Main bearings torque NISSAN TEANA 2003 Service Manual

PRECAUTIONS
AT-7
D
E
F
G
H
I
J
K
L
MA
B
AT

PrecautionsBCS000ZG

Before connecting or disconnecting the TCM harness con-
nector, turn ignition switch OFF and disconnect negative
battery terminal. Failure to do so may damage the TCM.
Because battery voltage is applied to TCM even if ignition
switch is turned off.

When connecting or disconnecting pin connectors into or
from TCM, take care not to damage pin terminals (bend or
break).
Make sure that there are not any bends or breaks on TCM
pin terminal, when connecting pin connectors.

Before replacing TCM, perform TCM input/output signal
inspection and make sure whether TCM functions properly
or not. (See page AT- 6 4 , "
TCM Terminals and Reference
Val ue".)

After performing each TROUBLE DIAGNOSIS, perform
“DTC (Diagnostic Trouble Code) Confirmation Procedure”.
The DTC should not be displayed in the “DTC Confirmation
Procedure” if the repair is completed.

Before proceeding with disassembly, thoroughly clean the out-
side of the transaxle. It is important to prevent the internal parts
from becoming contaminated by dirt or other foreign matter.

Disassembly should be done in a clean work area.

Use lint-free cloth or towels for wiping parts clean. Common shop rags can leave fibers that could interfere
with the operation of the transaxle.

Place disassembled parts in order for easier and proper assembly.

All parts should be carefully cleaned with a general purpose, non-flammable solvent before inspection or
reassembly.

Gaskets, seals and O-rings should be replaced any time the transaxle is disassembled.

It is very important to perform functional tests whenever they are indicated.

The valve body contains precision parts and requires extreme care when parts are removed and serviced.
Place disassembled valve body parts in order for easier and proper assembly. Care will also prevent
springs and small parts from becoming scattered or lost.

Properly installed valves, sleeves, plugs, etc. will slide along bores in valve body under their own weight.

Before assembly, apply a coat of recommended ATF to all parts. Apply petroleum jelly to protect O-rings
and seals, or hold bearings and washers in place during assembly. Do not use grease.

Extreme care should be taken to avoid damage to O-rings, seals and gaskets when assembling.

After overhaul, refill the transaxle with new ATF.

When the A/T drain plug is removed, only some of the ATF is drained. Old ATF will remain in torque con-
verter and ATF cooling system.
Always follow the procedures under “Changing A/T Fluid” in the AT section when changing A/T fluid. Refer
to “Changing A/T Fluid”, AT- 1 4 , "
Checking A/T Fluid" .
SEF289H
AAT470A
MEF040DA

EM-86
[QR]
CYLINDER BLOCK

CAUTION:

Be careful not damage or deform signal plate mounted on
crankshaft.

When setting crankshaft on a flat floor surface, use a
block of wood to avoid interference between signal plate
and the floor surface.

Do not remove signal plate unless it is necessary to do
so.
NOTE:
When removing or installing signal plate, use TORX socket (size
T30).
17. Pull rear oil seal out from rear end of crankshaft.
CAUTION:
Be careful not to damage crankshaft.
NOTE:
When replacing rear oil seal without removing lower cylinder block, use screwdriver to pull it out from
between crankshaft and cylinder block.
18. Remove main bearings and thrust bearings from cylinder block and lower cylinder block.
CAUTION:
Identify installation positions, and store them without mixing them up.
ASSEMBLY
1. Fully air-blow engine coolant and engine oil passages in cylinder block, cylinder bore and crankcase to
remove any foreign material.
CAUTION:
Use a goggles to protect your eye.
2. Install each plug to cylinder block as shown in the figure.

Apply liquid gasket to the thread of water drain plug “A”.
Use Genuine Liquid Gasket or equivalent.

Apply liquid gasket to the thread of plug “C”.
Use Anaerobic Liquid Gasket or equivalent.

Tighten each plug as specified below.
NOTE:
Do not apply liquid gasket to the thread of plug “B”.
3. Install main bearings and thrust bearings with the following procedure:
a. Remove dust, dirt, and engine oil on the bearing mating surfaces of cylinder block and lower cylinder
block.
b. Install thrust bearings to the both sides of the No. 3 journal hous-
ing on cylinder block.

