Nissan Pathfinder (2007 year). Manual - part 246

CYLINDER BLOCK

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CONNECTING ROD BEND AND TORSION

●

Check with connecting rod aligner.

●

If it exceeds the limit, replace connecting rod assembly.

CONNECTING ROD BIG END DIAMETER

●

Install connecting rod bearing cap without installing connecting
rod bearing, and tightening connecting rod bolts to the specified
torque. Refer to 

EM-112, "ASSEMBLY"

  for the tightening proce-

dure.

●

Measure the inner diameter of connecting rod big end with
inside micrometer.

●

If out of the standard, replace connecting rod assembly.

CONNECTING ROD BUSHING OIL CLEARANCE
Connecting Rod Bushing Inner Diameter

Measure the inner diameter of connecting rod bushing with inside
micrometer.

Bend:

Limit: 0.15 mm (0.0059 in) per 100 mm (3.94 in) length

Torsion:

Limit: 0.30 mm (0.0118 in) per 100 mm (3.94 in) length

PBIC2077E

Standard

: 57.000 - 57.013 mm (2.2441 - 2.2446 in)

PBIC1641E

Standard

: 22.000 - 22.012 mm (0.8661 - 0.8666 in)

PBIC0120E

EM-126

CYLINDER BLOCK

2007 Pathfinder

Piston Pin Outer Diameter

Measure the outer diameter of piston pin with micrometer.

Connecting Rod Bushing Oil Clearance

(Connecting rod bushing oil clearance) = (Connecting rod bushing inner diameter) – (Piston pin outer diame-
ter)

●

If the calculated value exceeds the limit, replace connecting rod assembly and/or piston and piston pin
assembly.

●

If replacing piston and piston pin assembly, refer to 

EM-118, "HOW TO SELECT PISTON"

 .

●

If replacing connecting rod assembly, refer to 

EM-129, "CON-

NECTING ROD BEARING OIL CLEARANCE"

  to select the

connecting rod bearing.

Factory installed parts grading:

●

Service parts apply only to grade “0”.

Unit: mm (in)

*: After installing in connecting rod

CYLINDER BLOCK DISTORTION

●

Using scraper, remove gasket on the cylinder block surface, and also remove engine oil, scale, carbon, or
other contamination. 

CAUTION:

Be careful not to allow gasket flakes to enter engine oil or engine coolant passages.

Standard

: 21.989 - 22.001 mm (0.8657 - 0.8662 in)

PBIC0117E

Standard

: 0.005 - 0.017 mm (0.0002 - 0.0007 in)

Limit

: 0.030 mm (0.0012 in)

PBIC0809E

               Grade

                    0

                    1

Connecting rod bushing 
inner diameter *

         22.000 - 22.006          
       (0.8661 - 0.8664)

         22.006 - 22.012
        (0.8664 - 0.8666)

Piston pin hole diameter

        21.993 - 21.999
       (0.8659 - 0.8661)

         21.999 - 22. 005
        (0.8661 - 0.8663)

Piston pin outer diameter

        21.989 - 21.995
       (0.8657- 0.8659)

         21.995 - 22.001
        (0.8659 - 0.8662)

PBIC2950E

CYLINDER BLOCK

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●

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 lower cylinder block without installing main bearings, and
tighten lower cylinder block bolts to the specified torque. Refer
to 

EM-112, "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 as assembly.

NOTE:
Cylinder block cannot be replaced as a single part, because it is
machined together with lower cylinder block.

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 oversize piston, use oversize pistons for all
cylinders with oversize piston rings.

Limit

: 0.1 mm (0.004 in)

SEM123C

Standard

: 74.993 - 75.017 mm (2.9525 - 2.9534 in)

PBIC2012E

Standard inner diameter:

95.500 - 95.530 mm (3.7598 - 3.7610 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)

PBIC2955E

SEM843E

EM-128

CYLINDER BLOCK

2007 Pathfinder

Piston Skirt Diameter

Measure the outer diameter of piston skirt with micrometer.

Piston to Cylinder Bore Clearance

Calculate by piston skirt diameter and cylinder bore inner diameter (direction “X”, position “B”).
(Clearance) = (Cylinder bore inner diameter) – (Piston skirt diameter).

●

If the calculated value exceeds the limit, replace piston and piston pin assembly. Refer to 

EM-118, "HOW

TO SELECT PISTON"

 .

Re-boring Cylinder Bore

1.

Cylinder bore size is determined by adding piston to cylinder bore clearance to piston skirt diameter.

2.

Install lower cylinder block, and tighten to the specified torque. Otherwise, cylinder bores may be distorted
in final assembly.

3.

Cut cylinder bores.

NOTE:

●

When any cylinder needs boring, all other cylinders must also be bored.

●

Do not cut too much out of cylinder bore at a time. Cut only 0.05 mm (0.0020 in) or so in diameter at a
time.

