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Main Bearing Selection Table (No. 2 and 4 journals)
Main Bearing Grade Table (All Journals)
Unit: mm (in)
KBIA0150E
Grade number Thickness Identification color
(UPR / LWR)Remarks
0 1.973 - 1.976 (0.0777 - 0.0778) Black
Grade and color are the same
for upper and lower bearings. 1 1.976 - 1.979 (0.0778 - 0.0779) Brown
2 1.979 - 1.982 (0.0779- 0.0780) Green
3 1.982 - 1.985 (0.0780 - 0.0781) Yellow
4 1.985 - 1.988 (0.0781 - 0.0783) Blue
5 1.988 - 1.991 (0.0783 - 0.0784) Pink
6 1.991 - 1.994 (0.0784 - 0.0785) Purple
7 1.994 - 1.997 (0.0785 - 0.0786) White
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Use Undersize Bearing Usage Guide
●Use undersize (US) bearing when oil clearance with standard size main bearing is not within specification.
●When using undersize (US) b NISSAN X-TRAIL 2001 Service Repair Manual EM-88
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Use Undersize Bearing Usage Guide
●Use undersize (US) bearing when oil clearance with standard size main bearing is not within specification.
●When using undersize (US) b](/manual-img/5/57405/w960_57405-137.png)
EM-88
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Use Undersize Bearing Usage Guide
●Use undersize (US) bearing when oil clearance with standard size main bearing is not within specification.
●When using undersize (US) bearing, measure the bearing inner diameter with bearing installed, and grind
journal until oil clearance falls within specification.
Bearing undersize table
Unit: mm (in)
CAUTION:
Keep fillet R when grinding crankshaft journal in order to use
underseas bearing (All journals).
Inspection After DisassemblyEBS00KNW
CRANKSHAFT END PLAY
●Using dial indicator, measure crankshaft travel amount by mov-
ing the crankshaft forward or backward.
●If the measured value exceeds the limit, replace the thrust bear-
ings, and measure again. If it still exceeds the limit, replace the
crankshaft also.
01UPR 1.973 - 1.976 (0.0777 - 0.0778)
Black / Brown
Grade and color are different
for upper and lower bearings. LWR 1.976 - 1.979 (0.0778 - 0.0779)
12UPR 1.976 - 1.979 (0.0778 - 0.0779)
Brown / Green
LWR 1.979 - 1.982 (0.0779 - 0.0780)
23UPR 1.979 - 1.982 (0.0779- 0.0780)
Green / Yellow
LWR 1.982 - 1.985 (0.0780 - 0.0781)
34UPR 1.982 - 1.985 (0.0780 - 0.0781)
Yellow / Blue
LWR 1.985 - 1.988 (0.0781 - 0.0783)
45UPR 1.985 - 1.988 (0.0781 - 0.0783)
Blue / Pink
LWR 1.988 - 1.991 (0.0783 - 0.0784)
56UPR 1.988 - 1.991 (0.0783 - 0.0784)
Pink / Purple
LWR 1.991 - 1.994 (0.0784 - 0.0785)
67UPR 1.991 - 1.994 (0.0784 - 0.0785)
Purple / White
LWR 1.994 - 1.997 (0.0785 - 0.0786) Grade number Thickness Identification color
(UPR / LWR)Remarks
Size Thickness
US 0.25 (0.0098) 2.106 - 2.114 (0.0829 - 0.0832)
KBIA0148E
Standard : 0.10 - 0.26 mm (0.0039 - 0.0102 in)
Limit : 0.30 mm (0.0118 in)
PBIC0268E
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CONNECTING ROD SIDE CLEARANCE
●Measure side clearance between connecting rod and crankshaft
arm with feeler gauge.
●If the measured value exceed NISSAN X-TRAIL 2001 Service Repair Manual CYLINDER BLOCK
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CONNECTING ROD SIDE CLEARANCE
●Measure side clearance between connecting rod and crankshaft
arm with feeler gauge.
●If the measured value exceed](/manual-img/5/57405/w960_57405-138.png)
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CONNECTING ROD SIDE CLEARANCE
●Measure side clearance between connecting rod and crankshaft
arm with feeler gauge.
●If the measured value exceeds the limit, replace the connecting
rod bearings, and measure again. If it still exceeds the limit,
replace the crankshaft also.
PISTON AND PISTON PIN CLEARANCE
Inner Diameter of Piston Pin
Measure the inner diameter of piston pin bore with an inside
micrometer.
Outer Diameter of Piston Pin
Measure outer diameter of piston pin with a micrometer.
Piston and Piston Pin Clearance
(Piston pin clearance) = (Piston pin bore diameter) – (Outer diameter
of piston pin)
●If clearance exceeds specification, replace either or both of pis-
ton/piston pin assembly and connecting rod assembly with refer-
ence to specification of each parts.
●Refer to piston selection table to replace piston/piston pin
assembly. Refer to EM-83, "
HOW TO SELECT PISTON" .
