Nissan Sentra manuals

Nissan Sentra Service Manual: Cylinder block

Exploded View


  1. Cylinder block
  2. Block heater (for Canada)
  3. Top ring
  4. Second ring
  5. Oil ring
  6. Piston
  7. Piston pin
  8. Snap ring
  9. Connecting rod
  10. Connecting rod bearing (upper)
  11. Connecting rod bearing (lower)
  12. Crankshaft key
  13. Connecting rod cap
  14. Connecting rod cap bolt
  15. Main bearing cap bolt
  16. Main bearing cap
  17. Main bearing (lower)
  18. Crankshaft
  19. Signal plate
  20. Rear oil seal
  21. Main bearing (upper)
  22. Thrust bearing
  23. Oil temperature sensor
  24. Oil pressure sensor
  25. Knock sensor
  1. Refer to INSTALLATION

Disassembly and Assembly

  1. Remove engine and transaxle assembly from the vehicle. Refer to EM-82, "M/T : Exploded View" (M/T) or EM-86, "CVT : Exploded View" (CVT).
  2. Remove the clutch cover and clutch. Refer to CL-17, "Exploded View".
  3. Remove the flywheel or drive plate. Refer to EM-90, "Exploded View" (M/T) or EM-92, "Exploded View" (CVT).
  4. Remove pilot converter using Tool.

Tool Number : ST16610001 (J-23907)


  1. Remove the rear oil seal. Refer to EM-70, "REAR OIL SEAL : Removal and Installation".

CAUTION:

Do not damage the crankshaft or cylinder block when removing the rear oil seal.

  1. Install engine to engine stand with the following procedure:
  1. Remove flywheel or drive plate. Refer to EM-90, "Exploded View" (M/T models) or EM-92, "Exploded View" (CVT models).
  2. Remove pilot converter. Refer to EM-92, "Exploded View" (CVT models).
  3. Lift the engine with a hoist to install it onto widely use engine stand.

CAUTION:

NOTE:

The illustration shows an example of widely used engine stand (A) that can support mating surface of transaxle with flywheel (M/T models) or drive plate (CVT models) removed.

CAUTION:

Before removing the hanging chains, check the engine stand is stable and there is no risk of overturning.


  1. Drain engine oil. Refer to LU-8, "Draining".

CAUTION:

Be sure to clean drain plug and install with new drain plug washer.

  1. Drain fluids and lubricants by removing drain plugs (1, 3 and 4) the cylinder block.

Use Genuine Silicone RTV Sealant, or equivalent. Refer to


Use Genuine Silicone RTV Sealant, or equivalent. Refer to GI-21, "Recommended Chemical Products and Sealants".

  1. Remove the engine harness.
  2. Remove the oil pan (upper). Refer to EM-33, "Exploded View".
  3. Remove the water pump. Refer to CO-19, "Exploded View".
  4. Remove thermostat housing. Refer to CO-21, "Exploded View".
  5. Remove the water outlet. Refer to CO-24, "Exploded View".
  6. Remove the cylinder head. Refer to EM-72, "Exploded View".
  7. Remove knock sensor (2).

CAUTION:

Carefully handle sensor avoiding shocks.

  1. Remove the oil pressure (3) and oil temp sensor (4).

CAUTION:

Do not reuse O-ring.


  1. Remove piston and connecting rod assembly with the following procedure:
  1. Position crankshaft pin corresponding to connecting rod to be removed onto the bottom dead center.
  2. Remove connecting rod cap. Number connecting rod caps so they can be assembled in the same position and direction.
  3. Using a hammer handle or similar tool, push piston and connecting rod assembly out to the cylinder head side.

CAUTION:


  1. Remove connecting rod bearings.

CAUTION:

When removing them, note the installation position. Keep them in the correct order.

  1. Remove piston rings from piston.

CAUTION:


  1. Remove piston from connecting rod with the following procedure:
  1. Using snap ring pliers (A), remove snap rings.


  1. Heat piston to 60 to 70В°C (140 to 158В°F) with a heat gun (A).


  1. Push out piston pin using a punch of outer diameter approximately 18 mm (0.71 in).


  1. Remove main bearing cap bolts.


  1. Remove main bearing caps.

CAUTION:

Do not damage the mounting surface.

  1. Remove crankshaft.

CAUTION:


  1. Remove main bearings and thrust bearings from cylinder block and main bearing caps.

CAUTION:

When removing them, note the installation position. Keep them in the correct order.

ASSEMBLY

CAUTION:

Do not reuse washers.

  1. Fully air-blow engine coolant and engine oil passages in cylinder block, cylinder bore and crankcase to remove any foreign material.

CAUTION:

Use goggles to protect your eyes.

  1. Install each plug to cylinder block as shown.

(2) : Washer

NOTE:

Do not apply liquid gasket or high strength thread locking sealant to the plug (3).



