Nissan Sentra manuals

Nissan Sentra Service Manual: Timing chain

Exploded View


  1. Timing chain slack guide
  2. Timing chain tensioner
  3. Timing chain
  4. Oil pump drive chain
  5. Crankshaft sprocket
  6. Crankshaft key
  7. Oil pump sprocket
  8. Front cover
  9. O-ring
  10. O-ring
  11. Valve timing control solenoid valve cover
  12. O-ring
  13. Valve timing control solenoid valve (EXH)
  14. Valve timing control solenoid valve (INT)
  15. Crankshaft pulley bolt
  16. Crankshaft pulley
  17. Front oil seal
  18. Oil pump drive chain tensioner
  19. O-ring
  20. Timing chain tension guide
  21. Camshaft sprocket (INT)
  22. Camshaft sprocket (EXH)
  23. O-ring
  1. Refer to EM-60
  2. Refer to INSTALLATION

Removal and Installation

REMOVAL

CAUTION:

The rotating direction is shown from the engine front.

  1. Disconnect battery negative terminal. Refer to PG-50, "Exploded View".
  2. Drain engine oil. Refer to LU-8, "Draining".

CAUTION:

Perform this step when engine is cold.

  1. Remove intake manifold. Refer to EM-27, "Exploded View".
  2. Remove the rocker cover. Refer to EM-12, "Exploded View".
  3. Remove fender protector side cover (RH). Refer to EXT-27, "FENDER PROTECTOR : Exploded View".
  4. Support engine (1) and transaxle (2) using suitable jack (A).

CAUTION:


  1. Remove upper torque rod and engine mounting insulator (RH). Refer to EM-82, "M/T : Exploded View" (M/T) or EM-86, "CVT : Exploded View" (CVT).
  2. Set No. 1 cylinder at TDC on its compression stroke with the following procedure:
  1. Rotate crankshaft pulley (1) clockwise and align TDC mark (no paint) (B) to timing indicator (A) on front cover.

(C) : White paint mark (Not used for service)


  1. At the same time, check that the cam lobes of the No. 1 cylinder are located ( ) as shown.

(1) : Camshaft (INT)


(1) : Camshaft (INT)

(2) : Camshaft (EXH)

  1. Remove crankshaft pulley with the following procedure:
  1. Remove drive belt. Refer to EM-15, "Exploded View".
  2. Lock crankshaft pulley (1) using suitable tool (A), loosen crankshaft pulley bolt, and locate bolt seating surface at 10 mm (0.39 in) from its original position.

CAUTION:

Do not remove the crankshaft pulley bolt as it will be used as a supporting point for the Tool.

Tool number : KV11103000 ( — )


  1. Attach Tool (A) in the M6 thread hole on crankshaft pulley (1), and remove crankshaft pulley.

Tool number : KV11103000 ( — )


  1. Remove oil pan (lower). Refer to EM-33, "Exploded View".

NOTE:

If crankshaft sprocket and oil pump drive component are not removed, this step is unnecessary.

  1. Remove intake valve timing control solenoid valve.
  2. Remove drive belt auto-tensioner. Refer to EM-16, "Exploded View".
  3. Remove front cover with the following procedure:
  1. Loosen bolts in reverse order as shown.


  1. Cut liquid gasket by prying the position ( tool, and then remove the front cover. ) shown using suitable
    tool, and then remove the front cover.

CAUTION:


CAUTION:

  1. Remove front oil seal from front cover.

CAUTION:

Be careful not to damage front cover.

  1. Remove valve timing control cover, if necessary.

NOTE:

Disregard the numerical order No.1 in removal


  1. Remove timing chain tensioner with the following procedure:
  1. Insert a stopper pin (A) into the top groove with the timing chain tensioner plunger pressed.

NOTE:

Timing chain tensioner plunger is securely locked by inserting a stopper pin.

  1. Remove timing chain tensioner (1).


  1. Remove slack guide (2), tension guide (3) and timing chain (1).

CAUTION:

Do not rotate each crankshaft and camshaft individually while timing chain is removed. It causes interference between valve and piston.

NOTE:

If timing chain is difficult to remove, remove camshaft sprocket (EXH) first to remove timing chain.


  1. Remove crankshaft sprocket and oil pump drive component with the following procedure:
  1. Push oil pump drive chain tensioner (1) in the direction as shown.
  2. Insert a stopper pin (A) into the body hole (B).
  3. Remove oil pump chain tensioner.
  1. Hold the WAF part of oil pump shaft [WAF: 10 mm (0.39 in)] (A), and then loosen the oil pump sprocket bolt and remove it.

(1) : Oil pan (upper)

CAUTION:


CAUTION:

INSTALLATION

CAUTION:

Do not reuse O-rings.

NOTE:

The figure shows the relationship between the matching mark on each timing chain and that on the corresponding sprocket, with the components installed.