Install thrust bearings with the oil groove facing crankshaft
arm (outside).
SBIA0275E
Part Washer Tightening torque
A No 9.8 N·m (1.0 kg-m, 87 in-lb)
B Yes 53.9 N·m (5.5 kg-m, 40 ft-lb)
C Yes 62.8 N·m (6.4 kg-m, 46 ft-lb)
PBIC2626E
PBIC0264E

CYLINDER BLOCK
EM-103
[QR]
C
D
E
F
G
H
I
J
K
L
MA
EM


Measure the distortion on the cylinder block upper face at some
different points in six directions with straight edge and feeler
gauge.

If it exceeds the limit, replace cylinder block and lower cylinder
block assembly.
NOTE:
Cylinder block cannot be replaced as a single, because it is
machined together with lower cylinder block.
MAIN BEARING HOUSING INNER DIAMETER

Install lower cylinder block without main bearings installed, and
tighten lower cylinder mounting bolts to the specified torque.
Refer to EM-86, "
ASSEMBLY" for the tightening procedure.

Measure the inner diameter of main bearing housing with bore
gauge.

If out of the standard, replace cylinder block and lower cylinder
block assembly.
NOTE:
Cylinder block cannot be replaced as a single, because it is
machined together with lower cylinder block.
PISTON TO CYLINDER BORE CLEARANCE
Cylinder Bore Inner Diameter

Using bore gauge, measure the cylinder bore for wear, out-of-
round and taper at six different points on each cylinder. (“X” and
“Y” directions at “A”, “B” and “C”) (“Y” is in longitudinal direction
of engine)
NOTE:
When determining cylinder bore grade, measure the cylinder
bore at “B” position.

If the measured value exceeds the limit, or if there are scratches and/or seizure on the cylinder inner wall,
hone or re-bore the cylinder inner wall.

Oversize piston is provided. When using oversize piston, re-bore the cylinder so that the clearance of the
piston to cylinder bore satisfies the standard.
CAUTION:
When using an oversize piston, use oversize pistons for all cylinders with oversize piston rings.Limit: 0.1 mm (0.004 in)
PBIC0121E
Standard: 58.944 - 58.968 mm (2.3206 - 2.3216 in)
PBIC2012E
Standard inner diameter
: 89.010 - 89.030 mm (3.5043 - 3.5051 in)
Wear limit
: 0.2 mm (0.008 in)
Out-of-round (Difference between “X” and “Y”)
: 0.015 mm (0.0006 in)
Taper limit (Difference between “A” and “C”)
: 0.01 mm (0.0004 in)
Oversize (OS): 0.2 mm (0.008 in)
SBIA0284E

CYLINDER BLOCK
EM-105
[QR]
C
D
E
F
G
H
I
J
K
L
MA
EM

CRANKSHAFT PIN JOURNAL DIAMETER

Measure the outer diameter of crankshaft pin journal with micrometer.

If out of the standard, measure the connecting rod bearing oil clearance. Then use undersize bearing.
Refer to EM-105, "
CONNECTING ROD BEARING OIL CLEARANCE" .
OUT-OF-ROUND AND TAPER OF CRANKSHAFT

Measure the dimensions at four different points as shown in the
figure on each main journal and pin journal with micrometer.

Out-of-round is indicated by the difference in dimensions
between “X” and “Y” at “A” and “B”.

Taper is indicated by the difference in dimension between “A”
and “B” at “X” and “Y”.

If the measured valve exceeds the limit, correct or replace crankshaft.

If corrected, measure the bearing oil clearance of the corrected main journal and/or pin journal. Then
select main bearing and/or connecting rod bearing. Refer to EM-106, "
MAIN BEARING OIL CLEAR-
ANCE" and/or EM-105, "CONNECTING ROD BEARING OIL CLEARANCE" .
CRANKSHAFT RUNOUT

Place a V-block on a precise flat table to support the journals on
the both end of the crankshaft.

Place a dial indicator straight up on the No. 3 journal.

While rotating crankshaft, read the movement of the pointer on
the dial indicator. (Total indicator reading)

If it exceeds the limit, replace crankshaft.
CONNECTING ROD BEARING OIL CLEARANCE
Method by Calculation

Install connecting rod bearings to connecting rod and cap, and tighten connecting rod bolts to the speci-
fied torque. Refer to EM-86, "
ASSEMBLY" for the tightening procedure.