●Refer to connecting rod bearing selection table to replace con-
necting rod. Refer to EM-83, "
HOW TO SELECT CONNECTING
ROD BEARING" . Standard : 0.20 - 0.35 mm (0.0079 - 0.0138 in)
Limit : 0.50 mm (0.0197 in)
KBIA0071E
Standard: 19.993 - 20.005 mm (0.7871 - 0.7876 in)
PBIC0116E
Standard: 19.989 - 20.001 mm (0.7870 - 0.7874 in)
PBIC0117E
Standard: 0.002 - 0.006 mm (0.0001 - 0.0002 in)
KBIA0259E
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NOTE:
●The connecting rod small end grade and piston pin hole (pis-
ton pin) grade are provided only for the parts installed at the
plant. For service parts, NISSAN X-TRAIL 2001 Service Repair Manual EM-90
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NOTE:
●The connecting rod small end grade and piston pin hole (pis-
ton pin) grade are provided only for the parts installed at the
plant. For service parts,](/manual-img/5/57405/w960_57405-139.png)
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NOTE:
●The connecting rod small end grade and piston pin hole (pis-
ton pin) grade are provided only for the parts installed at the
plant. For service parts, no grades can be selected. (Only 0
grade is available.)
●Refer to EM-91, "CONNECTING ROD BUSHING OIL
CLEARANCE (SMALL END)" for the values for each grade at
the plant.
●Regarding marks on piston head, Refer to EM-83, "HOW TO
SELECT PISTON" .
PISTON RING SIDE CLEARANCE
●Measure side clearance of piston ring and piston ring groove
with feeler gauge.
●If out of specification, replace piston and/or piston ring assembly.
PISTON RING END GAP
●Check if inner diameter of cylinder bore is within specification.
Refer to EM-93, "
PISTON TO CYLINDER BORE CLEARANCE"
.
●Insert piston ring until middle of cylinder with piston, and mea-
sure gap.
●If out of specification, replace piston ring. If gap still exceeds the limit even with a new ring, re-bore cylin-
der and use oversized piston and piston ring.
SBIA0282E
Standard:
Top ring : 0.045 - 0.080 mm (0.0018 - 0.0031 in)
2nd ring : 0.030 - 0.070 mm (0.0012 - 0.0028 in)
Oil ring : 0.065 - 0.135 mm (0.0026 - 0.0053 in)
Limit:
Top ring : 0.11 mm (0.0043 in)
2nd ring : 0.10 mm (0.0039 in)
SEM024AA
Standard:
Top ring : 0.21 - 0.31 mm (0.0083 - 0.0122 in)
2nd ring : 0.32 - 0.47 mm (0.0126 - 0.0185 in)
Oil ring : 0.20 - 0.60 mm (0.0079 - 0.0236 in)
Limit:
Top ring : 0.54 mm (0.0213 in)
2nd ring : 0.67 mm (0.0264 in)
Oil ring : 0.95 mm (0.0374 in)
SEM822B
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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 BEARING (BIG END)
Install the connecting rod cap without the connecting rod bearing
installed. After tightening the connecting rod bolt to the specified
torque, measure the connecting rod big end inner diameter using an
inside micrometer.
CONNECTING ROD BUSHING OIL CLEARANCE (SMALL END)
Inner Diameter of Connecting Rod (Small End)
Measure inner diameter of bushing.Bend
Limit:
0.15 mm (0.0059 in) per 100 mm (3.94 in) length.
To r s i o n
Limit:
0.30 mm (0.0118 in) per 100 mm (3.94 in) length.
SEM003F
SEM038F
Standard: 48.000 - 48.013 mm (1.8898 - 1.8903 in)
PBIC0119E
Standard: 20.000 - 20.012 mm (0.7874 - 0.7879 in)
PBIC0120E
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Outer Diameter of Piston Pin
Measure outer diameter of piston pin.
Connecting Rod Bushing Oil Clearance (Small End)
(Connecting rod small end oil clearance) = (Inner NISSAN X-TRAIL 2001 Service Repair Manual EM-92
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Outer Diameter of Piston Pin
Measure outer diameter of piston pin.
Connecting Rod Bushing Oil Clearance (Small End)
(Connecting rod small end oil clearance) = (Inner](/manual-img/5/57405/w960_57405-141.png)
EM-92
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Outer Diameter of Piston Pin
Measure outer diameter of piston pin.
Connecting Rod Bushing Oil Clearance (Small End)
(Connecting rod small end oil clearance) = (Inner diameter of con-
necting rod small end) – (Outer diameter of piston pin)
●If the measured value exceeds the standard, replace the con-
necting rod assembly and/or piston and piston pin assembly.
●If replacing the piston and piston pin assembly, refer to the “Pis-
ton Selection Table” to select the piston corresponding to the
applicable bore grade of the cylinder block to be used. Refer to
EM-83, "
HOW TO SELECT PISTON" .
Factory installed parts grading:
Service parts apply only to grade 0.
Unit: mm (in)
CYLINDER BLOCK DISTORTION
●Using a scraper, remove gasket on the cylinder block surface,
and also remove engine oil, scale, carbon, or other contamina-
tion.
