Mitsubishi Galant

1990-2001 of release

Repair and car operation

Check of a condition and replacement of spark plugs

The tools necessary at replacement of spark plugs

1 — the Candle head - Is equipped by the special elastic loose leaf excluding possibility of casual damage of a porcelain insulator at a reversing of a candle.
2 — the Dinamometrichesky key - not entering into number of obligatory tools, provides a reliable guarantee of correctness of effort of a tightening of spark plugs.
3 — the Ratchet drive - Is applied in the complete set with a candle head and динамометрическим a key.

4 — the Extension piece - Depending on model and a complete set access to spark plugs can be limited by its auxiliary units in various degree, therefore application of extension pieces of the corresponding form and a design will allow to facilitate procedure performance appreciably.
5 — the Adaptation for measurement and updating of interelectrode backlashes of spark plugs - Is issued some types of a similar sort of tools - make sure, that the tool is completed щупом, to backlashes of candles of your car corresponding on the size.

If original candles after condition check are established again on the engine, they should be rolled strictly in former cylinders, - make corresponding marks.

The general information

The spark plug is the metal cover framing a ceramic (porcelain) insulator. In an axial part of an insulator the vertical channel in which is provided the probe of the central electrode is filled. The top part of the probe is connected to the carving tip rolled in the top part of an insulator, bottom acts from below, forming a working part of an electrode. The lateral electrode is welded directly on metal of a cover of candle assemblage and, being bent under 90 ° leaves to the central part of the bottom face surface of a candle, settling down directly over an end face of a working part of the central electrode. The air backlash, образуемый between two electrodes has received the name interelectrode and is one of the main, working parametres of a candle. The backlash size should be exposed strictly according to the standard requirements defined by types of candles and the engine. At giving on candle ВВ of pressure (20 ч 50 кВ) from the ignition coil in between electrodes the spark providing ignition of an air-fuel mix in the chamber of combustion of the engine is formed. Intensity искрообразования actually also is defined by size of an interelectrode backlash.

One more of основоопределяющих parametres of any candle is it калильное number. Калильное the number defines ability of a candle to heat dispersion. Than more long the bottom carving part of a cover of a candle (the more deeply electrodes in the combustion chamber refuel), the will be hot its working temperature. Installation on the engine of excessively "cold" spark plugs leads to fast formation on their electrodes of oil and coal adjournment, finally, that leads to occurrence of admissions of ignition. Use of too "hot" candles can lead to the problems connected with уками of a corner of an advancing of ignition (too early ignition), besides, there can be a diesel engine-effect when the engine continues to work during even some time after ignition deenergizing. The following rule is usually applied: At trips on a long distance with high speeds of movement it is necessary to apply colder candles, for car operation in a mode of the intense city cycle characterised by frequent short trips more "hot" candles approach. The best compromise is always reached at use of the original spark plugs, recommended manufacturer of the car (Specifications see).

Check and adjustment

PERFORMANCE ORDER

During normal operation of the car the size of an interelectrode backlash of spark plugs increases on the average by 0.025 mm on each 4000 km of runaway that conducts to gradual decrease in intensity искрообразования. Spends adjustment/replacement of candles strictly according to the Schedule of routine maintenance of the car (see Has undressed the Schedule of routine maintenance of cars Mitsubishi Galant/Mirage/Diamante).

1. In most cases for replacement of spark plugs presence of a special candle head (with the elastic loose leaf inside) complete with a ratchet drive, and also a set of extension pieces of a drive of a key and the adaptation for check and updating of interelectrode backlashes is required. For a safe detachment of tips ВВ of wires from shafts of spark plugs the special tool though its application and is not strictly obligatory also is issued. Use динамометрического a key will allow to achieve correct effort of a tightening of candles.
2. Most correctly constantly to hold in the car the complete set of replaceable spark plugs with correct image the adjusted interelectrode backlash. At purchase of new candles watch that they met on the parametres to requirements of the engine of your car. The necessary information is led in Specifications to the present Chapter, and also on label VECI fixed under a cowl (in case of different interpretations preference it is necessary to give information with VECI).
3. Start a reversing of candles only after full cooling of the engine. Not to waste in vain time, take advantage of a pause for check of a condition of the replaceable complete set. Attentively examine new candles, - at revealing of the slightest cracks in an insulator the corresponding candle should be rejected. Measure size of interelectrode backlashes of the new complete set (see further).
4. The interelectrode backlash of a candle is checked by introduction in it corresponding щупа a measuring instrument and should correspond to the requirements resulted in specifications/on label VECI. A demanded thickness щуп should with easy resistance slip between lateral and central candle electrodes. Backlash updating can be made by means of the special adaptation which are usually a part of a measuring instrument - turn in in appropriate way a lateral electrode of a candle.

5. If the lateral electrode appears is located not precisely over central, correct its position by appropriate amount. Make sure of absence of cracks and other damages to a porcelain insulator of a candle. Presence of any sort of defects of an insulator is inadmissible.

Removal and installation

PERFORMANCE ORDER

1. In order to avoid infringement of an order of ignition at electroconducting connection it is necessary to make service of each of candles in an individual order.
2. Wait full cooling of the engine. Disconnect a negative wire from the battery.

If the stereosystem established on the car is equipped by a security code before to disconnect the battery make sure that have a correct combination for audiosystem input in action!

