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Nissan Altima L32. Manual - part 636

EM-80

< DISASSEMBLY AND ASSEMBLY >

[QR25DE]

CYLINDER BLOCK

3. Install the main bearings and the thrust bearings.
a. Remove dust, dirt, and oil from the bearing mating surfaces of

the cylinder block and lower cylinder block.

b. Install the thrust bearings to both sides of the No. 3 main bearing

journal on the cylinder block.

• Install the thrust bearings with the oil groove facing the crank-

shaft arm (outside).

Install the main bearings paying attention to their position and

direction.

• The main bearing with an oil hole and groove goes on the cyl-

inder block side (A). The one without them goes on the lower

cylinder block side (B).

• Only the main bearing (on the cylinder block side) for No. 3

journal (6) has different specifications.

• Before installing the bearings, apply engine oil to the bearing

friction surface (inside). Do not apply oil to the back surface,

but thoroughly clean it.

• When installing, align the bearing stopper (1), (5) to the notch.

• Make sure that the oil holes on the cylinder block and those on

the corresponding bearing (2), (4) are aligned.

(3) : Journal other than No. 3

(7) : Thrust bearings

4. Install the signal plate to the crankshaft.
a. Position the crankshaft and signal plate using a positioning

dowel pin, and tighten the bolts to specification.

b. Remove the dowel pin.

CAUTION:

Be sure to remove dowel pin before installing the crank-

shaft.

NOTE:

Dowel pins for the crankshaft and signal plate are supplied as a

set for each.

5. Install the crankshaft onto the cylinder block.

• While turning the crankshaft by hand, check that it turns

smoothly.

6. Install the lower cylinder block.

• Apply Silicone RTV Sealant to positions as shown.

• Use Genuine Silicone RTV Sealant, or equivalent. Refer to

GI-

CAUTION:

After the Silicone RTV Sealant is applied, the lower cylinder

block installation must be finished within 5 minutes.

NOTE:

Cylinder block and lower cylinder block are machined together. Neither of them can be replaced sepa-

rately.

PBIC0264E

AWBIA0186ZZ

Dimension A

: 3.5 - 4.5 mm (0.138 - 0.177 in)

Dimension B

: Apply to end

ALBIA0208ZZ

AWBIA0040ZZ

CYLINDER BLOCK

EM-81

< DISASSEMBLY AND ASSEMBLY >

[QR25DE]

7. Tighten lower cylinder block bolts in the numerical order as

shown and according to the following steps:

CAUTION:

Check tightening angle. Do not make judgment by visual

inspection.

a. Apply new engine oil to threads and seat surfaces of the bolts.

b. Tighten bolts No. 11 - 22 only in the order as shown, to specifica-

tion below.

c. Tighten bolts No. 1 - 10 only in the order as shown, to specifica-

tion below.

d. Tighten bolts No. 1 - 10 only in the order as shown, to specifica-

tion below.

• Wipe off completely any protruding Silicone RTV Sealant on rear oil seal installation surface and the

exterior of engine.

• Check crankshaft side clearance. Refer to

EM-83, "Inspection After Disassembly"

• After installing the bolts, make sure that the crankshaft can be rotated smoothly by hand.

8. Install the rear oil seal.

• Press the oil seal between cylinder block and crankshaft with a

suitable drift.

• Be careful not to touch the grease on the oil seal lip.

• Be careful not to cause scratches or burrs when pressing in

the rear oil seal.

• Press in rear oil seal to the position as shown.

9. Install the piston to the connecting rod. Assemble the components in their original positions.
a. Using a snap ring pliers, install the snap ring to the grooves of the piston's rear side.

• Insert the piston pin snap ring fully into groove.

Tool number

: KV 10112100 (BT-8653-A)

WBIA0484E

Step 1, bolts 11 - 22 only

: 25.1 N·m (2.6 kg-m, 19 ft-lb)

Step 2, bolts 1 - 10 only

: 39.2 N·m (4.0 kg-m, 29 ft-lb)

Step 3, bolts 1 - 10 only

: 60

°degrees rotation

KBIA0063E

SBIA0280E

SBIA0281E

EM-82

< DISASSEMBLY AND ASSEMBLY >

[QR25DE]

CYLINDER BLOCK

b. Install the piston to the connecting rod.