  1. Install main bearings and thrust bearings with the following procedure:
  1. Remove dust, dirt, and engine oil on the bearing mating surfaces of cylinder block and main bearing cap.
  2. Install thrust bearings to both sides of the No. 3 journal housing (B) on cylinder block.


  1. Install the main bearings paying attention to the direction.

(2) : Cylinder block

(4) : Main bearing cap



  1. Install signal plate to crankshaft if removed.
  1. Set the signal plate with the flange facing toward the counter weight side (engine front side) to the crankshaft rear surface.
  2. Apply new engine oil to threads and seat surfaces of bolts.
  3. Position crankshaft (2) and signal plate (1) using a dowel pin, and tighten bolts in numerical order as shown.

(A) : Dowel pin hole

NOTE:


NOTE:

Dowel pin of crankshaft and signal plate is provided as a set for each.

  1. Remove dowel pin.

CAUTION:

Be sure to remove dowel pin.

  1. Install crankshaft to cylinder block.
  1. Install main bearing caps with the following procedure:
  1. Install main bearing caps referring to the journal No. stamp (A) and front mark (B) as shown.

NOTE:

Main bearing cap cannot be replaced as a single part, because it is machined together with cylinder block.


  1. Tighten main bearing cap bolts in numerical order as shown.

CAUTION:


CAUTION:

Confirm the tightening angle by using Tool (A). Do not judge by visual inspection without the tool.

Step 1 : 34.3 NВ·m (3.5 kg-m, 25 ft-lb)

Step 2 : 60В° clockwise in numerical order

Tool number : KV10112100 (BT-8653-A)


  1. Install piston to connecting rod with the following procedure:
  1. Using snap ring pliers, install new snap ring to the groove of the piston rear side.
  1. Assemble piston to connecting rod.

(C) : Engine type

(E) : Large end hole diameter grade

(F) : Front mark (connecting rod)


  1. Install new snap ring to the groove of the piston front side.

CAUTION:

Do not reuse snap rings.

  1. Using a suitable tool, install piston rings.

CAUTION:

(A) : Oil ring upper or lower rail gap

(B) : Front mark

(C) : Second ring and oil ring spacer gap

(D) : Top ring gap

(E) : Stamped mark

CAUTION:


CAUTION:

Do not contact the rail end gap under the oil ring with the oil drain cast groove of piston.

  1. Install connecting rod bearing upper (2) and lower (3) to connecting rod (4) and connecting rod cap (4).

(C) : Oil hole (connecting rod)

(D) : View D

(E) : OK

(F) : NG

(g) : 2.55 - 2.95 mm (0.1004 - 0.1161 in)


NOTE:

  1. Install piston and connecting rod assembly to crankshaft.

(A) : Front mark (piston)

(B) : Oil hole

(C) : Engine type

(E) : Large end hole diameter grade

(F) : Front mark (connecting rod)


CAUTION:

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

Tool number : EM03470000 (J-8037)


  1. Install connecting rod cap.

(A) : Front mark (piston)


(A) : Front mark (piston)

(B) : Oil hole

(C) : Engine type

(E) : Large end hole diameter grade

(F) : Front mark (connecting rod)

  1. Tighten connecting rod cap bolt using Tool (A) as follows: Apply new engine oil to the threads and seats of connecting rod cap bolts.

Tool number : KV10112100 (BT-8653-A)

CAUTION:

Step 1 : 19.6 NВ·m (2.0 kg-m, 14 ft-lb)

Step 2 : 65В° clockwise

CAUTION:


CAUTION:

Check and confirm the tightening angle by using Tool. Do not judge by visual inspection without the tool.

Tool number : KV10112100 (BT-8653-A)


  1. Install oil pan (upper). Refer to EM-33, "Exploded View".
  2. Install rear oil seal. Refer to EM-70, "REAR OIL SEAL : Removal and Installation".
  3. Install flywheel or drive plate. Refer to EM-90, "Removal and Installation" (M/T) or EM-92, "Removal and Installation" (CVT).
  4. Install knock sensor.

(A) : Cylinder block left side

CAUTION:


CAUTION:

NOTE:

  1. Assembly is in the reverse order of disassembly.

Inspection

CRANKSHAFT END PLAY

Standard and Limit : Refer to EM-123, "Cylinder Block".

Connecting rod side clearance


Connecting rod side clearance

Standard and Limit : Refer to EM-123, "Cylinder Block".

Piston to piston pin oil clearance


Piston to piston pin oil clearance

Piston Pin Hole Diameter

Measure the inner diameter of piston pin hole using suitable tool (A).

Standard : Refer to EM-123, "Cylinder Block".

Piston Pin Outer Diameter


Piston Pin Outer Diameter

Measure the outer diameter of piston pin using suitable tool (A).

Standard : Refer to EM-123, "Cylinder Block".

Piston to Piston Pin Oil Clearance


Piston to Piston Pin Oil Clearance

(Piston to piston pin oil clearance) = (Piston pin hole diameter) – (Piston pin outer diameter)

Standard : Refer to EM-123, "Cylinder Block".

