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



Order of dismantling of the engine by preparation it to capital repairs

SOHC engine components

1 — the Axis of yokes of the drive of final valves
2 — the Direction forward on the right head
3 — the Direction forward on the left head
4 — the Axis of yokes of the drive of inlet valves
5 — the Axis of yokes of the drive of inlet valves
6 — the Cover of a head of cylinders
7 — Sealing laying
8 — Assembly of the directing pushers of valves
9 — the Bolt
10 — the Hydraulic pusher
11 — a valve drive Yoke
12 — M6 Bolt with a washer
13 — the Washer
14 — the Axis of yokes of the drive of final valves
15 — the Saddle of an internal spring
16 — Crackers of the cutting lock
17 — the Plate of valvate springs
18 — the External valvate spring

19 — the Internal valvate spring
20 — the Maslootrazhatelny cap
21 — the Directing plug
22 — a valve Saddle
23 — the Saddle of an external spring
24 — the Final valve
25 — the Bolt
26 — the Back cover of a head of cylinders
27 — Sealing laying of a back cover
28 — the Persistent plate of the camshaft
29 — the Left head of cylinders
30 — Sealing laying
31 — the Block of cylinders
32 — the Left camshaft
33 — the Forward epiploon of the camshaft
34 — the Right head of cylinders
35 — the Cover of a head of cylinders
36 — the Cover of a jellied mouth of motive oil


DOHC engine components

1 — the Cover of a jellied mouth of motive oil
2 — the Cover of a head of cylinders
3 — the Holder of camshafts
4 — the Camshaft
5 — the PCV Valve
6 — the Head of cylinders
7 — the Hose
8 — the Spark plug
9 — the Valve
10 — the Saddle of a valvate spring
11 — the Valvate spring
12 — the Plate of a valvate spring
13 — Crackers of the cutting lock

14 — a valve Pusher
15 — the Adjusting washer
16 — the Washer
17 — the Sealing washer
18 — Sealing laying
19 — the Sealing washer
20 — the Washer
21 — the Sealing washer
22 — Sealing laying
23 — the Maslootrazhatelny cap
24 — Sealing laying
25 — the Maslootrazhatelny cap
26 — Sealing laying


 PERFORMANCE ORDER

1. It is the simplest to carry out dismantling of the engine, having installed it on the portable assembly stand. Such adaptation can always be borrowed rather cheap in a workshop of car service. Before fixing the engine at the stand, it is necessary to remove from it a flywheel / a driving disk.
2. If an opportunity to use the stand is absent, dismantling should be made, having placed the engine on a strong workbench, or having reliably arranged it on a firm floor of a garage. During the work without stand you watch that the engine incidentally did not overturn.
3. If it is planned to make replacement of the engine by restored, remove with old all hinged units and external components and transfer them to the replaceable block. In number such, subject to shift, components enter:

a) The generator with arms;
b) Components of systems of decrease in toxicity of the fulfilled gases;
c) The distributor of ignition, candle and candle wires - SOHC engines
d) The thermostat with a casing cover;
e) Water pump;
f) Components of system of injection (EFI);
g) Inlet pipeline and final collectors;
h) Oil filter
i) Support of a suspension bracket of the power unit;
j) Flywheel / driving disk;
k) A back plate of the engine - SOHC engines;
l) Holder of a back epiploon of a bent shaft.

At removal from the old engine of external components try to remember characteristics of their installation. Fix landing provisions of laying, epiploons, remote rings and plugs, pins, arms, washers, bolts and other fine details in a notebook.

4. At the choice of the scheme with use of the reduced set of the block consisting of the block of cylinders with established in it by a bent shaft and conrod and piston groups remove from the old unit also heads of cylinders, the pallet of a case and the oil pump (possible alternatives of schemes of performance of capital repairs see in the Section Alternative versions of schemes of recovery repair of the engine).
5. When carrying out complete capital repairs of the old unit, make its dismantling and take all internal components. The optimum order of implementation of the procedure of dismantling of the engine is given below:

SOHC engines


a) Covers of heads of cylinders;
b) Assemblies of yokes with axes;
c) Pushers of valves with assembly of guides;
d) GRM drive covers with bolts;
e) The GRM drive (a gas-distributing belt with cogwheels);
f) Heads of cylinders;
g) Camshafts;
h) The pallet a case with a maslozabornik;
i) Oil pump;
j) Conrod and piston assemblies;
k) Bent shaft and radical bearings;

DOHC engines


a) Covers of heads of cylinders;
b) Stamped section of the pallet of a case;
c) Aluminum cast section of the pallet of a case;
d) Forward cover of the GRM drive;
e) GRM drive components (main and secondary chains with asterisks);
f) Back cover of the GRM drive;
g) Camshafts with pushers of valves;
h) Heads of cylinders;
i) The oil pump with a maslozabornik;
j) Conrod and piston assemblies;
k) Bent shaft and radical bearings.
6 Before starting dismantling of the engine, prepare the following necessary materials and tools (see also Section Engine Assembly Order):
a) Standard set of the metalwork tool;
b) A set of cardboard or plastic containers / plastic bags for organized storage of small components;
c) A scraper for cleaning of the interfaced pro-masonry surfaces;
d) A vertical drill for removal of step wear in the top part of cylinders;
e) A stripper for dismantle of a damper of tortional fluctuations;
f) Set of micrometers;
g) Telescopic nutromer;
h) Dial measuring instrument of plunger type (DTI);
i) The tool for compression of valvate springs;
j) Hon for processing of mirrors of cylinders;
k) The tool for a clearing of flutes under installation of piston rings;
l) Electric drill;
m) Set of taps and lerok;
n) Wire brushes;
o) Cylindrical brushes for a clearing of oil galleries;
p) Solvent.