CAUTION:
Be careful not to allow gasket flakes to enter the engine oil
or engine coolant passages.
●Measure the distortion on the block upper face at some different
points in 6 directions.
●If out of the distortion limit, replace the cylinder block.Standard: 19.989 - 20.001 mm (0.7870 - 0.7874 in)
PBIC0117E
Standard: 0.005 - 0.017 mm (0.0002 - 0.0007 in)
SBIA0282E
Grade 0 1
Connecting rod small end
inner diameter 20.000 - 20 .0 06
(0.7874 - 0.7876) 20.006 - 20.012
(0.7876 - 0.7879)
Piston pin outer diameter 19.989 - 19.995
(0.7870 - 0.7872) 19.995 - 20. 001
(0.7872 - 0.7874)
Piston pin bore diameter 19.993 - 19.999
(0.7871- 0.7874) 19.999 - 20.005
(0.7874 - 0.7876)
KBIA0259E
Limit: 0.1 mm (0.004 in)
PBIC0121E
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INNER DIAMETER OF MAIN BEARING HOUSING
●Install the main bearing caps with the main bearings removed,
and tighten the mounting bolts to t NISSAN X-TRAIL 2001 Service Repair Manual CYLINDER BLOCK
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INNER DIAMETER OF MAIN BEARING HOUSING
●Install the main bearing caps with the main bearings removed,
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INNER DIAMETER OF MAIN BEARING HOUSING
●Install the main bearing caps with the main bearings removed,
and tighten the mounting bolts to the specified torque.
●Using a bore gauge, measure the inner diameter of the main
bearing housing.
●If out of the standard, replace the cylinder block and lower cylin-
der block assembly.
NOTE:
These components cannot be replaced as a single unit because
they were processed together.
PISTON TO CYLINDER BORE CLEARANCE
Inner Diameter of Cylinder Bore
●Using a bore gauge, measure cylinder bore for wear, out-of-
round and taper at 6 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 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.
●An oversize piston is provided. When using an oversize piston, re-bore the cylinder so that the clearance
of the piston cylinder satisfies the standard.
●When using an oversize piston, use it for all cylinders with oversize piston rings.
Outer Diameter of Piston
●Measure piston skirt diameter.
●Measure point (Distance from the top): 42 mm (1.65 in)Standard: 58.944 - 58.967 mm (2.3206 - 2.3215 in)
PBIC0269E
Standard inner diameter:
89.000 - 89.030 mm (3.5039 - 3.5051 in)
Wear limit:
0.2 mm (0.008 in)
Out-of-round (Difference between X and Y):
Less than 0.015 mm (0.0006 in)
Taper limit (Difference between A and C):
Less than 0.01 mm (0.0004 in)
Oversize (OS): 0.2 mm (0.008 in)
SBIA0284E
Standard: 88.980 - 89.010 mm (3.5031 - 3.5043 in)
PBIC0125E
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Piston to Cylinder Bore Clearance
●Calculate by outer diameter of piston skirt and inner diameter of cylinder (direction X, position B).
(Clearance) = (Inner diameter of cy NISSAN X-TRAIL 2001 Service Repair Manual EM-94
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Piston to Cylinder Bore Clearance
●Calculate by outer diameter of piston skirt and inner diameter of cylinder (direction X, position B).
(Clearance) = (Inner diameter of cy](/manual-img/5/57405/w960_57405-143.png)
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Piston to Cylinder Bore Clearance
●Calculate by outer diameter of piston skirt and inner diameter of cylinder (direction X, position B).
(Clearance) = (Inner diameter of cylinder) – (Outer diameter of piston skirt).
●If it exceeds the limit, replace piston/piston pin assembly.
Re-boring Cylinder Bore
1. Cylinder bore size is determined by adding piston-to-bore clearance to piston diameter “A”.
2. Install main bearing caps, and tighten to the specified torque. Otherwise, cylinder bores may be distorted
in final assembly.
3. Cut cylinder bores.
●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 diame-
ter at a time.
4. Hone cylinders to obtain specified piston-to-bore clearance.
5. Measure finished cylinder bore for out-of-round and taper.
●Measurement should be done after cylinder bore cools down.
OUTER DIAMETER OF CRANKSHAFT JOURNAL
Measure outer diameter of crankshaft journals.
OUTER DIAMETER OF CRANKSHAFT PIN
Measure outer diameter of crankshaft pin.
OUT-OF-ROUND AND TAPER OF CRANKSHAFT
●Using a micrometer, measure the dimensions at 4 different
points shown in the figure on each journal and pin.
●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.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 diameter as measured
B: Piston - to - bore clearance (standard value)
C: Honing allowance 0.02 mm (0.0008 in)
Standard: 54.955 - 54.979 mm (2.1636 - 2.1645 in) dia.
Standard: 44.956 - 44.974 mm (1.7699-1.7706 in) dia.
PBIC0270E
Limit:
Out-of-round (X– Y) : Less than 0.005 mm (0.0002 in)
Taper (A – B) : Less than 0.005 mm (0.0002 in)
PBIC0128E