(1) : Timing chain

(2) : Camshaft sprocket (EXH)

(3) : Slack guide

(4) : Timing chain tensioner

(5) : Crankshaft sprocket

(6) : Oil pump drive chain

(7) : Oil pump sprocket

(8) : Oil pump drive chain tensioner

(9) : Tension guide

(10) : Camshaft sprocket (INT)

(A) : Matching mark (dark blue link)

(B) : Matching mark (outer groove)

(C) : Crankshaft key position (straight up)

(D) : Matching mark (stamping)

(E) : Matching mark (white link)

(F) : Matching mark (yellow link)

(G) : Matching mark (outer groove)


  1. Check that crankshaft key points straight up.
  2. Install crankshaft sprocket (2), oil pump sprocket (3) and oil pump drive chain (1).

(A) : Matching mark (stamping)

(B) : Matching mark (yellow link)

(C) : Matching mark (dark blue link)


CAUTION:

Check matching mark position of each sprocket after installing the oil pump drive chain.

  1. Hold the WAF part of oil pump shaft [WAF: 10 mm (0.39 in)] (A), and then tighten the oil pump shaft sprocket bolt.

(1) : Oil pan (upper)

CAUTION:


CAUTION:

  1. Install oil pump chain tensioner (1).


  1. Align the matching marks of each sprocket with the matching marks of timing chain.

(1) : Camshaft sprocket (EXH)

(2) : Camshaft sprocket (INT)

(3) : Timing chain

(A) : Matching mark (dark blue link)

(B) : Matching mark (outer groove)

(C) : Matching mark (outer groove)

(D) : Matching mark (copper link)

(E) : Matching mark (stamping)

CAUTION:


CAUTION:

Check matching mark position of each sprocket and timing chain again after installing the timing chain.

  1. Install the slack guide (2) and the tension guide (3).

(1) : Timing chain


  1. Install timing chain tensioner.

CAUTION:

  1. Check matching mark position of timing chain and each sprocket again
  2. Install front oil seal. Refer to EM-70, "FRONT OIL SEAL : Removal and Installation".
  3. Install front cover with the following procedure:
  1. Install valve timing control cover, if removed.

(1) : Front cover

(2) : Valve timing control cover

(A) : Start and end of gasket application

(B) : Liquid gasket application area

(E) : Gasket

(c) : 4.0 - 5.6 mm (0.157 - 0.220 in)

(d) : 3.4 - 4.4 mm (0.134 - 0.173 in)

NOTE:


NOTE:

The start and end of gasket application must overlap 5 mm or more with one another.

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

CAUTION:


NOTE:

Tighten bolt the No.1 in two step. The numerical order No.6 shows the second step.

  1. Install new O-ring to cylinder block

CAUTION:

  1. Apply a continuous bead of liquid gasket (D) using suitable tool to front cover as shown.

(1) : Cylinder head

(2) : Front cover

(A) : Liquid gasket application area

(b) : 4.0 - 5.6 mm (0.157 - 0.220 in)

(c) : 3.4 - 4.4 mm (0.134 - 0.173 in)

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

CAUTION:


CAUTION:

  1. Check that matching marks of timing chain and each sprocket are still aligned. Then install front cover.

CAUTION:

  1. Install front cover, and tighten bolts in numerical order as shown.

M6 bolt : No. 1


M6 bolt : No. 1

M10 bolts : No. 6, 7, 10, 13, 21

M12 bolts : No. 2, 4, 8, 11

M8 bolts : Except the above

  1. After all bolts are tightened, retighten them to specified torque in numerical order as shown.

CAUTION:

Be sure to wipe off any excessive liquid gasket.


  1. Install crankshaft pulley with the following procedure:
  1. When inserting crankshaft pulley with a plastic hammer, tap on its center portion (not circumference).

CAUTION:

Do not damage front oil seal lip.

  1. Secure crankshaft pulley (1) using suitable tool (A).
  2. Apply new engine oil to thread and seat surfaces of crankshaft pulley bolt.
  3. Tighten crankshaft pulley bolt.

Crankshaft pulley bolt : 29.4 NВ·m (3.0 kg-m, 22 ft-lb)


  1. Put a paint mark (B) on crankshaft pulley (2), matching with any one of six easy to recognize angle marks (A) on crankshaft pulley bolt (1) flange.
  2. Turn another 60 degrees clockwise (angle tightening).
  1. Check that crankshaft rotates clockwise smoothly.


  1. Installation of remaining components is in the reverse order of removal.

Inspection

INSPECTION AFTER REMOVAL

Timing Chain

Check for cracks (A) and any excessive wear (B) at link plates and roller links of timing chain. Replace timing chain if necessary.

INSPECTION AFTER INSTALLATION


INSPECTION AFTER INSTALLATION

NOTE:

If hydraulic pressure inside chain tensioner drops after removal and installation, slack in guide may generate a pounding noise during and just after the engine start. However, this is normal. Noise will stop after hydraulic pressure rises.

*: Power steering fluid, brake fluid, etc.


*: Power steering fluid, brake fluid, etc.

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