Nissan Altima L32. Instruction — part 670

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CYLINDER BLOCK

Inspection

INFOID:0000000004202183

PISTON AND PISTON PIN CLEARANCE

Inner Diameter of Piston Pin Hole

• Measure the inner diameter of piston pin hole (dp).

Outer Diameter of Piston Pin

• Measure outer diameter of piston pin (Dp).

•

: Front

• Piston Grade No. (A)

• Piston front mark (B)

• Oil hole (C)

• Connecting rod front mark (D)

• Cylinder No. (E)

• Pin Grade No. (F)

Piston and Piston Pin Interference Fit

Standard Interference Fit = (Dp) – (dp)

• If clearance is exceeds specification, replace either or both of piston/piston pin assembly and connecting rod

assembly with reference to specification of each part.

PISTON RING SIDE CLEARANCE

Standard diameter (dp)
Grade No. 0

: 21.993 – 21.999 mm (0.8659 – 0.8661 in)

Grade No. 1

: 21.999 – 22.005 mm (0.8661 – 0.8663 in)

AEM023

Standard diameter (Dp)
Grade No. 0

: 21.989 – 21.995 mm (0.8657 – 0.8659 in)

Grade No. 1

: 21.995 – 22.001 mm (0.8659 – 0.8662 in)

AEM024

AWBIA0027ZZ

Standard

: 0.002 – 0.010 mm (0.0001 – 0.0004 in)

CYLINDER BLOCK

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• Measure side clearance of piston ring and piston ring groove with

feeler gauge.

• If out of specification, replace piston ring assembly. If clearance exceeds maximum limit with new rings,

replace piston

PISTON RING END GAP

• Insert piston ring until it is in the middle of the cylinder bore and

measure the end gap.

• If out of specification, replace piston ring.

CONNECTING ROD BEND AND TORSION

• If it exceeds the limit, replace connecting rod assembly.

Standard Side Clearance
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

: 0.045 - 0.125 mm (0.0018 - 0.0049 in)

Maximum Limit
Top ring

: 0.11 mm (0.0043 in)

2nd ring

: 0.1 mm (0.004 in)

Oil ring

: —

SEM024AA

Standard
Top ring

: 0.23 - 0.33 mm (0.0091 - 0.0130 in)

2nd ring

: 0.23 - 0.33 mm (0.0091 - 0.0130 in)

Oil ring

: 0.20 - 0.45 mm (0.0079 - 0.0177 in)

Limit:
Top ring

: 0.54 mm (0.0213 in)

2nd ring

: 0.80 mm (0.0315 in)

Oil ring

: 0.95 mm (0.0374 in)

SEM599A

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

SEM038F

SEM003F

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CYLINDER BLOCK

CONNECTING ROD BEARING HOUSING DIAMETER (BIG END)

• Install the connecting rod cap without the connecting rod bearing

installed. After tightening the connecting rod nut to the specified

torque, measure the connecting rod bearing housing 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 piston pin bushing.

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 connect-

ing 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. Follow the

"PISTON-TO-CYLINDER BORE CLEARANCE" procedure.

Factory installed parts grading:

Standard

: 55.000 - 55.013 mm (2.1654 - 2.1659 in)

PBIC0119E

Standard

Grade No. 0
: 22.000 - 22.006 mm (0.8661 - 0.8664 in)
Grade No. 1
: 22.006 - 22.012 mm (0.8664 - 0.8666 in)

PBIC0120E

Standard

Grade No. 0
: 21.989 - 21.995 mm (0.8657 - 0.8659 in)
Grade No. 1
: 21.995 - 22.001 mm (0.8659 - 0.8662 in)

PBIC0117E

Standard

: 0.005 - 0.017 mm (0.0002 - 0.0007 in)

Limit

: 0.030 mm (0.0012 in)

SEM457G

CYLINDER BLOCK

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⇐: Front

• Piston Grade No. (A)

• Piston front mark (B)

• Oil hole (C)

• Connecting rod front mark (D)

• Cylinder No. (E)

• Pin Grade No. (F)

Service parts apply only to grade 0.

Unit: mm (in)

CYLINDER BLOCK DISTORTION

• Using a scraper, remove any old gasket material on the cylinder

block surface, and remove any oil, scale, carbon, or other contami-

nation.

CAUTION:

Be careful not to allow gasket flakes to enter the oil or coolant

passages.

• Measure the distortion on the block upper face at different points in

six directions.

• If out of specification, resurface the cylinder block. The allowable

amount of resurfacing is dependent on the amount of any cylinder

head resurfacing. The resurfacing limit is [amount of cylinder head resurfacing] + [amount of cylinder head

resurfacing] = 0.2 mm (0.008 in).

INNER DIAMETER OF MAIN BEARING HOUSING

• Install the main bearing caps with the main bearings removed, and tighten the bolts to the specified torque.

• Using a bore gauge, measure the inner diameter of the main bear-

ing housing (A).

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

caps as an assembly.

NOTE:

These components cannot be replaced as a single unit, because

they were processed together.

PISTON-TO-CYLINDER BORE CLEARANCE

1. Using a bore gauge, measure cylinder bore for wear, out-of-round and taper at (A), (B) and (C). The X axis

is in the longitudinal direction of the engine.

AWBIA0027ZZ

Grade

0

1

Connecting rod small end inner diameter

22.000 - 22.006

(0.8661 - 0.8664)

22.006 - 22.012

(0.8664 - 0.8666)

Piston pin outer diameter

21.989 - 21.995

(0.8657 - 0.8659)

21.995 - 22. 001

(0.8659 - 0.8662)

Piston pin hole diameter

21.993 - 21.999

(0.8659 - 0.8661)

21.999 - 22.005

(0.8661 - 0.8663)

Distortion limit

: 0.10 mm (0.0039 in)

Cylinder block height

: 214.95 - 215.05 mm
(8.4626 - 8.4665 in)

SEM123C

Standard

: 63.993 - 64.017 mm (2.5194 - 2.5203 in)

SEM845E