Measure the inner diameter of connecting rod bearing with
inside micrometer.
(Bearing oil clearance) = (Connecting rod bearing inner diame-
ter) – (Crankshaft pin journal diameter)

If the clearance exceeds the limit, select proper connecting rod
bearing according to connecting rod big end diameter and
crankshaft pin journal diameter to obtain specified bearing oil
clearance. Refer to EM-92, "
HOW TO SELECT CONNECTING
ROD BEARING" .
Method of Using Plastigage

Remove engine oil and dust on crankshaft pin and the surfaces of each bearing completely. Standard: 44.956 - 44.974 mm (1.7699-1.7706 in) dia.
Limit:
Out-of-round (Difference between “X” and “Y”)
: 0.005 mm (0.0002 in)
Taper (Difference between “A” and “B”)
: 0.005 mm (0.0002 in)
PBIC2203E
Limit : 0.03 mm (0.0012 in)
PBIC2541E
Standard : 0.028 - 0.045 mm (0.0011 - 0.0018 in)
Limit : 0.1 mm (0.004 in)
PBIC1642E

EM-106
[QR]
CYLINDER BLOCK


Cut a plastigage slightly shorter than the bearing width, and place it in crankshaft axial direction, avoiding
oil holes.

Install connecting rod bearings to connecting rod and cap, and tighten connecting rod bolts to the speci-
fied torque. Refer to EM-86, "
ASSEMBLY" for the tightening procedure.
CAUTION:
Do not rotate crankshaft.

Remove connecting rod cap and bearing, and using the scale on
the plastigage bag, measure the plastigage width.
NOTE:
The procedure when the measured value exceeds the limit is
same as that described in the “Method by Calculation”.
MAIN BEARING OIL CLEARANCE
Method by Calculation

Install main bearings to cylinder block and lower cylinder block, and tighten lower cylinder block mounting
bolts to the specified torque. Refer to EM-86, "
ASSEMBLY" for the tightening procedure.

Measure the inner diameter of main bearing with bore gauge.
(Bearing oil clearance) = (Main bearing inner diameter) – (Crank-
shaft main journal diameter)

If the clearance exceeds the limit, select proper main bearing
according to main bearing housing inner diameter and crankshaft main journal diameter to obtain speci-
fied bearing oil clearance. Refer to EM-95, "
HOW TO SELECT MAIN BEARING" .
Method of Using Plastigage

Remove engine oil and dust on crankshaft main journal and the surfaces of each bearing completely.

Cut a plastigage slightly shorter than the bearing width, and place it in crankshaft axial direction, avoiding
oil holes.

Install main bearings to cylinder block and lower cylinder block, and tighten lower cylinder block mounting
bolts to the specified torque. Refer to EM-86, "
ASSEMBLY" for the tightening procedure.
CAUTION:
Do not rotate crankshaft.

Remove lower cylinder block and bearings, and using the scale
on the plastigage bag, measure the plastigage width.
NOTE:
The procedure when the measured value exceeds the limit is
same as that described in the “Method by Calculation”.
PBIC1149E
Standard:
No. 1, 3 and 5 journals
: 0.012 - 0.022 mm (0.0005 - 0.0009 in)
No. 2 and 4 journals
: 0.018 - 0.028 mm (0.0007 - 0.0011 in)
Limit : 0.1 mm (0.004 in)
PBIC2204E
PBIC1149E

CYLINDER BLOCK
EM-107
[QR]
C
D
E
F
G
H
I
J
K
L
MA
EM

MAIN BEARING CRUSH HEIGHT

When lower cylinder block is removed after being tightened to
the specified torque with main bearings installed, the tip end of
bearing must protrude. Refer to EM-86, "
ASSEMBLY" for the
tightening procedure.

If the standard is not met, replace main bearings.
CONNECTING ROD BEARING CRUSH HEIGHT

When connecting rod bearing cap is removed after being tight-
ened to the specified torque with connecting rod bearings
installed, the tip end of bearing must protrude. Refer to EM-86,
"ASSEMBLY" for the tightening procedure.

If the standard is not met, replace connecting rod bearings.
LOWER CYLINDER BLOCK MOUNTING BOLT OUTER DIAMETER

Perform only with M10 bolts.

Measure the outer diameters (“d1 ”, “d2 ”) at two positions as
shown in the figure.

If reduction appears in “A” range, regard it as “d2 ”.

If it exceeds the limit (a large difference in dimensions), replace
lower cylinder block mounting bolt with a new one.
CONNECTING ROD BOLT OUTER DIAMETER

Measure the outer diameter “d” at position as shown in the fig-
ure.

If reduction appears in a position other than “d”, regard it as “d”.

