Intake Manifold Lower Removal / Installation - 3.0L: Removal

WARNING: This page is about a different car, the 2007 Mazda B3000. However, it is still accessible from the selected car via links, so may be relevant.

Drain the engine cooling system. See ENGINE COOLANT REPLACEMENT -- 3.0L .
Remove both valve covers. See VALVE COVER - (RH) REMOVAL / INSTALLATION - 3.0L , and VALVE COVER - (LH) REMOVAL / INSTALLATION - 3.0L .
Disconnect the upper radiator hose, heater hose and coolant bypass hose.

Fig 1: Locating Upper Radiator Hose, Heater Hose And Coolant Bypass Hose
Courtesy of MAZDA MOTORS CORP.
Disconnect the engine coolant temperature (ECT) sensor electrical connector.

Fig 2: Locating Engine Coolant Temperature (ECT) Sensor Electrical Connector
Courtesy of MAZDA MOTORS CORP.
Disconnect the crankshaft position (CKP) sensor and detach the wiring from the stud bolt.

Fig 3: Locating Crankshaft Position (CKP) Sensor With Stud Bolt
Courtesy of MAZDA MOTORS CORP.
Disconnect the fuel injector electrical connectors and position the engine wiring harness aside.
Relieve the fuel system pressure and disconnect the fuel tube spring lock coupling. See FUEL LINE AND VAPOR LINE QUICK DISCONNECT FITTINGS , .
Loosen the rocker arm bolts.

Fig 4: Locating Rocker Arms And Push Rods Bolts
Courtesy of MAZDA MOTORS CORP.
Remove the push rod for the number three cylinder intake valve.
Remove the bolts from the lower intake manifold.

Fig 5: Locating Lower Intake Manifold Bolt
Courtesy of MAZDA MOTORS CORP.
NOTE:
- Gently loosen the intake manifold to separate the silicone sealant from the cylinder block.
Remove the lower intake manifold.

Fig 6: Locating Lower Intake Manifold
Courtesy of MAZDA MOTORS CORP.
Remove and discard the intake manifold gaskets and end seals.

Fig 7: Locating Intake Manifold Gaskets And End Seals
Courtesy of MAZDA MOTORS CORP.
CAUTION:
- Do not use metal scrapers, wire brushes, power abrasive discs or other abrasive means to clean the sealing surfaces. These tools cause scratches and gouges, which make leak paths. Use a plastic scraping tool to remove all traces of old sealant.
NOTE:
- To clean the sealing area, use silicone gasket remover and metal surface prep. Observe all warnings and cautions and follow all application directions contained on the packaging of the silicone gasket remover and metal surface prep.
Clean the lower intake manifold gasket mating surfaces.