4.

Hone cylinders to obtain the specified piston to cylinder bore clearance.

5.

Measure finished the cylinder bore for out-of-round and taper.

NOTE:
Measurement should be done after cylinder bore cools down.

CRANKSHAFT MAIN JOURNAL DIAMETER

●

Measure the outer diameter of crankshaft main journals with micrometer.

●

If out of the standard, measure the main bearing oil clearance. Then use undersize bearing. Refer to 

EM-

130, "MAIN BEARING OIL CLEARANCE"

 .

Measure point

: Distance from the top 43.03 mm (1.6941 in)

Standard

: 95.480 - 95.510 mm (3.7590 - 3.7602 in)

PBIC2956E

Standard

: 0.010 - 0.030 mm (0.0004 - 0.0012 in)

Limit

: 0.08 mm (0.0031 in)

Re-bored size calculation: D = A + B – C

where,

D: Bored diameter

A: Piston skirt diameter as measured

B: Piston to cylinder bore clearance (standard value)

C: Honing allowance 0.02 mm (0.0008 in)

Standard

: 69.951 - 69.975 mm (2.7540 - 2.7549 in) dia.

CYLINDER BLOCK

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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-129,

"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 the main bearing and/or connecting rod bearing. Refer to 

EM-130, "MAIN BEARING OIL CLEAR-

ANCE"

  and/or 

EM-129, "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 cap, and
tighten connecting rod bolts to the specified torque. Refer to 

EM-

112, "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

: 53.956 - 53.974 mm (2.1242 - 2.1250 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

: 0.10 mm (0.0039 in)

SEM346D

Standard

: 0.034 - 0.059 mm (0.0013 - 0.0023 in) 

(actual clearance)

Limit

: 0.070 mm (0.0028 in)

PBIC1642E

EM-130

CYLINDER BLOCK

2007 Pathfinder

●

If the 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-119, "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 cap, and tighten connecting rod bolts to the speci-
fied torque. Refer to 

EM-112, "ASSEMBLY"

  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 lower cylinder block,
and tighten lower cylinder block bolts to the specified torque.
Refer to 

EM-112, "ASSEMBLY"

  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 the calculated value exceeds the limit, select proper main
bearing according to main bearing inner diameter and crankshaft main journal diameter to obtain specified
bearing oil clearance. Refer to 

EM-120, "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 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 bolts to
the specified torque. Refer to 

EM-112, "ASSEMBLY"

  for the tightening procedure.

CAUTION:

Do not rotate crankshaft.

PBIC1149E

Standard

: 0.035 - 0.045 mm (0.0014 - 0.0018 in) 

(actual clearance)

Limit

: 0.065 mm (0.0026 in)

PBIC2204E

CYLINDER BLOCK

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●

Remove lower cylinder block and bearings, 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”.

CRUSH HEIGHT OF MAIN BEARING

●

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-112, "ASSEMBLY"

  for the

tightening procedure.

●

If the standard is not met, replace main bearings.

CRUSH HEIGHT OF CONNECTING ROD BEARING

●

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-112,

"ASSEMBLY"

  for the tightening procedure.

●

If the standard is not met, replace connecting rod bearings.

LOWER CYLINDER BLOCK BOLT OUTER DIAMETER

●

Measure the outer diameters (“d

1

 ”, “d

2

 ”) at two positions as

shown.

●

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

2

 ”.

●

If it exceeds the limit (large difference in dimensions), replace
lower cylinder block bolt with new one.

PBIC1149E

Standard

: There must be crush height.

SEM502G

Standard

: There must be crush height.

PBIC1646E

Limit (“d

1

 ” – “d

2

 ”)

: 0.11 mm (0.0051 in)

PBIC0911E

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CYLINDER BLOCK

2007 Pathfinder

CONNECTING ROD BOLT OUTER DIAMETER

●

Measure the outer diameter “d” at position shown.

●

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

●

When “d” exceeds the limit (when it becomes thinner), replace
connecting rod bolt with new one.

DRIVE PLATE 

●

Check drive plate and signal plate for deformation or cracks.

CAUTION:

●

Do not disassemble drive plate.

●

Do not place drive plate with signal plate facing down.

●

When handling signal plate, take care not to damage or
scratch it. 

●

Handle signal plate in a manner that prevents it from
becoming magnetized.

●

If anything is found, replace drive plate.

OIL JET

●

Check nozzle for deformation and damage.

●

Blow compressed air from nozzle, and check for clogs.

●

If it is not satisfied, clean or replace oil jet.

OIL JET RELIEF VALVE

●

Using clean plastic stick, press check valve in oil jet relief valve.
Make sure that valve moves smoothly with proper reaction
force.

●

If it is not satisfied, replace oil jet relief valve.

Limit

: 7.75 mm (0.3051 in)

PBIC0912E

PBIC2938E

EMU0468D