Engine Front Cover Installation Note

WARNING: This page is about a different car, the 2016 Mazda CX-3. However, it is still accessible from the selected car via links, so may be relevant.

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.

Fig 1: Installing Engine Front Cover

Courtesy of MAZDA

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

Fig 2: Tapping Positioning Pins In Seal Surface Side
Courtesy of MAZDA
CAUTION:
- If a bolt with sealant adhering to it is used, it could result in cracks in the cylinder head and cylinder block.
Fig 3: Identifying Bolt With Sealant
Courtesy of MAZDA
When reusing an engine front cover installation bolts, remove sealant adhering to the bolts.
CAUTION:
- If oil, dirt and sealant remains on the sealant application area, the silicone sealant will not seal which will cause oil leakage.
Completely clean and remove oil, dirt, sealant or other foreign matter that may be adhering to the engine front cover, cylinder head, and cylinder block.
CAUTION:
- Apply the silicon 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.

Fig 4: Identifying Silicone Sealant Applying Area To Engine Front Cover
Courtesy of MAZDA

Bead thickness
- A: 2-6 mm {0.1-0.2 in}
- B: 4-6 mm {0.16-0.23 in}
- C: 4-8 mm {0.2-0.3 in}
Apply silicone sealant (TB1217D or equivalent) to the areas shown in the figure.

Fig 5: Identifying Silicone Sealant Applying Areas
Courtesy of MAZDA
CAUTION:
- Apply the silicone sealant so that it goes into the cylinder head gasket.
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.
Fig 6: Identifying Drive Belt Auto Tensioner Installation Bolt Hole
Courtesy of MAZDA
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 7: Engine Front Cover Installation Bolts Tightening Sequence
Courtesy of MAZDA

Tightening torque
- 20-26 N.m {2.1-2.6 kgf.m, 15-19 ft.lbf}
Remove the bolt installed to the drive belt auto tensioner installation bolt hole when installing the drive belt auto tensioner.
Install the ground cable and wiring harness bracket shown in the figure.

Fig 8: Installing Ground Cable And Wiring Harness Bracket
Courtesy of MAZDA
Install the insulator shown in the figure.

Fig 9: Installing Insulator
Courtesy of MAZDA
Install the cooler hose (LO).

Fig 10: Installing Cooler Hose (LO)
Courtesy of MAZDA