Engine Removal / Installation - 2.3L

WARNING: This page is about a different car, the 2007 Mazda B2300. However, it is still accessible from the selected car via links, so may be relevant.

With the vehicle in NEUTRAL, position it on a hoist. See LIFTING .
Relieve the fuel pressure. See FUEL PRESSURE RELIEF , .
Disconnect the battery. See BATTERY DISCONNECT .
Recover the A/C system. See A/C REFRIGERANT SYSTEM TESTS .
Drain the engine cooling system. See ENGINE COOLANT REPLACEMENT -- 2.3L .
Drain the engine oil.
Remove the hood.

Fig 1: Accelerator Control Splash Shield Bolt With Torque Specifications
Courtesy of MAZDA MOTORS CORP.
Remove the accelerator control splash shield.
Remove the air cleaner tube. See AIR CLEANER OUTLET PIPE REMOVAL / INSTALLATION - 2.3L , .

Fig 2: Locating Upper Radiator Hose
Courtesy of MAZDA MOTORS CORP.
Remove the upper radiator hose.

Fig 3: Locating Lower Radiator Hose
Courtesy of MAZDA MOTORS CORP.
Remove the lower radiator hose.
Remove the fan and shroud. See ELECTRIC COOLING FAN REMOVAL / INSTALLATION -- 2.3L .

Fig 4: Locating Powertrain Control Module (PCM) Electrical Connectors
Courtesy of MAZDA MOTORS CORP.
Disconnect the powertrain control module (PCM) electrical connectors. Remove the retaining nut on the harness clamp. Position the harness on the engine.
Tightening Torque:

4 Nm {35 ft-lbi}

Fig 5: Locating Ground Stud
Courtesy of MAZDA MOTORS CORP.
Remove the ground stud for the PCM.
Tightening Torque:

10 Nm {89 ft-lbi}

Fig 6: Identifying Heater Hose Assembly
Courtesy of MAZDA MOTORS CORP.
Remove the heater hose assembly.
1. Disconnect the heater water hoses at the bulkhead.
2. Disconnect the vacuum hose.
3. Disconnect the heater water hoses at the engine and remove the assembly.
Fig 7: Locating Vacuum Hose
Courtesy of MAZDA MOTORS CORP.
Disconnect the vacuum hose to the vacuum reservoir.

Fig 8: Locating Engine-To-Degas Bottle Bypass Hose
Courtesy of MAZDA MOTORS CORP.
Disconnect the engine-to-degas bottle bypass hose.

Fig 9: Locating Degas Bottle-To-Engine Supply Hose
Courtesy of MAZDA MOTORS CORP.
Disconnect the degas bottle-to-engine supply hose.

Fig 10: Locating A/C Compressor Clutch Electrical Connector
Courtesy of MAZDA MOTORS CORP.
Disconnect the A/C compressor clutch.

Fig 11: Locating Mass Airflow Sensor (MAF) Electrical Connector
Courtesy of MAZDA MOTORS CORP.
Disconnect the mass airflow sensor (MAF) electrical connector.

Fig 12: A/C Compressor Manifold Bolt With Torque Specifications
Courtesy of MAZDA MOTORS CORP.
Disconnect the A/C compressor manifold, plug the lines and the compressor ports.

Fig 13: Identifying Accelerator And Cruise Control Cable
Courtesy of MAZDA MOTORS CORP.
Position the accelerator and cruise control cables aside.
1. Disconnect the accelerator cable and cruise control cable (if equipped) from the throttle linkage.
2. Disconnect the accelerator cable and cruise control cable (if equipped) from the mounting bracket and position out of the way.
Fig 14: Power Steering Pressure (PSP) Switch With Torque Specifications
Courtesy of MAZDA MOTORS CORP.
Disconnect and position aside the following:
1. The power steering pressure (PSP)switch electrical connector.
2. The high pressure power steering hose.
Disconnect the fuel supply tube. See FUEL INJECTION SUPPLY MANIFOLD AND FUEL INJECTOR - 2.3L REMOVAL / INSTALLATION .

Fig 15: Locating Electrical Connectors And Evaporative Purge Hose
Courtesy of MAZDA MOTORS CORP.
Disconnect the electrical connectors and evaporative purge hose.

Fig 16: Locating Brake Booster Vacuum Hose And Engine Ground Strap
Courtesy of MAZDA MOTORS CORP.
Disconnect the brake booster vacuum hose and the engine ground strap.
Tightening Torque:

10 Nm {89 ft-lbi}

Fig 17: Bolts With Torque Specifications
Courtesy of MAZDA MOTORS CORP.
Disconnect the negative battery cable. Disconnect the positive battery cable. Disconnect the solenoid control wire at the starter.

Fig 18: Starter Wiring Harness Clamp Bolt With Torque Specifications
Courtesy of MAZDA MOTORS CORP.
Remove the starter wiring harness clamp bolt and position it out of the way.
Tightening Torque:

24 Nm {18 ft-lbf}

Fig 19: Locating Pushpins
Courtesy of MAZDA MOTORS CORP.
Position the RH splash shield out of the way.

Fig 20: Locating Alternator Electrical Connections With Torque Specifications
Courtesy of MAZDA MOTORS CORP.
Disconnect the alternator electrical connections.

Fig 21: Locating Alternator Wiring Pin-Type Retainer
Courtesy of MAZDA MOTORS CORP.
Detach alternator wiring pin-type retainer.

Fig 22: Locating Block Heater Electrical Connector
Courtesy of MAZDA MOTORS CORP.
Disconnect the block heater electrical connector, if equipped.

