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
   Schedule of routine maintenance of the Nissan Maxima cars
   General information
   General information about settings and adjustments
   Check of levels of liquids
   Check of a condition of tires and pressure of their rating
   Check of level of liquid of the power steering
   Check of the ATF level of automatic transmission
   Replacement of motive oil and oil filter
   Check of a condition of seat belts
   Check of a state and replacement of brushes of screen wipers
   Check, service and charging of the rechargeable battery
   Check of a state, adjustment of effort of a tension and replacement of a driving belt
   Check of a state and replacement of the hoses located in a motive compartment
   Check of a condition of components of the cooling system
   Rotation of wheels
   Check of a condition of components of a power supply system
   Check of the brake system
   Check of a condition of components of system of production of the fulfilled gases
   Check of level of the RKPP gearbox oil
   Replacement of the filtering air cleaner element
   Replacement of the fuel filter
   Check of a state and replacement of spark plugs
   Check of a state and replacement of VV of candle wires, cover and runner of the distributor
   Check and replacement of the valve of system of the operated ventilation of a case (PCV)
   Service of the cooling system (depletion, washing and filling)
   Replacement of ATF of automatic transmission and main transfer
   Replacement of the RKPP gearbox oil
   Check of a condition of components of a suspension bracket and steering drive
   Check of a condition of the EGR valve
+ 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

Check of a state and replacement of spark plugs

Tools necessary at replacement of spark plugs

1 — the Candle head — Is equipped with the special elastic insert excluding a possibility of casual damage of the porcelain insulator at a candle reversing.
2 — the Dynamometer key — without being among obligatory tools, provides a reliable guarantee of correctness of effort of tightening of spark plugs.
3 — the Ratchet drive — Is used in a set with a candle head and a dynamometer key.

4 — the Extender — Depending on model and a complete set access to spark plugs can be limited by its auxiliary units in various degree therefore use of extenders of the corresponding form and design will allow to facilitate implementation of the procedure considerably.
5 — the Tool for measurement and correction of interelectrode gaps of spark plugs — Is issued several types of this sort of tools — make sure that the tool is completed with the probe corresponding by the size to gaps of candles of your car.


If original candles after check of a state are established on the engine again, they have to be rolled strictly in former cylinders, make the corresponding marking.

1. In most cases replacement of spark plugs requires existence of a special candle head (with an elastic insert inside) complete with the ratchet drive, and also a set of extenders of the drive of a key and the device for check and correction of interelectrode gaps. For a safe detachment of tips of VV of wires from shafts of spark plugs the special tool is also issued though its application and is not strictly obligatory. Use of a dynamometer key will allow to achieve the correct effort of tightening of candles.
2. It is the most correct to keep constantly in the car a set of replaceable spark plugs with the correct image the adjusted interelectrode gap. Upon purchase of new candles you watch that they met for the parameters the requirements of the engine of your car. Necessary information is provided in Specifications to the present Chapter, and also on VECI label fixed under a cowl (in case of discrepancies preference should be given to information with VECI).
3. Start a reversing of candles only after full cooling of the engine. Not to waste in vain time, use a pause for check of a condition of a replaceable set.
4. The interelectrode gap of a candle is checked by introduction to it of the corresponding probe of the measuring instrument and has to conform to the requirements given on VECI label (see also Specifications). The probe has to with an easy resistance slip between side and central electrodes of a candle. Correction of a gap can be made by means of the special adaptation which is usually a part of the measuring instrument - turn in appropriately side electrode of a candle.

5. If the side electrode is located not precisely over central, correct its situation as appropriate. Make sure of lack of cracks and other damages to the porcelain insulator of a candle. Existence of any sort of defects of the insulator is inadmissible.

6. On models 1993 and 1994 of of the issue in order to avoid confusion at assembly before a detachment mark VV candle wires. Disconnect VV a wire from a spark plug of the first cylinder. Pull only for a tip, and not for a wire at all! It will be reasonable to use the special tool.

7. In the presence of near at hand source of compressed air, use it for removal of garbage from candle niches of the engine (the ordinary bicycle pump will be suitable for this purpose also not worse).

When using compressed air do not forget to put on goggles!

8. Turn out spark plugs.

In order to avoid confusion with connection of wires/coils, you make replacement of each of candles serially.

9. Verify the turned-out candle with the ID card given below that will allow to estimate the general condition of the engine qualitatively.