3. At a corresponding complete set remove the central cover. On l models 3.0 (engines SOHC and DOHC) and 3.5 l for the purpose of providing of access to spark plugs of a back row of cylinders are necessary to remove the top section of the inlet pipeline (the Engine see the Head).

4. Disconnect ВВ a wire from a spark plug of the first cylinder, - pull only for a tip, and at all for a wire! It will be reasonable to take advantage of the special tool.

5. At presence near at hand a source of compressed air, take advantage of it for removal of dust from candle niches of the engine (for this purpose also the usual bicycle pump not is worse will approach).

At use of compressed air do not forget to put on goggles!

6. Turn out a spark plug by means of a face key with special, equipped with the rubber loose leaf, a candle head (in case of need in a candle niche a little getting oil preliminary drips).

7. Verify the turned out candle with the identification card resulted on a photographic insert that will allow to estimate the general condition of the engine qualitatively. Also estimate a condition of tips ВВ of wires, replace defective components.
8. Before to roll new candles, slightly grease their carving part with antitaking hermetic. Manually acquire one of new candles in a corresponding aperture in the engine. Having made sure, that the candle is not warped in a carving, tighten it with demanded effort (at presence near at hand динамометрического a key). For simplification of procedure наживления candles pull on its shaft a piece of a flexible fuel hose. The probability of failure of a carving as at the slightest закусывании the hose will start to be turned simply is thus excluded.
9. Vrashchatelno-progress plant tip ВВ of a wire on a spark plug shaft.

Before to connect to candles ВВ of a wire estimate their condition.

10. Repeat procedure for the remained spark plugs, carrying out all actions serially in order to avoid infringement of an order of ignition.
11. Establish into place all components acting in film for the purpose of providing of access.

Coal adjournment

Symptoms: soot Presence specifies in reenrichment of a toplivno-air mix or weak intensity of a spark. Causes ignition admissions, complicates start and leads to instability of work of the engine.

Recommendations: whether Check up the air cleaner is hammered, whether fuel level in поплавковой to the chamber is not too high, whether is jammed air заслонка and whether contacts are not too worn out. Try to use candles with longer insulator that raises resistibility to pollution.

Normal condition of a candle

Symptoms: Gray-brown colour and easy deterioration of electrodes. Калильное the number of candles corresponds to type of the engine and its general condition.

Recommendations: At replacement of candles establish candles of the same type.

Замасливание

Symptoms: Замасливание candles it is caused by deterioration маслоотражательных caps. Oil gets to the combustion chamber through worn out directing valves or piston rings. Causes ignition admissions, complicates start and leads to instability of work of the engine.

Recommendations: Make mechanical regenerative works and replace candles.

Пеплообразование

Symptoms: Soft brownish colour of adjournment on one or both electrodes of a candle. A source of their formation are applied additives to oil and-or fuel. Excessive accumulation can lead to isolation of electrodes and cause admissions of ignition and astable work of the engine at acceleration.

Recommendations: At fast accumulation of adjournment change маслоотражательные caps that will prevent oil hit in combustion chambers. Try to replace fuel mark.

Overheat

Symptoms: the Porous, white insulator, erosion of electrodes and absence of any adjournment. Leads to reduction of service life of a candle.

Recommendations: whether Check up corresponds to requirements of Specifications калильное number of the established candles, whether the corner of an advancing of ignition is correctly exposed, whether too poor toplivno-air mix moves, whether there are no leaks of vacuum of the inlet pipeline and whether valves are jammed. Check up as level of a cooler and whether the radiator is corked.

Deterioration

Symptoms: the Rounding off of electrodes with a small congestion of adjournment on the working end. Colour normal. Leads to difficulty of start of the engine in cold damp weather and to increase of the expense of fuel.

Recommendations: Change candles on new, the same type.

Too early ignition

Symptoms: Electrodes are melted off. The insulator has white colour, but can be and is polluted owing to admissions of ignition or hit in chambers of combustion of extraneous particles. Can lead to an engine exit out of operation.

Recommendations: Check up калильное number of the established candles, a corner of an advancing of ignition, quality of a mix (whether it is not too impoverished), whether the system of cooling is corked and whether the greasing system normally functions.

Detonation

Symptoms: Insulators can appear chopped off or треснутыми. The inaccurate technics of adjustment of a candle backlash can result In insulator damage also. Can lead to damage of pistons.

Electrospending luster

Symptoms: the Insulator has yellowish colour and the polished kind. Speaks about sudden rise in temperature in combustion chambers at sharp acceleration. Usual adjournment are thus melted off, taking a form of a varnish covering. Leads to ignition admissions at high speeds of movement.

Recommendations: Replace candles (colder, at preservation of a manner of driving).

Забрызгивание

Symptoms: After admissions of ignition during a long time interval 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 a hot insulator, causing ignition admissions.

Recommendations: Replace candles or smooth out and establish into place the old.

Short circuit of electrodes

Symptoms: the Waste of products of combustion gets to interelectrode space. Firm adjournment accumulate, forming a crosspiece between electrodes. Leads to ignition refusal in the cylinder.

Recommendations: Remove adjournment from interelectrode space.

Mechanical damages

Symptoms: Can be caused hit of extraneous materials in the chamber of combustion or arise at piston blow about too long candle. Lead to refusal of functioning of the cylinder and to piston damage.

Recommendations: Remove from the engine extraneous particles and-or replace.