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
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Order of dismantling of the engine by its preparation for major maintenance

SOHC engine components

1 — the Axis of yokes of a 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 a drive of inlet valves
5 — the Axis of yokes of a drive of inlet valves
6 — the Cover of a head of cylinders
7 — Sealing laying
8 — Assembly of directing pushers of valves
9 — the Bolt
10 — the Hydraulic pusher
11 — the Yoke of a drive of the valve
12 — Bolt М6 with a washer
13 — the Washer
14 — the Axis of yokes of a drive of final valves
15 — the Saddle of an internal spring
16 — Crackers of the cutting lock
17 — the Plate of klapanny springs
18 — the External klapanny spring

19 — the Internal klapanny spring
20 — Maslootrazhatelny a 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 a camshaft
29 — the Left head of cylinders
30 — Sealing laying
31 — the Block of cylinders
32 — the Left camshaft
33 — the Forward epiploon of a camshaft
34 — the Right head of cylinders
35 — the Cover of a head of cylinders
36 — the Cover of a jellied mouth of impellent oil


DOHC engine components

1 — the Cover of a jellied mouth of impellent 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 klapanny spring
11 — Klapannaya a spring
12 — the Plate of a klapanny 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 — Maslootrazhatelny a cap
24 — Sealing laying
25 — Maslootrazhatelny a cap
26 — Sealing laying


 PERFORMANCE ORDER

1. It is simplest to carry out engine dismantling, having established it on the portable assembly stand. The such adaptation always can be borrowed rather cheaply in a car-care center workshop. Before fixing the engine at the stand, it is necessary to remove from it a flywheel / a driving disk.
2. If possibility 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 garage. At work without the stand watch that the engine casually did not overturn.
3. If it is planned to make replacement of the engine on restored, remove with old all hinged units and external components and transfer them on 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, a 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 cranked shaft.

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

4. At a scheme choice with use of the reduced set of the block consisting of the block of cylinders with established in it by cranked shaft and shatunno-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 major maintenance see in the Section Alternative versions of schemes of regenerative repair of the engine).
5. At carrying out complete major maintenance of the old unit, make its dismantling and take all internal components. The optimum order of performance of procedure of dismantling of the engine below is given:

SOHC engines


a) Covers of heads of cylinders;
b) Assemblies of yokes with axes;
c) Pushers of valves with assembly of the directing;
d) Covers of a drive of GRM with bolts;
e) 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) Shatunno-porshnevye assemblies;
k) Cranked 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 a drive of GRM;
e) Components of a drive of GRM (main and secondary chains with asterisks);
f) Back cover of a drive of GRM;
g) Camshafts with pushers of valves;
h) Heads of cylinders;
i) The oil pump with a maslozabornik;
j) Shatunno-porshnevye assemblies;
k) Cranked shaft and radical bearings.
6 Before starting engine dismantling, prepare the following necessary materials and tools (see also Section an engine Assembly order):
a) Standard set of the metalwork tool;
b) A set of cardboard or plastic containers / plastic bags for the organized storage of small components;
c) A scraper for cleaning of interfaced prokladochny 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 krutilny fluctuations;
f) Set of micrometers;
g) Telescopic nutromer;
h) Tsiferblatny measuring instrument of plunzherny type (DTI);
i) The tool for compression of klapanny springs;
j) Hon for processing of mirrors of cylinders;
k) The tool for pro-cleaning of flutes under installation of piston rings;
l) Electrodrill;
m) Set of taps and lerok;
n) Wire brushes;
o) Cylindrical brushes for pro-cleaning of oil galleries;
p) Solvent.