide.
Using valve guide replacer 5884024420,
drive in a new valve guide from the camshaft side,
and check the valve guide height.
Valve guide upper end height: 13.0 mm (0.5118
in)
(Measured from the cylinder head upper face)
014RW046
3. Check the clearance. If the clearance is less than
the specified value, ream the inside diameter o
f
valve guide. Using a sharp 6 mm reamer, ream the
valve guide to obtain the specified clearance.
Valve Seat
1. Measure the protrusion of the valve stem when a
new valve is installed in the cylinder head. If the
protrusion of the valve stem exceeds the limit,
replace the valve seat insert or the cylinder head
assembly.
Protrusion of valve stem
Intake
Standard: 39.32 mm (1.5480 in)
Limit: 39.47 mm (1.5539 in)
Exhaust
Standard: 39.30 mm (1.5472 in)
Limit: 39.45 mm (1.5531 in)
014RW047
Page 1885 of 4264
ENGINE MECHANICAL (6VE1 3.5L) 6A-61
Valve Seat Insert Replacement
1. Arc weld the rod at several points. Be careful not
to damage the aluminum section.
2.
Allow the rod to cool for a few minutes. This will
cause the valve seat to shrink.
3. Strike the rod and pull it out.
014RS015
4. Carefully clean the valve seat pressfit section on
the cylinder head side.
5. Heat the pressfit section with steam or some
other means to cause expansion. Cool the valve
seat with dry ice or some other means.
6. Insert the pressfit section into the valve sea
t
horizontally.
Standard fitting interference: 0.14 mm
0.09 mm
(0.0055 in
0.0035 in)
7.
After insertion, use a seat grinder to grind finish
the seating face. Carefully note the seating angle,
the contact width, and the depression.
8. Lap the valve and the seat.
Reassembly
1. Install valve guide (1) to cylinder head. Apply
engine oil to the outside of the valve guide. Using
valve guide replacer 5884024420, drive in a
new valve guide from the camshaft side.
2. Install oil controller (3) and spring lower seat (2).
Using oil controller replacer 5884006230, drive
in a new oil controller.
014RW058
3. Install valve to valve guide. Before install valve
guide apply engine oil to the outside of the valve
stem.
4. Install valve spring to cylinder head. Attach the
valve spring to the lower spring seat. The painted
area of the valve spring should be facing
downward.
014RS020
Page 1886 of 4264
6A-62 ENGINE MECHANICAL (6VE1 3.5L)
5. Install lower valve spring seat, valve spring and
upper valve spring seat then put split collars on the
upper spring seat, using the 5884024460 valve
spring compresor and 5884025470 valve
spring compressor adapter to install the spli
t
collars.
014RW042
6. Install tappet with shim.
7. Install camshaft assembly.
Refer to installation procedure for Camshaft in
this manual.
Valve Clearance Adjustments
NOTE: To adjust valve clearance, apply engine oil to
the cam as well as to the adjusting shim (2) with the
cylinder head built on the cylinder block, give a fe
w
turns to the camshaft by means of timing pulley
tightening bolt, and measure valve clearance when the
nose of cam is just opposite to maximum cam lift (1) as
shown in illustration below.
014RW081
Legend
(1) Cam
(2) Shim
(3) Tappet
Valve Clearance Standard Value (cold)
Intake: 0.23 mm
0.33 mm
(0.0091 in
0.0130 in)
Exhaust: 0.25 mm
0.35 mm
(0.0098 in
0.0138 in)
Selection of Adjusting Shim
Shim to be selected = (Thickness of removed
shim) + (Valve clearance measurement Standard
value) Based on the above formula, the best suited
shim should be selected from 41 sorts of shim
(differently thick at 0.02mm (0.0008 in) intervals from
2.40mm (0.0945 in) through 3.2mm (0.1260 in) thick).
Install the shim and check valve clearance.
Page 1888 of 4264
6A-64 ENGINE MECHANICAL (6VE1 3.5L)
Camshaft
Camshaft and Associated Parts
014RW040
Legend
(1) Camshaft Bracket Fixing Bolt
(2) Camshaft Bracket
(3) Camshaft Assembly Intake
(4) Camshaft Assembly Exhaust
(5) Pulley Fixing Bolt
(6) Camshaft Drive Gear Pulley
(7) Retainer Fixing Bolt
(8) Retainer
(9) Camshaft Drive Gear
(10) Oil Seal
Disassembly
1. Remove fixing bolt (5) for camshaft drive gear
pulley using 588402447–0 universal
holder.
Page 1890 of 4264
6A-66 ENGINE MECHANICAL (6VE1 3.5L)
3. Place the camshaft on Vblocks.
Slowly rotate the camshaft and measure the
runout with a dial indicator.
Replace the camshaft if the runout exceeds the
specified limit.
Run out
Limit: 0.1 mm (0.0039 in)
014RW044
4. Measure the camshaft journal oil clearance.
1. Measure the camshaft bracket housing inside
diameter.
NOTE: Tighten camshaft bracket (2) to specified torque
before measuring the camshaft bracket inside diameter.
Torque : 10 N
m (1.0 kg
m/7 lb ft)
014RW031
2. Subtract the camshaft outside diameter from the
camshaft bracket housing inside diameter.
Oil Clearance
Standard : 0.027 mm
0.078 mm(0.0011 in
0.0031
in)
Limit : 0.11 mm (0.0043 in)
014RW037
5. Replace the cylinder head and/or camshaft if the
measured oil clearance exceeds the specified
limit.
1. Carefully clean the camshaft journal, the
camshaft bracket, and the cylinder head.
2. Install camshaft assembly and camshaf
t
brackets (2), tighten twenty bolts (1) on one
side bank to the specified torque.
Torque: 10 N
m (1.0 kg
m/7 lb ft)
014RW031
