Mazda 626

1991-1998 of release

Repair and car operation



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 engine dismantle from the car
      + 3.4.4. Major maintenance of the engine
      3.4.5. Engine checks
      3.4.6. Removal and engine installation
      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 cranked 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 cranked 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 cranked shaft
      3.4.22. Installation of a back epiploon of a cranked shaft
      3.4.23. Installation of pistons and rods
      3.4.24. Engine start-up after repair and a running in
   + 3.5. Partition of engines (2,0 and 2,5 liters of V6)
   + 3.6. Diesel engine of 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 semi-axes
+ 9. Brake system
+ 10. Running gear
+ 11. Body
+ 12. Electric equipment
+ 13. Electroschemes
+ 14. Good advice



3.4.2. Technical characteristics

GENERAL INFORMATION

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

Engine displacement
1,6 l
1598 cm3
1,8 l
1840 cm3
Pressure of compression in the cylinder (300 rpm)
1,6 l:
  – the nominal
13,2 Bar
  – the minimum
9,3 Bar
  – the maximum difference in pressure between cylinders
1,9 Bar
1,8 l:
  – the nominal
12,8 Bar
  – the minimum
9,6 Bar
  – the maximum difference of pressure between cylinders
1,9 Bar
Pressure of oil (the engine is warmed up)
1,6 l and 1,8 l
2,0-2,9 Bar
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 the head adjacent to collector
0,15 mm
Valves and elements relating to them
Height of a head of the valve over a facet (minimum):
  – 1,6 l:
     • the inlet
0,9 mm
     • the final
1,0 mm
  – 1,8 l:
     • the inlet
0,850 mm
     • the final
0,925 mm
Diameter of a rod of the valve:
  – the inlet
5,970-5,985 mm
  – the final
5,965-980 mm
Gap between a rod of the valve and the directing plug:
  – the inlet
0,025-0,060 mm
  – the final
0,030-0,065 mm
  – maximum gap
0,20 mm
Springs of valves
Deviation limit from a right angle:
  – 1,6 l:
     • the inlet
1,61 mm
     • the final
1,50 mm
Length in a free condition:
  – 1,6 l:
     • the inlet
39,0 mm at least
     • the 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 a 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:
     • the nominal
0,028-0,068 mm
     • limiting wear
0,10 mm
Bearing loose leaves
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:
  – the nominal
0,018-0,036 mm
  – maximum wear
0,10 mm
Loose leaves 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)
Lateral gap of a rod:
  – the nominal
0,110-0,262 mm
  – maximum wear
0,30 mm
Free wheeling of a cranked shaft:
  – the 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:
  – the nominal
0,039-0,052 mm
  – maximum wear
0,15 mm
Trailer gap:
  – top kompressionny ring
0,15-0,30 mm
  – second kompressionny ring
0,15-0,30 mm
  – maslosjemny ring
0,20-0,70 mm
  – maximum wear
1,0 mm
Gap between a ring and a flute:
  – 1,6 l:
     • top kompressionny ring
0,030-0,070 mm
     • second kompressionny ring
0,030-0,070 mm
     • maximum wear
0,15 mm
  – 1,8 l:
     • top kompressionny ring
0,030-0,65 mm
     • second kompressionny 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.