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 capital repairs of the engine
      General information
      Check of pressure of oil
      Check of compression pressure in cylinders
      Diagnostics of a condition of the engine with use of the vacuum gage
      Alternative versions of schemes of recovery repair of the engine
      Removal of the power unit from the car - preparation and precautionary measures
      Removal and installation of the engine
      Order of dismantling of the engine by preparation it to capital repairs
      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 conrod and piston assemblies
      Removal of a bent 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 conrod and piston group
      Check of a condition of a bent shaft
      Check of a state and selection of inserts of radical and conrod bearings of a bent shaft
      Check of a condition of camshafts, pushers of valves and bearings
      Engine assembly order
      Installation of piston rings
      Installation of a bent shaft and check of working gaps of radical bearings
      Installation of a back epiploon of a bent shaft
      Installation of conrod and piston assemblies and check of size of working gaps in conrod bearings of a bent shaft
      Trial start and running in of the engine after capital repairs
+ 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

Check of pressure of oil


1. Pressure drop of oil can be considered as a sign that the engine needs recovery repair. The control lamp of pressure of oil is not among the diagnostic equipment controlling a condition of the lubrication system, and only informs the driver on dangerous decrease in oil pressure. Even the oil pressure measuring instrument which is built in the dashboard, despite a big detail of the issued information, can be considered only as the device of information character. For data acquisition about the oil pressure which then can be compared to requirements of Specifications it is necessary to use mechanical (not electric!) the manometer complete with an exact tachometer.
2. Find the oil pressure sensor switch block.

3. Remove the sensor switch and establish instead of it a transitional nozzle for connection of the mechanical manometer. For sealing of the threaded connection of a nozzle use a sealing tape from teflon, or the film FUM.
4. According to instructions of manufacturers connect an exact tachometer to the engine.
5. Check oil pressure at the engine which is warmed up up to the normal working temperature working at the turns stipulated in Specifications. Compare results of measurements to standard requirements. With excessively low pressure it is necessary to estimate degree of wear of bearings and/or the oil pump.