Engine Front Cover Installation Note

NOTE:

For a new engine front cover, the positioning pins in the two locations shown in the figure project to the outside of the engine.

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If the engine front cover is newly replaced, tap the positioning pins in the two locations to the seal surface side.

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CAUTION:
- If a bolt with silicone sealant adhering to it is used, it could result in cracks in the cylinder head and cylinder block.
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When reusing the engine front cover installation bolts, remove silicone sealant adhering to the bolts.
CAUTION:
- If oil, dirt and silicone sealant remains on the silicone sealant application area, the silicone sealant will not seal which will cause oil leakage.
Completely clean and remove oil, dirt, silicone sealant or other foreign matter that may be adhering to the engine front cover, cylinder head, and cylinder block.
CAUTION:
- Apply the silicone sealant in a single, unbroken line.
- To prevent silicone sealant from hardening, adhere the engine front cover and the cylinder block firmly within 10 min. after applying silicone sealant. After adhering them, tighten the installation bolts immediately.
Apply silicone sealant (TB1217D or equivalent) to the engine front cover as shown in the figure.

Courtesy of MAZDA MOTORS CORP.

Bead thickness
1. 2-6 mm {0.1-0.2 in}
2. 4-6 mm {0.16-0.23 in}
3. 4-8 mm {0.2-0.3 in}
CAUTION:
- Apply the silicone sealant so that it goes into the cylinder head gasket.
Apply silicone sealant (TB1217D or equivalent) to the areas shown in the figure.

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Install the engine front cover to the engine.
NOTE:
- Temporarily install an appropriate bolt to the drive belt auto tensioner installation bolt hole to prevent:
  - A silicone sealant adhesion malfunction in the drive belt auto tensioner installation bolt hole.
  - A bolt mis-installation due to silicone sealant hardening.
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Prepare an appropriate M8 x 1.25 bolt (length 40 mm {1.6 in}).
CAUTION:
- For the number 10 bolt of the tightening order, install the bolt with new washer.
Tighten the engine front cover installation bolts in the order shown in the figure.

Fig 1: Engine Front Cover Installation Bolts Tightening Sequence
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Tightening torque

20-26 N.m {2.1-2.6 kgf.m, 15-19 ft.lbf}
Install the ground cable and wiring harness bracket shown in the figure.

Fig 2: Ground Cable Bolts With Torque Specification
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Install the insulator shown in the figure.

Fig 3: Insulator Bolt With Torque Specification
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Install the cooler hose (LO).

Fig 4: Cooler Hose (LO) Nut With Torque Specification
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