Mazda 626

1991-1998 of release

Repair and operation of the car



Mazda 626

+ 1. Maintenance instruction
+ 2. Maintenance
- 3. Engines
   + 3.1. Petrol engines (1,6 and 1,8 liters)
   + 3.2. Petrol 4-cylinder engine (2 liters)
   + 3.3. Petrol V6 engine (2,5 liters)
   - 3.4. Partition of engines (1,6 and 1,8 liters)
      3.4.1. Introduction
      3.4.2. Technical characteristics
      3.4.3. Repair work without dismantle of the engine from the car
      + 3.4.4. Capital repairs of the engine
      3.4.5. Checks of the engine
      3.4.6. Removal and installation of the engine
      3.4.7. Preparation for a partition
      3.4.8. Engine partition
      3.4.9. Partition and check of a head of cylinders
      3.4.10. Repair of valves
      3.4.11. Assembly of a head of cylinders
      3.4.12. Removal of pistons and rods
      3.4.13. Removal of a bent shaft
      3.4.14. Check and cleaning of the block of cylinders
      3.4.15. Honingovaniye of cylinders
      3.4.16. Check of pistons and rods
      3.4.17. Check of a bent shaft
      3.4.18. Check of radical bearings and bearings of rods
      3.4.19. Engine assembly order
      3.4.20. Installation of piston rings
      3.4.21. Installation of a bent shaft
      3.4.22. Installation of a back epiploon of a bent shaft
      3.4.23. Installation of pistons and rods
      3.4.24. Launch of the engine after repair and a running in
   + 3.5. Partition of engines (2,0 and 2,5 liters of V6)
   + 3.6. Diesel engine 2,0 liters
   + 3.7. Systems of electric equipment of the engine
+ 4. Heating and ventilation
+ 5. Fuel system
+ 6. Exhaust system
+ 7. Transmissions
+ 8. Coupling and half shafts
+ 9. Brake system
+ 10. Running gear
+ 11. Body
+ 12. Electric equipment
+ 13. Electrical circuitries
+ 14. Useful tips


3.4.2. Technical characteristics

GENERAL INFORMATION

The specifications given below are necessary only for check of technical condition of details in the procedures of repair described further.

Engine displacement
1,6 l
1598 cm3
1,8 l
1840 cm3
Compression pressure in the cylinder (300 rpm)
1,6 l:
  – nominal
13,2 Bar
  – minimum
9,3 Bar
  – the maximum difference in pressure between cylinders
1,9 Bar
1,8 l:
  – nominal
12,8 Bar
  – minimum
9,6 Bar
  – the maximum difference of pressure between cylinders
1,9 Bar
Oil pressure (the engine is warmed)
1,6 l and 1,8 l
2,0 – 2,9 Bars
Head of cylinders
Maximum deformation of a surface:
  – 1,6 l
0,15 mm
  – 1,8 l
0,10 mm
Deformation of a surface of a head adjacent to a collector
0,15 mm
Valves and elements relating to them
Valve head height over a facet (minimum):
  – 1,6 l:
     • inlet
0,9 mm
     • final
1,0 mm
  – 1,8 l:
     • inlet
0,850 mm
     • final
0,925 mm
Diameter of a rod of the valve:
  – inlet
5,970 – 5,985 mm
  – final
5,965 – 980 mm
Gap between a rod of the valve and the directing plug:
  – inlet
0,025 – 0,060 mm
  – final
0,030 – 0,065 mm
  – maximum gap
0,20 mm
Springs of valves
Deviation limit from a right angle:
  – 1,6 l:
     • inlet
1,61 mm
     • final
1,50 mm
Length in a free state:
  – 1,6 l:
     • inlet
39,0 mm at least
     • final
38,0 mm at least
  – 1,8 l
39,5 mm at least
Block of cylinders
Diameter of the cylinder:
  – 1,6 l:
78,006 – 78,013 mm
     • 1 size
78,256 – 78,263 mm
     • 2nd size
78,506 – 78,513 mm
  – 1,8 l:
83,006 – 83,013 mm
     • 1 size
83,256 – 83,263 mm
     • 2nd size
83,506 – 83,513 mm
Camshaft and rods
Diameter of bearings of the camshaft:
  – 1,6 l
19,943 – 19,961 mm
  – 1,8 l
20,003 – 20,014 mm
Bearings of rods:
  – diameter:
     • 1,6 l and 1,8 l
44,940 – 44,956 mm
  – ovality
0,05 mm
  – lubricant gap:
     • nominal
0,028 – 0,068 mm
     • extreme wear
0,10 mm
Bearing inserts
Diameter:
  – 1,6 l and 1,8 l:
     • 44,690 – 44,706 mm
0,25 mm
     • 44,440 – 44,456 mm
0,50 mm
     • 44,190 – 44,206 mm
0,75 mm
Radical bearings
Diameter
49,938 – 49,956 mm
Ovality
0,05 mm
Maximum wear
0,04 mm
Oil gap:
  – nominal
0,018 – 0,036 mm
  – maximum wear
0,10 mm
Inserts of bearings:
  – diameter:
     • 49,704 – 49,708 mm
0,25 mm
     • 49,454 – 49,458 mm
0,50 mm
     • 49,204 – 49,208 mm
0,75 mm (not for 1,6 l)
Side gap of a rod:
  – nominal
0,110 – 0,262 mm
  – maximum wear
0,30 mm
Free wheeling of a bent shaft:
  – nominal
0,080 – 0,282 mm
  – maximum wear
0,30 mm
Thickness of a persistent washer
2,500 – 2,925 mm
Ovality
0,019 mm
Pistons and piston rings
Diameter of the piston:
  – 1,6 l:
77,954 – 77,974 mm
     • 1 dimension
78,211 – 78,217 mm
     • 2nd dimension
78,461 – 78,467 mm
  – 1,8 l:
82,954 – 82,974 mm
     • 1 dimension
83,211 – 83,217 mm
     • 2nd dimension
83,461 – 83,467 mm
Gap between the piston and the cylinder:
  – nominal
0,039 – 0,052 mm
  – maximum wear
0,15 mm
Trailer gap:
  – top compression ring
0,15 – 0,30 mm
  – second compression ring
0,15 – 0,30 mm
  – oil scraper ring
0,20 – 0,70 mm
  – maximum wear
1,0 mm
Gap between a ring and a flute:
  – 1,6 l:
     • top compression ring
0,030 – 0,070 mm
     • second compression ring
0,030 – 0,070 mm
     • maximum wear
0,15 mm
  – 1,8 l:
     • top compression ring
0,030 – 0,65 mm
     • second compression ring
0,030 – 0,070 mm
     • maximum wear
0,15 mm

Moments of an inhaling, N. of m.

Bolts and nuts of covers of rods:
  – 1,6 l
47 – 52
  – 1,8 l
50 – 54
Bolts of covers of radical bearings
54 – 58
Oil jets
12 – 18

* For more information see subsection 3.1.2.



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