When “d” falls below the limit (when it becomes thinner), replace
connecting rod bolt with a new one.Standard : There must be crush height.
SEM502G
Standard : There must be crush height.
PBIC1646E
Limit (“d1 ” – “d2 ”) : 0.13 mm (0.0051 in)
PBIC0911E
Limit : 7.75 mm (0.3051 in)
PBIC0912E

EM-234
[VQ]
CYLINDER BLOCK

2. Install each plug to cylinder block as shown in the figure.
NOTE:
Water drain plug at the right bank side for VQ35DE is also used
as a connector of water pipe for oil cooler. Refer to LU-23, "
OIL
COOLER (VQ35DE)" .

Apply sealant to the thread of water drain plug “A”.
Use Anaerobic Liquid Gasket or equivalent.

Apply sealant to the thread of water drain plugs “B” and “D”.
Use Genuine Liquid Gasket or equivalent.

Apply sealant to the thread of plug “C”.
Use Thread Locking Sealant or equivalent.

Replace washers with new one.

Tighten each plug as specified below.
3. Install oil jet. (VQ35DE)

Insert oil jet dowel pin into cylinder block dowel pin hole, and
tighten mounting bolts.
4. Install main bearings and thrust bearings as follows:
a. Remove dust, dirt, and engine oil on bearing mating surfaces of cylinder block and main bearing caps.
PBIC2487E
Part WasherTightening torque
VQ23DE VQ35DE
A Yes 62.0 N·m (6.3 kg-m, 46 ft-lb)
B No 9.8 N·m (1.0 kg-m, 87 in-lb)
C Yes 62.0 N·m (6.3 kg-m, 46 ft-lb)
D No 19.6 N·m (2.0 kg-m, 14 ft-lb) 39.2 N·m (4.0 kg-m, 29 ft-lb)
PBIC2488E

CYLINDER BLOCK
EM-249
[VQ]
C
D
E
F
G
H
I
J
K
L
MA
EM


Measure the distortion on the cylinder block upper face at some
different points in six directions with straightedge and feeler
gauge.

If it exceeds the limit, replace cylinder block.
MAIN BEARING HOUSING INNER DIAMETER

Install main bearing caps and main bearing beam (VQ35DE)
without installing main bearings, and tighten main bearing cap
bolts to the specified torque. Refer to EM-233, "
ASSEMBLY"
for the tightening procedure.

Measure the inner diameter of main bearing housing with bore
gauge.

If out of the standard, replace cylinder block and main bearing
caps as assembly.
NOTE:
Cylinder block cannot be replaced as a single part, because it is
machined together with main bearing caps.
PISTON TO CYLINDER BORE CLEARANCE
Cylinder Bore Inner Diameter

Using bore gauge, measure cylinder bore for wear, out-of-round
and taper at six different points on each cylinder. (“X” and “Y”
directions at “A”, “B” and “C”) (“X” is in longitudinal direction of
engine)

If the measured value exceeds the limit, or if there are scratches
and/or seizure on the cylinder inner wall, hone or re-bore the
inner wall.

Oversize piston is provided. When using oversize piston, re-
bore cylinder so that the clearance of the piston-to-cylinder bore
satisfies the standard.
CAUTION:
When using an oversize piston, use over size pistons for all
cylinders with oversize piston rings.Limit : 0.1 mm (0.004 in)
SEM123C
Standard : 63.993 - 64.017 mm (2.5194 - 2.5203 in)
PBIC1643E
Standard inner diameter:
VQ23DE : 85.000 - 85.030 mm (3.3465 - 3.3476 in)
VQ35DE : 95.500 - 95.530 mm (3.7598 - 3.7610 in)
Wear limit : 0.2 mm (0.008 in)
Out-of-round (Difference between “X” and “Y”)
: 0.015 mm (0.0006 in)
Taper limit (Difference between “A” and “C”)
: 0.01 mm (0.0004 in)
Oversize (OS) : 0.2 mm (0.008 in)
PBIC0923E
SEM843E

CYLINDER BLOCK
EM-251
[VQ]
C
D
E
F
G
H
I
J
K
L
MA
EM

CRANKSHAFT PIN JOURNAL DIAMETER

Measure outer diameter of crankshaft pin journal with microme-
ter.

If out of the standard, measure the connecting rod bearing oil
clearance. Then use undersize bearing. Refer to EM-251,
"CONNECTING ROD BEARING OIL CLEARANCE" .
CRANKSHAFT OUT-OF-ROUND AND TAPER

Measure the dimensions at four different points as shown in the
figure on each main journal and pin journal with micrometer.

Out-of-round is indicated by the difference in the dimensions
between “X” and “Y” at “A” and “B”.

