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

3.4.14. Check and cleaning of the block of cylinders


1. Examine the block on existence of cracks and corrosion or rust traces. Examine carvings of openings of the block. At detection of defects, it is necessary to repair or replace the block whenever possible.
2. Examine cylinders.
3. Measure diameter of the cylinder perpendicular to the central line (And) and parallel to the central line (In).
4. Measure diameter of the cylinder by a measuring instrument.
5. Measure length of a measuring instrument by a micrometer.
6. Measure diameter of each cylinder in the top, average and bottom its parts, parallel to an axis of a cranked shaft.
7. Measure diameter of each cylinder in the top average and bottom its parts, perpendicular to an axis of a cranked shaft.
8. The Konusnost of the cylinder is calculated as a difference between top and bottom in diameters. Ovality – as a difference between parallel and perpendicular measurements.
9. If the received results do not coincide with technical requirements, address to experts.
10. By means of a ruler and щупов check, whether the surface of the block which is joining to a head is deformed.
11. Check wear of pistons and cylinders with the help щупов. When finding wear or damages at block survey, address to experts.


1. Remove from the block of cylinders soft caps. For this purpose by means of a hammer and an opravka drown them in the block, and then get caps from openings, having picked up big flat-nose pliers.
2. Remove with a shpatel all remains of a material of laying from the block of cylinders, being careful not to damage a surface.
3. Remove covers of radical bearings and get bearings from the block and covers. Inscribe to what cylinder the bearing, and also a detail from which it belongs was taken (from a cover or the block of cylinders), put them separately from each other.
4. By means of special face six-sided keys (Allen's key) turn out and remove all carving caps of channels of the block of cylinders.
5. If the engine is strongly polluted, it is necessary to hand over it in a car-care center workshop for washing by a strong stream or in the hot chamber. Almost in all autoshops on sale there are brushes for pro-cleaning of oil channels and openings. Wash out internal channels a stream of warm water until water does not become pure, carefully dry the block and oil the processed surfaces that will protect them from corrosion. If there is a compressed air, blow the block and internal channels for acceleration of process of drying.
6. If the block is polluted slightly, it is enough to wash out the block warm water with detergent and a rigid brush. Do not feel sorry for time and perform this work carefully. Irrespective of a way of washing very carefully clean oil channels and openings, dry the block and oil the processed surfaces.

7. Carving openings should be passed in the block a tap that will provide correctness of indications of the moment of an inhaling at assembly. Passing by a tap will allow to clear carving openings of dirt, traces of corrosion and the hermetic remains, and also to restore a carving. At possibility blow openings a stream of the compressed air for removal of the remains of a material from passing by a tap.
8. Carefully clear carvings of bolts of fastening of a head of the block of cylinders, and also covers of radical bearings.
9. Again establish covers of radical bearings, bolts tighten by hand.

10. Establish in the block new caps, previously having greased them with high-temperature hermetic. Be convinced of correctness of landing of caps, in lack of distortions. otherwise leaks are possible.
11. For landing of caps it is required the special tool, however this operation it is possible to execute with identical quality by means of an opravka which diameter corresponds to a cap opening, and a hammer.
12. If engine assembly is not made at present, cover the block of cylinders with a plastic cover that will protect it from pollution.