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.
- If the engine front cover is newly replaced, tap the positioning pins in the two locations to the seal surface side.CAUTION:
- If a bolt with silicone sealant adhering to it is used, it could result in cracks in the cylinder head and cylinder block.
- When reusing an 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 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.
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.
- Install a new O-ring to the O-ring installation groove of the engine front cover.
- 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.
- Temporarily install an appropriate bolt to the drive belt auto tensioner installation bolt hole to prevent:
- Prepare an appropriate M8 x 1.25 bolt (length 40 mm {1.6 in}).CAUTION:
- For the number 3 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.
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.
- Return the engine wiring harness to its original position using the following procedure.
- Connect or install the following parts.
Step 1
Fig 2: Crankshaft Position Sensor, Engine Oil Solenoid Valve, A/F Sensor, Oil Pressure Switch Connectors, Wiring Harness Clips And Bolt With Torque SpecificationCourtesy of MAZDA MOTORS CORP.
COMPONENT DESCRIPTION1 Bolt 2 Wiring harness clip 3 Wiring harness clip 4 Crankshaft position (CKP) sensor connector 5 Engine oil solenoid valve connector 6 A/F sensor connector 7 Oil pressure switch connector Step 2
Courtesy of MAZDA MOTORS CORP.
COMPONENT DESCRIPTION1 Wiring harness clip 2 Wiring harness clip 3 Wiring harness protector installation nut - Install the throttle body. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION .)
- Connect or install the following parts.Fig 4: High Pressure Fuel Pump, Exhaust camshaft position sensor, Intake camshaft position sensor connectors, Wiring Harness Clip And Bolt With Torque Specification
Courtesy of MAZDA MOTORS CORP.
COMPONENT DESCRIPTION1 High pressure fuel pump connector 2 Exhaust camshaft position sensor connector 3 Intake camshaft position sensor connector 4 Wiring harness clip 5 Bolt - Connect the purge solenoid valve connector. (See PURGE SOLENOID VALVE REMOVAL/INSTALLATION .)
- Connect or install the following parts.