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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)
Introduction
Specifications
Repair work without dismantle of the engine from the vehicle
Engine Overhaul
Check Engine
Removing and installing engine
Preparation for a partition
ENGINE OVERHAUL
A partition and check of a head of cylinders
Valve Repair
Assembling the cylinder head
Removal of pistons and rods
Removing the crankshaft
Check and clean the cylinder
Honing cylinders
Check of pistons and rods
Checking crankshaft
Check of radical bearings and bearings of rods
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
Start the engine after repair and running
Bulkhead engine (2.0 liters and 2.5 V6)
The diesel engine of 2.0 liters
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Installation of pistons and rods



Checking the connecting rod bearing lubricant backlash

PERFORMANCE ORDER
1. Clean the upper bearing rod and attach it to the crank. Lubricating holes and insert a rod should be combined.
2. Clean the second loose leaf and establish it in a rod cover.

3. Place the piston ring end gaps as shown.
1. The clearance of the upper oil ring
2. The gap of the expansion ring
3. The clearance of the lower oil scraper ring
4. The gap of the upper compression ring
5. The piston pin
6. The gap of the second compression ring
4. Grease pistons and rings and compress piston rings using a piston ring compressor.
5. Turn the crankshaft so that the connecting rod bearing of the first cylinder was in the position of the lower dead point, and grease cylinder walls.
6. Check that the mark on top of the piston has been turned forward.
7. Push the plunger and install it into the cylinder.
8. For measurement of a lubricant backlash it is possible to take advantage of an internal micrometer or other special device, but the most accurate and easy method - is to use a special plastic measuring instrument.
9. After installing the piston into the cylinder, tighten bolts of covers of rods, and check the connecting rod bearing lubrication gap is similar to checking a lubricant backlash of radical bearings.
10. If the clearance is not correct, probably installed the wrong size inserts.

Final installation of pistons and rods

PERFORMANCE ORDER
1. Remove all traces of plastic. Make sure the surface of loose leaves was absolutely clean and lubricate with engine oil.
2. Install the connecting rod to the neck of the shaft, set the rod cover, and tighten the nut to the required torque.
3. Installation of other rods is similar.
4. After all the rods rotate the crankshaft several times and check the ease of movement.
5. Check the axial play of the connecting rods.




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Installing the crankshaft rear oil seal
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Start the engine after repair and running

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