Mazda 323, 626, 929, GLC, MX-6, RX-7 Repair Manual 1978-1989

OIL PAN | REMOVAL AND INSTALLATION

EXCEPT 323, 1988-1989 626/MX-6 AND 929
(See Figures 131, 132, 133 and 134)

1. Disconnect the negative battery cable.



2. Raise the front of the car and safely support it on jackstands.



3. Remove the under cover, if applicable, and drain the engine oil. Remove the engine splash shield or skid plate.



4. Remove the clutch slave cylinder, if so equipped. Do not disconnect the hydraulic line; let the cylinder hang or support it with rope or wire.



5. Remove the engine rear brace attaching bolts and loosen the bolts on the left side, if present.



6. Disconnect the emission line from the oil pan, it so equipped.



7. Loosen the front motor mounts, raise the front of the engine and support with a wooden block to gain clearance, if necessary (except on front wheel drive GLCs and 626s).



8. On front wheel drive cars, loosen the bolts attaching the exhaust pipe to the manifold and lower the pipe; also, disconnect the engine torque brace. On the 626, disconnect the No. 3 engine mount, located near the driver's side of the pan.



9. Unfasten the oil pan retaining bolts, and then remove the oil pan and allow it to rest on the crossmember. Remove the oil pump pickup tube, if necessary, to remove the oil pan.


TO INSTALL


10. Thoroughly clean all the gasket mating surfaces. Check the oil pan for cracks or other damage in the area of the bolt holes. Remove the oil pan drain plug and check the pan threads for wear and damage. Clean up the threads with a tap, as required.



11. Install the oil pump pickup tube, if previously removed.



12. On 1983-87 2.0L engines, there is no gasket. Apply a gasket forming sealant as shown in the illustration before installing the pan. Be sure to install the pan and torque the retaining bolts within 30 minutes.



13. On engines using a pan gasket, apply sealer to the joints between the front cover and block, as well as the rear main seal housing and block, before installing the gasket. Install the oil pan and torque the retaining bolts.



14. On front wheel drive cars, fasten the engine torque brace and the No. 3 engine mount, if applicable. Connect the exhaust pipe to the manifold.



15. On rear wheel drive cars, remove the wooden support block, if applicable, and then lower the front of the engine and fasten the motor mounts.



16. If so equipped, connect the emission line to the oil pan.

HEATER CORE | REMOVAL AND INSTALLATION
(See Figures 6 thru 11)

NOTE: On models equipped with air conditioning, access to the heater core will be more difficult.

1. Disconnect the negative battery cable. Drain the coolant from the radiator.



2. Disconnect the heater hoses at the engine firewall. Note how the hose clamps are installed so that they may be reinstated the same way.



3. Disconnect the duct which runs between the heater box and the blower motor or, depending on the model, remove the crush pad and instrument panel pad from the dash. This wills be required on the 323, 626 and MX-6. (Refer to Section 10 for pad and panel removal.)
   
   On 1986-87 323s disconnect the center duct, located in front of the heater box. On 1988-89 323s, remove the floor cover under the heater unit.



4. If necessary, disconnect the defroster duct(s), and then set the controls to the DEF and HOT positions and disconnect the control cables if they are in the way. Unfasten all electrical connectors which are in the way.



5. Unfasten the retaining screws or clips that secure the halves of the heater box together, or remove the entire heater unit and separate the heater box for access to the heater core.

• Tune-up and routine maintenance
• Engine and overhaul procedures
• Cooling, heating and air-conditioning systems
• Fuel and exhaust systems
• Engine electrical systems
• Emissions control systems
• Transmission
• Brakes
• Suspension and steering systems
• Body
• Chassis electrical system
• Wiring diagrams