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
   - DOHC 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
      Check and adjustment of gaps of valves
      Replacement of maslootrazhatelny caps and valvate springs with plates
      Removal, check of a state and installation of a chain and asterisks 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
   + 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 the oil pump

REMOVAL

 PERFORMANCE ORDER

1. Remove the main chain of the GRM drive with asterisks (see the Section Removal, check of a state and installation of a chain and asterisks of the GRM drive).

In case of need remove also assembly натяжителя / the directing secondary chain, having provided thereby adequate access to the pump.

2. Remove both sections of the pallet of a case of the engine (see the Section Removal and installation of the pallet of a case of the engine) and a maslozaborny tube.

3. Turn out bolts of fastening of the oil pump to a forward wall of the power unit.

4. Having accurately hooked, raise a casing of the pump and carefully remove it from the directing pins on the block.

CHECK

 PERFORMANCE ORDER

1. By means of the big screw-driver with a crosswise sting turn out screws of fastening of a forward cover of the oil pump.

2. Wash out internal components of assembly in solvent and attentively examine on existence of signs of excessive wear and mechanical damages.

3. Turn out a cap and take components of the reducing valve from a pump housing. Estimate a condition of working surfaces of the valve and its springs. In case of identification of defective components, replace all set.

1 — the Cap
2 — the Washer
3 — the External spring
4 — the Internal spring
5 — the Valve
6 — the Casing of the oil pump

4. By means of the probe of lezviyny type perform measurement of working gaps of gear wheels of the oil pump. Compare results of measurements to requirements of Specifications. During this check the following parameters have to be determined:

a) A gap between teeths of internal and external gear wheels;
b) A gap between the forming surface of an external gear wheel and the case;
c) Axial side play of landing of an internal gear wheel
d) Axial side play of landing of an external gear wheel;
e) A radial gap of landing of the acting stupichny part of an internal gear wheel in a pump housing (it is calculated by subtraction of results of two measurements.
At an exit any of parameters out of limits of admissible range assembly of the pump is subject to replacement.

5. Fill internal cavities of the pump technical vaseline. Enclose internal components in the case, establish a cover and strongly tighten screws of its fastening. Install into place carburetors of the reducing valve, strongly tighten a cap.

INSTALLATION

 PERFORMANCE ORDER

Assembly is made as it should be the return to a dismantle order. Do not forget to replace all sealing laying. Track. That lysk in a stupichny part of an internal gear wheel of the pump correctly entered gearing with reciprocal lyska on a pin of a bent shaft. Tighten all fixture with the required effort.

Before installing the case pallet, replace sealing rings in a casing of the pump and the block of the engine.