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REPAIR MAINTENANCE OPERATION OF MOTOR VEHICLES
Mazda 626 (from 1991 to 1998, the year of issue)

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Mazda 626
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Mazda
626
Instructions
Maintenance
Engines
Petrol engines (1,6 and 1,8 liters)
Gasoline 4-cylinder engine (2 liters)
Gasoline engine V6 (2,5 liters)
A partition of engines (1,6 and 1,8 liters)
Bulkhead engine (2.0 liters and 2.5 V6)
Introduction
Specifications
Repair work without dismantle of the engine from the vehicle
Engine Overhaul
Check with a vacuum gauge
Compression Test
Methods for removing the motor
Removing and installing engine
ENGINE OVERHAUL
A partition and check of a head of cylinders
Valves
Assembling the cylinder head
Removal of pistons and rods
Removing the crankshaft
Checking cylinder
Honing cylinders
Check of pistons and rods
Checking crankshaft
Check and selection of radical bearings and bearings of rods
Check the camshaft and pushers
The order of assembly of the engine
Installation of the piston rings
Installing the crankshaft
Installing the crankshaft rear oil seal
Installation of pistons and rods
The diesel engine of 2.0 liters
Systems of an electric motor
Heating and ventilation
Fuel system
An exhaust system
Transmissions
Coupling and semiaxes
The brake system
Chassis
Body
Electrical
Wiring
Tips and Tricks
 


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Checking crankshaft



PERFORMANCE ORDER
1. Clean crankshaft solvent and dry it with compressed air.
2. Inspect the crankshaft bearings for signs of wear, scratches, corrosion or cracks.
3. Remove the bulges around the oil holes and clean the holes with solvent.
4. Inspect the crankshaft for cracks or other damage.
5. Measure the diameters of the main and connecting rod bearings. To identify the taper and ovality, measure the diameter of each of the bearing at several points. If necessary, the crankshaft to be treated in a specialized workshop.
6. Check the cervical glands of the crankshaft for signs of wear or damage. If the seals have wiped flutes on necks, the new seals will leak oil.
7. Measure the length of the thread of each bolt main bearing caps. In four-cylinder engines, bolt must be no longer than 67.5 mm, and a six-cylinder engine is not longer than 136 mm (long bolts) and 119 mm (short bolts), otherwise the screws must be replaced.




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Check of pistons and rods
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Check and selection of radical bearings and bearings of rods

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