NOTE:

Piston ring side clearance

Standard and Limit : Refer to EM-123, "Cylinder Block".

Piston ring end Gap


Piston ring end Gap

Standard and Limit : Refer to EM-123, "Cylinder Block".

Connecting rod bend and torsion


Connecting rod bend and torsion

(A) : Bend

(B) : Torsion

(C) : Feeler gauge

Limit : Refer to EM-123, "Cylinder Block".


Connecting rod big end diameter

(2) : Connecting rod

(A) : Example

(B) : Measuring direction of inner diameter

Standard : Refer to EM-123, "Cylinder Block".

Connecting rod bushing oil clearance


Connecting rod bushing oil clearance

Connecting Rod Bushing Inner Diameter

Measure the inner diameter of connecting rod bushing using suitable tool (A).

Standard : Refer to EM-123, "Cylinder Block".

Piston Pin Outer Diameter


Piston Pin Outer Diameter

Measure the outer diameter of piston pin using suitable tool (A).

Standard : Refer to EM-123, "Cylinder Block".

Connecting Rod Bushing Oil Clearance


Connecting Rod Bushing Oil Clearance

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

Standard and Limit : Refer to EM-123, "Cylinder Block".

Cylinder block top surface distortion

Using a 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.

Limit : Refer to EM-123, "Cylinder Block".

If it exceeds the limit, replace cylinder block.

Main bearing housing inner diameter


Main bearing housing inner diameter

(1) : Cylinder block

(2) : Main bearing cap

Standard : Refer to EM-123, "Cylinder Block".


Standard : Refer to EM-123, "Cylinder Block".

NOTE:

Main bearing cap cannot be replaced as a single part, because it is machined together with cylinder block

Piston to cylinder bore clearance

Cylinder Bore Inner Diameter

(f) : 10 mm (0.39 in)

(g) : 60 mm (2.36 in)

(h) : 130 mm (5.12 in)

NOTE:


NOTE:

When determining cylinder bore grade, measure the cylinder bore (B) direction at (D) position.

Standard:

Cylinder bore inner diameter : Refer to EM-123, "Cylinder Block".

Limit:

Out-of-round [Difference between (A) and (B)] Taper [Difference between (C) and (D)] : Refer to EM-123, "Cylinder Block".

NOTE:

Oversize piston is not provided.

Piston Skirt Diameter

Measure the outer diameter of piston skirt using suitable tool (A).

Standard : Refer to EM-123, "Cylinder Block".

Piston to Cylinder Bore Clearance


Piston to Cylinder Bore Clearance

Calculate by piston skirt diameter and cylinder bore inner diameter [direction (B), position (D)].

(A) : Direction A

(C) : Position C

(E) : Position E

(f) : 10 mm (0.39 in)

(g) : 60 mm (2.36 in)

(h) : 130 mm (5.12 in)

(Clearance) = (Cylinder bore inner diameter) – (Piston skirt diameter)

Standard and Limit : Refer to EM-123, "Cylinder Block".


Standard and Limit : Refer to EM-123, "Cylinder Block".

Crankshaft main journal diameter

Standard : Refer to EM-123, "Cylinder Block".

Crankshaft pin journal diameter


Crankshaft pin journal diameter

Standard : Refer to EM-123, "Cylinder Block".

Out-of-round and taper of crankshaft

Limit: Out-of-round [Difference between (X) and (Y)] Taper [Difference between (A) and (B)] : Refer to EM-123, "Cylinder Block".


Crankshaft runout

Standard and limit : refer to em-123, "cylinder block".

Connecting rod bearing oil clearance


Connecting rod bearing oil clearance

Method by Calculation

(A) : Example

(B) : Inner diameter measuring direction


Standard and Limit : Refer to EM-127, "Connecting Rod Bearing".

Method of Using Plastigage

CAUTION:

Do not rotate crankshaft.

NOTE:

The procedure when the measured value exceeds the limit is same as that described in the “Method by Calculation”.

Main bearing oil clearance


Main bearing oil clearance

Method by Calculation

(A) : Example

(B) : Inner diameter measuring direction


Standard and Limit : Refer to EM-127, "Main Bearing".

Method of Using Plastigage

CAUTION:

Do not rotate crankshaft.

NOTE:

The procedure when the measured value exceeds the limit is the same as that described in the “Method by Calculation”.

Main bearing crush height


Main bearing crush height

(A) : Example

Standard : There must be crush height.

Connecting rod bearing crush height


Connecting rod bearing crush height

(A) : Example

Standard : There must be crush height.

Main bearing cap bolt outer diameter


Main bearing cap bolt outer diameter

(A) : (d1) measuring position

(B) : (d2) measuring position

Limit [(d1) – (d2)]: 0.15 Mm (0.0059 In)

Connecting rod cap bolt outer diameter


Connecting rod cap bolt outer diameter

Limit: 7.75 Mm (0.3051 In)

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