Lower Cylinder Block Assembly Note

Completely clean and remove any oil, dirt, sealant or other foreign matter that may be adhering to the lower cylinder block and cylinder block.
When reusing the lower cylinder block Bolts, clean any old sealant from the bolts.
CAUTION:
- Apply silicon sealant in a single, unbroken line.
- To prevent silicon sealant from hardening, adhere the engine front cover and the cylinder block firmly within 10 min. after applying silicon sealant. After adhering them, tighten the Bolts immediately.
- Using bolts with the old seal adhering could cause cracks in the cylinder block.
Fig 1: Cleaning Old Sealant From Bolts
Courtesy of MAZDA MOTORS CORP.
Apply silicon sealant to the lower cylinder block shown in the figure.

Fig 2: Identifying Silicon Sealant Applying Area To Lower Cylinder Block
Courtesy of MAZDA MOTORS CORP.

Bead thickness 2-6 mm {0.1-0.2 in}
Install the lower cylinder block.
Tighten the lower cylinder block Bolts using the following procedure:
1. Apply clean engine oil to the seating surface and thread of lower cylinder block Bolts A.
2. Tighten lower cylinder block Bolts A in the order shown in the figure using the following procedure:
  Tightening procedure
  
  Step 1: 38-42 N.m {3.9-4.2 kgf.m, 29-30 ft.lbf}
  
  Step 2: Loosen all the bolts (until bolts are torque-free).
  
  Step 3: 30-34 N.m {3.1-3.4 kgf.m, 23-25 ft.lbf}
  
  Step 4: 57.5-62.5°
  
  Fig 3: Lower Cylinder Block Bolts A Tightening Sequence
  Courtesy of MAZDA MOTORS CORP.
3. Tighten the lower cylinder block Bolts B in the order shown in the figure.
  Tightening torque 19-25 N.m {2.0-2.5 kgf.m, 15-18 ft.lbf}
After verifying that silicone sealant protrudes to the rear oil seal press-in part, wipe away the excess silicone sealant.
- If silicone sealant does not protrude to the rear oil seal press-in part, remove the lower cylinder block and apply silicone sealant again.
  
  Fig 4: Lower Cylinder Block Bolts B Tightening Sequence
  Courtesy of MAZDA MOTORS CORP.