Disassembly and Assembly: Assembly

1. Using the valve guide reamer (commercial service tool) (A), ream cylinder head valve guide hole.

   Valve guide hole diameter (for service parts): 

   Intake and exhaust 

   :  Refer to CYLINDER HEAD  .

   Fig 1: Reaming Cylinder Head Valve Guide Hole Using Valve Ridge Reamer

   Courtesy of NISSAN MOTOR CO., U.S.A.
2. Heat cylinder head to 110 to 130°C (230 to 266°F) by soaking in heated oil (A).
   Fig 2: Heating Cylinder Head

   Courtesy of NISSAN MOTOR CO., U.S.A.
3. Using the valve guide drift (commercial service tool), press valve guide from camshaft side to the dimensions as shown in the figure.

   Projection (A) 

   Intake and exhaust 

   :  Refer to CYLINDER HEAD  .

   WARNING: Cylinder head contains heat. When working, wear protective equipment to avoid getting burned.
   Fig 3: Identifying Intake & Exhaust Valve Dimensions

   Courtesy of NISSAN MOTOR CO., U.S.A.
4. Using the valve guide reamer (commercial service tool) (A), apply reamer finish to valve guide.

   Standard (Intake and exhaust):  Refer to CYLINDER HEAD  .

   Fig 4: Reaming Cylinder Head Valve Guide Hole Using Valve Guide Reamer

   Courtesy of NISSAN MOTOR CO., U.S.A.

1. Ream cylinder head recess diameter (a) for service valve seat.

   Oversize (Intake and exhaust):  Refer to CYLINDER HEAD  .

   • Be sure to ream in circles concentric to valve guide center. This will enable valve to fit correctly.
     Fig 5: Identifying Cylinder Head Diameter

     Courtesy of NISSAN MOTOR CO., U.S.A.
2. Heat cylinder head to 110 to 130°C (230 to 266°F) by soaking in heated oil (A).
   Fig 6: Heating Cylinder Head

   Courtesy of NISSAN MOTOR CO., U.S.A.
3. Provide valve seats cooled well with dry ice. Force fit valve seat into cylinder head.
   WARNING: Cylinder head contains heat. When working, wear protective equipment to avoid getting burned.
   CAUTION: Never directly touching cold valve seats.
4. Using the valve seat cutter set (commercial service tool) or valve seat grinder, finish seat to the specified dimensions. Refer to CYLINDER HEAD  .
   CAUTION: When using the valve seat cutter, firmly grip cutter handle with both hands. Then, press on the contacting surface all around the circumference to cut in a single drive. Improper pressure on with cutter or cutting many different times may result in stage valve seat.
   Fig 7: Finishing Valve Seat Using Valve Seat Grinder

   Courtesy of NISSAN MOTOR CO., U.S.A.
5. Using compound, grind to adjust valve fitting.
6. Check again for normal contact. Refer to VALVE SEAT CONTACT .

1. Apply new engine oil on valve oil seal joint and seal lip.
2. Install with the valve oil seal drift [SST: KV10115600 (J-38958)] (A) to match dimension in the figure.

   Height (b) (Without valve spring seat installed) 

   Intake and exhaust: 14.3 - 14.9 mm (0.563 - 0.587 in) 

   Fig 8: Tapping Oil Seal Using Valve Oil Seal Drift

   Courtesy of NISSAN MOTOR CO., U.S.A.

• Install narrow pitch end to cylinder head side (valve spring seat side).
  Fig 9: Identifying Valve Spring Installation Position

  Courtesy of NISSAN MOTOR CO., U.S.A.

  Paint mark color: Yellowish green 

• Compress valve spring with the valve spring compressor [SST: KV10116200 (J26336-A)] (A), the attachment [SST: KV10115900 (J26336-20)] (C) and the adapter [SST: KV10116200 ( - )] (B). Install valve collet with a magnet hand.
  CAUTION: When working, take care not to damage valve lifter holes.
• Tap valve stem edge lightly with plastic hammer after installation to check its installed condition.
  Fig 10: Compressing Valve Spring Using Valve Spring Compressor, Attachment & Adapter

  Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 11: Identifying Crankshaft Key

Courtesy of NISSAN MOTOR CO., U.S.A.

• Crankshaft key should line up with the bank 1 cylinder center line as shown in the figure.

Fig 12: Identifying Cylinder Head Bolts Tightening Sequence

Courtesy of NISSAN MOTOR CO., U.S.A.

1. Apply new engine oil to threads and seat surfaces of cylinder head bolts.
2. Tighten all cylinder head bolts.

   Specified Torque: 105 N.m (11 kg-m, 77 ft-lb) 

3. Completely loosen all cylinder head bolts.

   Specified Torque: 0 N.m (0 kg-m, 0 ft-lb) 

   CAUTION: In step "c", loosen bolts in reverse order of that indicated in the figure.
4. Tighten all cylinder head bolts.

   Specific Torque: 40.0 N.m (4.1 kg-m, 30 ft-lb) 

5. Turn all cylinder head bolts 95 degrees clockwise (angle tightening).
   CAUTION: Check the tightening angle by using the angle wrench [SST: KV10112100 (BT8653-A)] (A). Never make judgment by visual inspection.
   • Check tightening angle indicated on the angle wrench indicator plate.
6. Turn all cylinder head bolts 95 degrees clockwise again (angle tightening).
   Fig 13: Identifying Cylinder Head Bolts Tightening Sequence

   Courtesy of NISSAN MOTOR CO., U.S.A.

Standard: 14.1 - 14.9 mm (0.555 - 0.587 in) 

• If measured value is out of the standard, reinstall cylinder head.
  Fig 14: Measuring Distance Between Front End Faces Of Cylinder Block & Cylinder Head

  Courtesy of NISSAN MOTOR CO., U.S.A.

• Install it in the original position.

• Press-fit spark plug tube as follows:

1. Remove old locking sealant adhering to cylinder head mounting hole.
2. Apply sealant to area within approximately 12 mm (0.47 in) from edge of spark plug tube press-fit side.

   Use Genuine high strength thread locking sealant or equivalent.  Refer to RECOMMENDED CHEMICAL PRODUCTS AND SEALANTS .

3. Using drift, press-fit spark plug tube so that its height (A) is as specified in the figure.
   Fig 15: Identifying Sealant Application Area

   Courtesy of NISSAN MOTOR CO., U.S.A.

   Standard press-fit height: 

   : 37.7 - 38.7 mm (1.484 - 1.524 in) 

   CAUTION:

   • When press-fitting, take care not to deform spark plug tube.
   • After press-fitting, wipe off liquid gasket protruding onto cylinder-head upper face.