Fig 23: Locating Alternator Wiring Pin-Type Retainer
Courtesy of MAZDA MOTORS CORP.
Disconnect the front heated oxygen sensor (HO2S) electrical connector at the bell housing.

Fig 24: Locating Cooling Tube Bracket With Torque Specifications
Courtesy of MAZDA MOTORS CORP.
If the vehicle is equipped with an automatic transmission, remove the bolt retaining the transmission cooling tubes to the engine and remove the bracket.

Fig 25: Transmission Dust Shield Bolt With Torque Specifications
Courtesy of MAZDA MOTORS CORP.
Remove the transmission dust shield.

Fig 26: Exhaust Manifold-To-Front Pipe Nuts With Torque Specifications
Courtesy of MAZDA MOTORS CORP.
Remove the exhaust manifold-to-front pipe nuts.

Fig 27: Locating Engine Wiring Harness Anchor
Courtesy of MAZDA MOTORS CORP.
Disconnect the engine wiring harness anchor and the pin-type retainer, then position the wiring harness aside.

Fig 28: Locating Oil Pressure Sensor Electrical Connector
Courtesy of MAZDA MOTORS CORP.
Disconnect the oil pressure sensor electrical connector.

Fig 29: Locating Engine Oil Filter
Courtesy of MAZDA MOTORS CORP.
Remove the engine oil filter.

Fig 30: Locating Wiring Harness And Electrical Connector
Courtesy of MAZDA MOTORS CORP.
Disconnect the wiring harness from the crossmember and disconnect the electrical connector. Route the wiring harness to the transmission

Fig 31: Locating Heated Oxygen Sensor (HO2S) Electrical Connector
Courtesy of MAZDA MOTORS CORP.
If equipped with automatic transmission, disconnect the heated oxygen sensor (HO2S) electrical connector.

Fig 32: Locating Catalyst Monitor Sensor Electrical Connector And Nut
Courtesy of MAZDA MOTORS CORP.
If equipped with automatic transmission, disconnect the catalyst monitor sensor electrical connector. Remove the nut and route the wiring harness over the transmission.
Tightening Torque:

10 Nm {89ft-lbi}

Fig 33: Locating Transmission Electrical Connectors And Wiring Harness Retainers
Courtesy of MAZDA MOTORS CORP.
If equipped with automatic transmission, disconnect the transmission electrical connectors and detach the wiring harness retainers.

Fig 34: Locating Wiring Harness Retainers
Courtesy of MAZDA MOTORS CORP.
If equipped with automatic transmission, detach the wiring harness retainers.

Fig 35: Locating HO2S Electrical Connector
Courtesy of MAZDA MOTORS CORP.
If equipped with manual transmission, disconnect the HO2S electrical connector.

Fig 36: Locating Catalyst Monitor Sensor Electrical Connector And Nut
Courtesy of MAZDA MOTORS CORP.
If equipped with manual transmission, disconnect the catalyst monitor sensor electrical connector. Remove the nut and route the wiring harness over the transmission.
Tightening Torque:

10 Nm {89 ft-lbi}

Fig 37: Locating Wiring Harness Retainers
Courtesy of MAZDA MOTORS CORP.
If equipped with manual transmission, disconnect the transmission electrical connectors and detach the wiring harness retainers.
Route the transmission portion of the wiring harness to the transmission.

Fig 38: Oil Filter Adapter Bolt With Torque Specifications
Courtesy of MAZDA MOTORS CORP.
Remove the oil filter adapter.
Remove the starter motor. See STARTER MOTOR REMOVAL / INSTALLATION -- 2.3L .

Fig 39: Locating Starter Dust Shield
Courtesy of MAZDA MOTORS CORP.
Remove the starter dust shield.

Fig 40: Torque Converter Nuts With Torque Specifications
Courtesy of MAZDA MOTORS CORP.
NOTE:
- Mark one stud and the flexplate for assembly reference.
If equipped with automatic transmission, remove the four torque converter nuts.

Fig 41: Transmission-To-Engine Bolts With Torque Specifications
Courtesy of MAZDA MOTORS CORP.
NOTE:
- Leave two side bolts in until the engine is ready to be removed.
Remove nine of the transmission-to-engine bolts.

Fig 42: Locating Transmission Fluid Tube
Courtesy of MAZDA MOTORS CORP.
On vehicles equipped with an automatic transmission, remove the transmission fluid indicator and tube assembly.

Fig 43: Locating Engine Lifting Eyes (SST)
Courtesy of MAZDA MOTORS CORP.
Install the engine lifting eyes SST (303-D050) or equivalent.
Support the transmission with a floor jack.

Fig 44: Supporting Engine With Floor Crane Using Spreader Bar
Courtesy of MAZDA MOTORS CORP.
Support the engine with the floor crane using the spreader bar.
Remove the two side transmission-to-engine bolts.

Fig 45: Engine Support Insulator Nuts With Torque Specifications
Courtesy of MAZDA MOTORS CORP.
NOTE:
- Left side shown, right side similar.
Remove the four engine support insulator nuts.
Remove the engine from the vehicle.
On vehicles equipped with a manual transmissions, remove the clutch. See CLUTCH DISC AND COVER REMOVAL / INSTALLATION .
Remove the flywheel or flexplate. See FLY-WHEEL/FLEXPLATE REMOVAL / INSTALLATION - 2.3L , .
Mount the engine on a suitable work stand.
To install, reverse the removal procedure.