• Using a heat gun, heat the piston [approximately 60

° - 70 C° (140° - 158 °F)] until the piston pin can be

pushed in by hand without excessive force. From the front to the rear, insert the piston pin into the piston

and the connecting rod.

• Assemble so that the front mark on the piston crown and the

oil holes and the cylinder No. on the connecting rod are posi-

tioned as shown.

Install the piston pin snap ring into the front of the piston.

• Check that the connecting rod moves smoothly.

10. Using a piston ring expander, install the piston rings. Assemble

the components in their original positions.

CAUTION:

Be careful not to damage the piston.

• Position each ring with the gap as shown, referencing the pis-

ton front mark as the starting point.

• Install the top ring and the second ring with the stamped sur-

face facing upward.

11. Install the connecting rod bearings to the connecting rod and the

connecting rod cap. Assemble the components in their original

positions.

• When installing the connecting rod bearings, apply engine oil

to the bearing friction surface (inside). Do not apply oil to the

back surface, but thoroughly clean the back.

• When installing, align the connecting rod bearing stopper pro-

trusion with the notch of the connecting rod to install.

• Check the oil holes on the connecting rod and those on the

corresponding bearing are aligned.

12. Install the piston and connecting rod assembly using Tool.

Assemble the components in their original positions.

• Rotate the crankshaft so the pin corresponding to the connect-

ing rod to be installed is at the bottom dead center position.

• Apply engine oil sufficiently to the cylinder bore, piston, and

crankshaft pin.

• Match the cylinder position number with the cylinder No. on

the connecting rod for installation.

• Install the piston with the front mark on the piston crown facing

the front of the engine using Tool.

CAUTION:

Be careful not to damage the crankshaft pin, resulting from an interference of the connecting rod

big end.

PBIC0099E

Stamped mark

: 1K (top ring)
: 2K (second ring)

PBIC0100E

PBIC0266E

Tool number

: EM03470000 (J-8037)

WBIA0485E

CYLINDER BLOCK

EM-83

< DISASSEMBLY AND ASSEMBLY >

[QR25DE]

13. Install the connecting rod caps. Assemble the components in

their original positions.

• Match the stamped cylinder number marks on the connecting

rod with those on the cap to install.

14. Tighten the connecting rod bolts using Tool as follows:

Apply engine oil to the threads and seats of the connecting rod

bolts.

CAUTION:

Check tightening angle. Do not make judgment by visual

inspection.

• Check the connecting rod side clearance. Refer to

EM-83, "Inspection After Disassembly"

• After tightening the bolts, make sure that the crankshaft rotates smoothly.

15. Install flywheel (M/T Models), or drive plate (CVT Models).

• Install drive plate, reinforcement plate and pilot converter as

shown.

• Using a drift with 33 mm (1.30 in) diameter, push pilot con-

verter into the end of the crankshaft.

16. Install the knock sensor.

• Make sure that there is no foreign material on the cylinder

block mating surface and the back surface of the knock sen-

sor.

• Install the knock sensor with the connector facing lower left by

° as shown.

• Do not tighten the bolts while holding the connector.

• Make sure that the knock sensor does not interfere with other

parts.

CAUTION:

If the knock sensor is dropped, replace it with new one.

17. Install the crankshaft position sensor (POS).
18. Installation of remaining components is in the reverse order of removal.

Inspection After Disassembly

INFOID:0000000004202135

CRANKSHAFT SIDE CLEARANCE

SBIA0282E

Tool number

: KV10112100 (BT-8653-A)

Step 1

: 29.4 N·m (3.0 kg-m, 22 ft-lb)

Step 2

: 0 N·m

Step 3

: 19.6 N·m (2.0 kg-m, 14 lb-ft)

Step 4

: Rotate bolts 90

° + 0.5°

WBIA0163E

KBIA0075E

PBIC3020E

Content .. 634 635 636 637 ..