Nissan Maxima QX

since 1993 of release

Repair and car operation

Nissan Maxima QX
+ Nissan Maxima brand Cars
+ Maintenance instruction
+ Settings and routine maintenance
- Engine
   + SOHC Engines
   + DOHC Engines
   - General major maintenance of the engine
      General information
      Check of pressure of oil
      Check of kompressionny pressure in cylinders
      Diagnostics of a condition of the engine with use of the vacuum gage
      Alternative versions of schemes of regenerative repair of the engine
      Removal of the power unit from the car - preparation and precautionary measures
      Removal and engine installation
      Order of dismantling of the engine by its preparation for major maintenance
      Dismantling of a head of cylinders
      Cleaning and check of a condition of a head of cylinders
      Service of valves
      Assembly of a head of cylinders
      Removal of shatunno-piston assemblies
      Removal of a cranked shaft
      Cleaning of the block of the engine
      Check of a condition of the block
      Honingovaniye of mirrors of cylinders
      Check of a condition of components of shatunno-piston group
      Check of a condition of a cranked shaft
      Check of a condition and selection of loose leaves of radical and shatunny bearings of a cranked shaft
      Check of a condition of camshafts, pushers of valves and bearings
      Engine assembly order
      Installation of piston rings
      Installation of a cranked shaft and check of working gaps of radical bearings
      Installation of a back epiploon of a cranked shaft
      Installation of shatunno-piston assemblies and check of size of working gaps in shatunny bearings of a cranked shaft
      Trial start and engine running in after major maintenance
+ Systems of cooling, heating
+ Power supply system and release
+ engine Electric equipment
+ Control systems of the engine
+ Transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment


Installation of piston rings


1. Before installation of new piston rings it is necessary to check gaps in their locks. It is meant that lateral gaps of landing of rings in flutes of pistons are already checked and correspond to the accepted norms (see. Section Check of a condition of components of shatunno-piston group).
2. Spread out shatunno-piston assemblies with sets of rings on a working surface of a workbench. From this point each set of rings will be rigidly adhered" to the piston. Now it is possible to start measurement of gaps in locks of rings.

3. Fill top (No. 1) a kompressionny ring in the first cylinder of the engine and level it perpendicularly, having pushed down the piston bottom. The ring should appear around the bottom border of a working course of rings in the cylinder.

4. Define gap size in the ring lock with the help щупа lezviyny type. The edge (I) щупа should slip hardly in the lock. Compare result of measurement to requirements of Specifications. If the size of a gap leaves in this or that party out of limits of an admissible range before undertaking any actions on situation correction (see below), once again make sure that did not mix a ring.

5. If the gap is too small, it is possible to expand it with a way of boring by a file with small tooth. Clamp a rectangular file in a vice, then put on a ring the lock a file so that the end of the last appeared in a circle. Slowly pull a ring on itself, removing excess of metal from its end faces in the lock. Having reached till the file end, remove a ring, again check a gap, in case of need repeat procedure.

At all do not push a ring from itself on a file as thus edges of the lock will meet, and the risk of destruction of metal is great.

6. The excessive size of a gap is not a crime if does not exceed value of 1.02 mm. Once again make sure that the acquired sets of rings meet according to the characteristics to requirements of the engine of your car.
7. Repeat procedure for the remained rings (the second kompressionny and maslosjemny) the piston of the first cylinder, then for rings of all other pistons. Remember that now each set of rings "is unequivocally adhered" to the piston on which it should be established.
8. Having checked and having modified properly gaps in locks of rings, it is possible to start their putting on on the pistons.
9. The first on the piston the maslosjemny (bottom) ring puts on. Maslosjemnoye a ring consists of three separate sections. At first fill in the bottom flute of the piston a spring dilator. If the dilator is equipped with an antirotational uvula, track, that the last got to reciprocal drilling in a piston flute. Now establish in a flute the bottom working section of a ring. In order to avoid casual damage of working sections of a maslosjemny ring do not use for their installation any tool, - simply get in a flute under/over a dilator at first one end of section, densely press it a finger and, moving on ring perimeter, fill the rest. In the last turn the top working section of a ring is established.

10. Having planted in the bottom flute of the piston all three components of a maslosjemny ring, check freedom of rotation (sliding in a flute) the top and bottom working sections.
11. The second (bottom) kompressionny ring is established to the following. The ring should be established by marking up (to the piston bottom).

Strictly follow instructions of manufacturers of rings which are usually printed on set packing. Do not mix the second kompressionny ring with first (top) - they have various cross-section section.

12. Having used a special dilator and having tracked, that the ring was turned by marking up, plant it in an average flute on the piston. Try not to plant the ring lock more than it is really necessary for its free putting on on the piston.

13. Operating in a similar manner, establish the first (top) kompressionny ring (marking up). Try not to mix the top ring with the second.
14. Operating in a similar manner, serially complete with rings all remained pistons.