Nissan Titan. Manual - part 325

EM-104

< UNIT DISASSEMBLY AND ASSEMBLY >

ENGINE UNIT

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 large end inside diameter.

Refer to 

EM-93, "Disassembly and Assembly"

.

• If measurement exceeds the standard, replace connecting rod.

CONNECTING ROD BUSHING OIL CLEARANCE (SMALL END)

 Connecting Rod Inside Diameter (Small End)

• Measure inside diameter of bushing using suitable tool.

Piston Pin Diameter

• Measure diameter of piston pin using suitable tool.

Connecting Rod Bushing Oil Clearance (Small End)

(Connecting rod small end oil clearance) = (Inside diameter of con-

necting rod small end) – (Piston pin diameter)

• If measured value exceeds the standard, replace the connecting

rod assembly and/or piston and piston pin assembly.

• If replacing the piston and piston pin assembly, use the Table for

Selective Fitting for Piston to select the piston corresponding to the

applicable bore grade of the cylinder block to be used. Refer to

EM-111, "How to Select Piston and Bearing"

.

Standard

: 57.000 - 57.013 mm (2.2441 - 2.2446 in)

PBIC1641E

Standard

: 22.000 - 22.006 mm (0.8661 - 0.8664 in)

PBIC0120E

Standard

: 21.989 - 21.995 mm (0.8657 - 0.8659 in)

PBIC0117E

Standard

: 0.005 - 0.017 mm (0.0002 - 0.0007 in)

KBIA2536E

ENGINE UNIT

EM-105

< UNIT DISASSEMBLY AND ASSEMBLY >

C

D

E

F

G

H

I

J

K

L

M

A

EM

N

P

O

Factory installed parts grading:

• Only grade 0 is available.

Unit: mm (in)

CYLINDER BLOCK DISTORTION

• Remove any oil, scale, gasket, sealant and carbon deposits from the cylinder block surface.

CAUTION:

Do not allow any debris to enter the oil or coolant passages.

• Measure block upper face for distortion in six directions as shown.

• If measurement exceeds the limit, replace cylinder block.

MAIN BEARING HOUSING INSIDE DIAMETER

• Install the main bearing caps with the main bearings removed, and

tighten the bolts to the specified torque. Refer to 

EM-93, "Disas-

sembly and Assembly"

.

• Measure inside diameter of main bearing housing.

• If out of the standard, replace cylinder block and main bearing

caps as an assembly. 

NOTE:

These components must be replaced as a single unit, because

they were processed together.

PISTON TO CYLINDER BORE CLEARANCE

Cylinder Bore Diameter

• 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″).

NOTE:

When determining cylinder bore grade, measure cylinder bore at 

(B) position.

Grade

0

Connecting rod bushing inside diameter

22.000 - 22.006          

       (0.8661 - 0.8664)

Piston pin diameter

21.989 - 21.995

(0.8657 - 0.8659)

Piston pin hole diameter

21.993 - 21.999

(0.8659 - 0.8661)

KBIA2496E

Standard

: 0.03 mm (0.0012 in)

Limit

: 0.1 mm (0.004 in)

SEM123C

Standard

: 68.944 - 68.968 mm (2.7143 - 2.7153 in)

PBIC1643E

PBIC0123E

EM-106

< UNIT DISASSEMBLY AND ASSEMBLY >

ENGINE UNIT

• If measured value exceeds the repair limit, or if there are scratches and/or seizure on the cylinder inner wall,

hone or bore the inner wall. 

Piston Skirt Diameter

• Measure piston skirt diameter using suitable tool.

• Measure point (H).

Piston to Cylinder Bore Clearance

• Calculate by using diameter of the piston skirt and the cylinder

bore diameter (direction X, position B).

(Clearance) = (Cylinder bore diameter) – (piston skirt diameter)

• If calculation exceeds the limit, replace piston/piston pin assembly.

Reboring Cylinder Bore

1. Cylinder bore size is determined by adding piston-to-bore clearance to piston diameter.

Standard diameter:

98.000 - 98.030 mm (3.8583 - 3.8594 in)

Wear limit:

0.20 mm (0.0079 in)

Out-of-round [Difference between (X) and (Y)]:

Limit: 0.015 mm (0.0006 in)

Taper limit [Difference between (A) and (C)]:

Limit: 0.010 mm (0.0004 in)

PBIC0124E

Standard

: 97. 980 - 98. 010 mm (3.8575 - 3.8587 in)

PBIC0125E

Distance from the top

: 39 mm (1.54 in)

KBIA2545E

Standard

: 0.010 - 0.030 mm (0.0004 - 0.0012 in)

Limit

: 0.08 mm (0.0031 in)

PBIC0123E

Rebored size calculation: D = A +B - C
where,
D: Bored diameter

ENGINE UNIT

EM-107

< UNIT DISASSEMBLY AND ASSEMBLY >

C

D

E

F

G

H

I

J

K

L

M

A

EM

N

P

O

2. Install main bearing caps, and tighten them to the specified torque. Otherwise, cylinder bores may be dis-

torted in final assembly.

3. Cut the 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 one 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-bore clearance.
5. Measure finished cylinder bore for out-of-round and taper.

NOTE:

Measurement should be done after cylinder bore cools down.

CRANKSHAFT JOURNAL DIAMETER

• Measure diameter of crankshaft journals.

• If measurement is out of standard, measure the main bearing oil clearance. Then use the undersize bearing. 

CRANKSHAFT PIN DIAMETER

• Measure diameter of crankshaft pin using suitable tool.

• If measurement is out of standard, measure connecting rod bear-

ing oil clearance. Then use undersize bearing. 

OUT-OF-ROUND AND TAPER OF CRANKSHAFT

• Measure dimensions at four different points as shown on each

journal and pin. 

• Out-of-roundness is indicated by the difference in dimension

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 measured value exceeds the standard, correct or replace crankshaft.

• If corrected, measure the bearing oil clearance of the corrected journal or pin. Then select the main bearing

or connecting rod bearing. 

CRANKSHAFT RUNOUT

A: Piston diameter as measured
B: Piston - to - bore clearance (standard value)
C: Honing allowance 0.02 mm (0.0008 in)

Standard

: 63.940 - 63.964 mm (2.5173 - 2.5183 in)

Standard

: 53.956 - 53.974 mm (2.1243 - 2.1250 in)

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)

PBIC1685E