Engine Front Cover Installation Note

WARNING: This page is about a different variant/trim than selected.

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 an engine front cover installation bolts, remove silicone sealant adhering to the bolts.
CAUTION:
- If oil, dirt, and sealant remain on the silicone sealant application surface and the step bead, the silicone sealant will not seal which will cause oil leakage.
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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.
Degrease the silicone sealant application surface and the step bead.
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.
- Do not apply silicone sealant to the step bead.
Install new O-rings to the engine front cover.

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NOTE:
- Install the O-rings so that the tabs of the O-rings recede into the notches.
Apply silicone sealant (TB1217D) to the engine front cover according to the directions shown in the figure.

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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}
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 bolts with new washer.
Tighten the engine front cover installation bolts in the order shown in the figure.

Fig 1: Engine Front Cover Bolts Tightening Sequence
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Tightening torque

20-26 N.m {2.1-2.6 kgf.m, 15-19 ft.lbf}
NOTE:
- Install stud bolts because there are no stud bolts installed on a new engine front cover.
- If the engine front cover is reused, tighten the stud bolts because they may have loosened.
Tighten the engine front cover stud bolts.

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Tightening torque

7-13 N.m {72-132 kgf.cm, 62-115 in.lbf}
Install the wiring harness bracket shown in the figure.

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Tightening torque

8-11 N.m {82-112 kgf.cm, 71-97 in.lbf}
Install the wiring harness clip shown in the figure.

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Install the insulator shown in the figure.

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Tightening torque

8-11 N.m {82-112 kgf.cm, 71-97 in.lbf}
Connect the A/F sensor connector and clip shown in the figure.

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