Taper is indicated by the difference in the dimensions between
“A” and “B” at “X” and “Y”.

If the measured value exceeds the limit, correct or replace crankshaft.

If corrected, measure the bearing oil clearance of the corrected main journal and/or pin journal. Then
select main bearing and/or connecting rod bearing. Refer to EM-252, "
MAIN BEARING OIL CLEAR-
ANCE" and/or EM-251, "CONNECTING ROD BEARING OIL CLEARANCE" .
CRANKSHAFT RUNOUT

Place V-block on precise flat table, and support the journals on
the both end of crankshaft.

Place dial indicator straight up on the No. 3 journal.

While rotating crankshaft, read the movement of the pointer on
dial indicator. (Total indicator reading)

If it exceeds the limit, replace crankshaft.
CONNECTING ROD BEARING OIL CLEARANCE
Method by Calculation

Install connecting rod bearings to connecting rod and connect-
ing rod bearing cap, and tighten connecting rod nuts (VQ23DE)
or connecting rod bolts (VQ35DE) to the specified torque. Refer
to EM-233, "
ASSEMBLY" for the tightening procedure.

Measure the inner diameter of connecting rod bearing with
inside micrometer.
(Bearing oil clearance) = (Connecting rod bearing inner diameter) –
(Crankshaft pin journal diameter)Standard
VQ23DE : 44.956 - 44.974 mm (1.7699 - 1.7706 in) dia.
VQ35DE : 51.956 - 51.974 mm (2.0455 - 2.0462 in) dia.
PBIC0127E
Limit:
Out-of-round (Difference between “X” and “Y”)
: 0.002 mm (0.0001 in)
Taper (Difference between “A” and “B”)
: 0.002 mm (0.0001 in)
SBIA0535E
Standard : Less than 0.05 mm (0.002 in)
Limit : 0.1 mm (0.004 in)
SEM346D
PBIC1642E

EM-252
[VQ]
CYLINDER BLOCK


If calculated value exceeds the limit, select proper connecting rod bearing according to connecting rod big
end diameter and crankshaft pin journal diameter to obtain the specified bearing oil clearance. Refer to
EM-241, "
HOW TO SELECT CONNECTING ROD BEARING" .
Method of Using Plastigage

Remove oil and dust on crankshaft pin journal and the surfaces of each bearing completely.

Cut plastigage slightly shorter than the bearing width, and place it in crankshaft axial direction, avoiding oil
holes.

Install connecting rod bearings to connecting rod and connecting rod bearing cap, and tighten connecting
rod nuts (VQ23DE) or connecting rod bolts (VQ35DE) to the specified torque. Refer to EM-233, "
ASSEM-
BLY" for the tightening procedure.
CAUTION:
Do not rotate crankshaft.

Remove connecting rod bearing cap and bearing, and using
scale on plastigage bag, measure the plastigage width.
NOTE:
The procedure when the measured value exceeds the limit is
same as that described in the “Method by Calculation”.
MAIN BEARING OIL CLEARANCE
Method by Calculation

Install main bearings to cylinder block and main bearing caps,
and tighten main bearing cap bolts with main bearing beam
(VQ35DE) to the specified torque. Refer to EM-233, "
ASSEM-
BLY" for the tightening procedure.

Measure the inner diameter of main bearing with bore gauge.
(Bearing clearance) = (Main bearing inner diameter) – (Crankshaft
main journal diameter)

If calculated value exceeds the limit, select proper main bearing according to main bearing inner diameter
and crankshaft main journal diameter to obtain the specified bearing oil clearance. Refer to EM-242,
"HOW TO SELECT MAIN BEARING" .
Method of Using Plastigage

Remove oil and dust on crankshaft main journal and the surfaces of each bearing completely.

Cut plastigage slightly shorter than the bearing width, and place it in crankshaft axial direction, avoiding oil
holes.

Install main bearings to cylinder block and main bearing caps, and tighten main bearing bolts with main
bearing beam (VQ35DE) to the specified torque. Refer to EM-233, "
ASSEMBLY" for the tightening pro-
cedure.
CAUTION:
Do not rotate crankshaft.Standard : 0.034 - 0.059 mm (0.0013 - 0.0023 in)
(actual clearance)
Limit : 0.070 mm (0.0028 in)
PBIC1149E
Standard : 0.035 - 0.045 mm (0.0014 - 0.0018 in)
(actual clearance)
Limit : 0.065 mm (0.0026 in)
PBIC1644E