Coal deposits

Symptoms: Availability of soot indicates reenrichment of fuel-air mix or weak intensity of a spark. Causes admissions of ignition, complicates start and results in instability of operation of the engine.
Recommendations: Whether check the air cleaner is hammered whether fuel level in the float-operated camera is not too high, whether the air gate is jammed and whether contacts are not too worn-out. Try to use candles with longer insulator that increases the resilience to pollution.

Normal state of a candle

Symptoms: Gray-brown color and easy wear of electrodes. The Kalilny number of candles corresponds to type of the engine and its general state.
Recommendations: When replacing candles establish candles of the same type.


Symptoms: Oiling of a candle is caused by wear of maslootrazhatelny caps. Oil gets to the combustion chamber through worn-out guides of valves or piston rings. Causes admissions of ignition, complicates start and results in instability of operation of the engine.
Recommendations: Perform mechanical recovery work and replace candles.


Symptoms: Soft deposits of brownish color on one or both electrodes of a candle. A source of their education are the applied additives to oil and/or fuel. Excessive accumulation can lead to isolation of electrodes and cause admissions of ignition and unstable operation of the engine at acceleration.
Recommendations: At bystry accumulation of deposits change maslootrazhatelny caps that will prevent hit of oil in combustion chambers. Try to replace fuel brand.


Symptoms: Porous, white insulator, erosion of electrodes and lack of any deposits. Leads to reduction of service life of a candle.
Recommendations: Check whether the kalilny number of the established candles conforms to requirements of Specifications, whether the ignition advancing corner is correctly exposed, whether too poor fuel-air mix moves, whether there is no leak of vacuum of the inlet pipeline and whether valves are jammed. Check also the level of a cooler and whether the radiator is corked.


Symptoms: A rounding off of electrodes with a small congestion of deposits on the working end. Color is normal. Leads to difficulty of start of the engine in cold damp weather and to increase in fuel consumption.
Recommendations: Change candles on new, the same type.

Too early ignition

Symptoms: Electrodes are melted off. The insulator has white color, but maybe is polluted owing to admissions of ignition or hit in combustion chambers of foreign particles. Can lead to an engine exit out of operation.
Recommendations: Check kalilny number of the established candles, an ignition advancing corner, quality of mix (whether it is not too grown poor) whether the cooling system is corked and whether the lubrication system normally functions.


Symptoms: Insulators can be chopped off or burst. Also inaccurate technology of adjustment of a candle gap can lead to damage of the insulator. Can lead to damage of pistons.

Electroconductive luster

Symptoms: The insulator has yellowish color and the polished appearance. Speaks about sudden temperature increase in combustion chambers at sharp acceleration. Usual deposits at the same time are melted off, taking a form of a varnish covering. Leads to admissions of ignition at high speeds of the movement.
Recommendations: Replace candles (colder, at preservation of a manner of driving).


Symptoms: After admissions of ignition during a long period of adjournment can be loosened at preservation of working temperature in the combustion chamber. At high speeds of adjournment in flakes come off the piston and stick to the hot isolation center, causing admissions of ignition.
Recommendations: Replace candles or smooth out and establish into place old.

Short circuit of electrodes

Symptoms: Waste of products of combustion gets to interelectrode space. Firm deposits accumulate, forming a crossing point between electrodes. Leads to refusal of ignition in the cylinder.
Recommendations: Remove deposits from interelectrode space.

Mechanical damages

Symptoms: Can be caused by hit of foreign materials in the combustion chamber or arise at blow of the piston about too long candle. Lead to refusal of functioning of the cylinder and to damage of the piston.
Recommendations: Remove foreign particles from the engine and/or replace

10. Before rolling new candles, slightly grease their carving part with the anti-taking sealant. Manually acquire one of new candles in the corresponding opening in the engine. Having made sure that the candle is not warped in a carving, tighten it with the required effort (in the presence of near at hand dynamometer key). For simplification of the procedure of a nazhivleniye of a candle pull a piece of a flexible fuel hose on its shaft. At the same time the probability of failure of a carving as at the slightest zakusyvaniye the hose will begin to be turned simply is excluded.

11. On models 1993 and 1994 of of the issue connection of VV of a wire to a candle is carried out by rotary progress of its tip, - the last has to sit down on a candle shaft densely. The individual candle coils used on release models since 1995 are equipped with own short candle wires, - at installation just densely put assembly on the candle, without rotating it on a shaft of the last.
12. Repeat the procedure for the remained spark plugs, performing all operations serially in order to avoid violation of an order of ignition.