Lower Cylinder Block Assembly Note

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2008 Mazda 6, 2007 Mazda 6, 2006 Mazda 6, 2005 Mazda 6, and 2004 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

Apply a continuous bead of silicone sealant to the upper cylinder block as indicated in the figure.

Fig 1: Applying Silicone Sealant
Courtesy of MAZDA MOTORS CORP.

CAUTION:

Because bolts 1-16 are pliant bolts, they cannot be reused. Replace bolts 1-8 with new bolts and use bolts 9-16 installed during inspection when assembling the lower cylinder block.

Fig 2: Identifying Lower Cylinder Block Bolts

Courtesy of MAZDA MOTORS CORP.

Fig 3: Lower Cylinder Block Bolt Tightening Sequence

Courtesy of MAZDA MOTORS CORP.

Install the lower cylinder block bolts in the order indicated in the figure.
Tightening Torque

3.0-5.0 N.m {30-51 kgf.cm, 27-44 in.lbf}
Push crankshaft forward and then rearward to seat the crankshaft thrust washer.
Tighten the lower cylinder block bolts in the order indicated in the figure in four steps.
1. Bolts 1-8: tighten to 22-28 N.m {2.2-2.9 kgf.m, 16-20 ft.lbf} .
2. Bolts 9-16: tighten to37-43 N.m {3.7-4.4 kgf.m, 27-31 ft.lbf} .
3. Bolts 1-16: tighten 85°-95° .
4. Bolts 17-22: tighten to 20-30 N.m {2.1-3.0 kgf.m, 15-22 ft-lbf} .
5. Verify that the crankshaft rotates freely.
  
  Fig 4: Lower Cylinder Block Bolt Tightening Sequence
  Courtesy of MAZDA MOTORS CORP.
Assemble rear oil seal with part A of the SST [303-178 (49 UN01 070)] and the SST [303-384 (49 UN30 3384)].

Fig 5: Assembling SST & Oil Seal
Courtesy of MAZDA MOTORS CORP.
1. Install the studs of the SST as indicated in the figure.
  
  Fig 6: Installing SST Studs
  Courtesy of MAZDA MOTORS CORP.
2. Apply clean engine oil to the oil seal.
3. Push the oil seal slightly in by hand.
4. Install part A of the SST [303-178 (49 UN01 070)] and compress the oil seal with the nuts of the SST [303-384 (49 UN30 3384)].
  
  Fig 7: Installing Oil Seal
  Courtesy of MAZDA MOTORS CORP.