Nissan Maxima QX

since 1993 release

Repair and operation of the car


Nissan Maxima QX
+ Cars of the Nissan Maxima brand
+ Maintenance instruction
+ Settings and routine maintenance
- Engine
   - SOHC engines
      General information
      Preparatory actions and the list of repair procedures which can be executed without extraction of the engine from the car
      Reduction of the piston of the first cylinder in the provision of the top dead point (TDP)
      Removal and installation of covers of heads of cylinders
      Removal, check of a state and installation of assembly of yokes
      Replacement of maslootrazhatelny caps and valvate springs with plates
      Removal and installation of a gas-distributing belt and cogwheels of the GRM drive
      Removal and installation of camshafts and pushers of valves
      Removal and installation of the inlet pipeline
      Removal and installation of final collectors
      Removal and installation of heads of cylinders
      Removal and installation of a pulley of a bent shaft
      Replacement of a forward epiploon of a bent shaft
      Removal and installation of the pallet of a case of the engine
      Removal, check of a state and installation of the oil pump
      Removal and installation of a flywheel / driving disk
      Replacement of a back epiploon of a bent shaft
      Check of a state and replacement of support of a suspension bracket of the power unit
   + DOHC engines
   + General capital repairs of the engine
+ Cooling systems, 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

Removal, check of a state and installation of assembly of yokes

REMOVAL

 PERFORMANCE ORDER

1. Uncover heads of cylinders (see the Section Removal and installation of covers of heads of cylinders).

2. Moving from the ends to the middle, in two-three receptions weaken bolts of fastening of axes of yokes.

Part of valves when weakening fixture of axes of yokes will remain open in view of what axes will be affected by the efforts developed by valvate springs, and the sharp otpuskaniye of fixing bolts can lead to deformation of components.

3. Before extraction of assemblies of yokes from their engine it is necessary to mark accurately.

4. Turn out the weakened fixing bolts and serially take from a head of assembly of axes with yokes. Lay the removed assemblies on a workbench, having arranged them the same as they were installed in the engine. At assembly all axes have to be established strictly on former places in the heads of cylinders. Pay attention that axes with deep selections are established from the inlet pipeline, with small - from final collectors.

CHECK

 PERFORMANCE ORDER

1. Having removed assemblies of yokes, it will be reasonable to sort them for the purpose of more detailed studying of a condition of components. Carefully clear details and check them for existence of signs of wear and damages. Estimate a condition of the surfaces of yokes contacting to the camshaft. Check for existence of zadir and signs of excessive wear of a surface of landing of yokes on axes, and also walls of landing openings of yokes. Defective components are subject to replacement.

2. Measure outer diameters of necks of axes of yokes. Write down results of measurements and compare them to requirements of Specifications.

3. Measure internal diameters of landing openings of yokes. Also compare results to requirements of Specifications.

4. By subtraction of results of the first measurements of results of the second determine the size of landing gaps of yokes on axes. Compare results of calculations to requirements of Specifications. In case of need replace excessively worn-out components.

INSTALLATION

 PERFORMANCE ORDER

Installation is made upside-down. Tightening of bolts of fastening of axes of yokes with the required effort should be made in several stages in the direction from the ends of assemblies to their centers.