Subaru Legacy/Outback

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 adaptation 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 though its application and is not strictly obligatory is also issued. Use of a dinamometrichesky key will allow to achieve the correct effort of a tightening of candles.
2. It is most correct to keep constantly in the car a set of replaceable spark plugs with the adjusted interelectrode gap. Upon purchase of new candles 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 different interpretations the preference should be given 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. Attentively examine new candles, - at identification of the slightest cracks in an insulator the corresponding candle has to be rejected. Measure the size of interelectrode gaps of a new set (see further).

4 Interelectrode gap of a candle is checked by introduction to it of the corresponding probe of the measuring instrument and has to conform to standard requirements. The demanded thickness the probe has to with an easy resistance slip between lateral and central candle electrodes. 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 lateral electrode of a candle.

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

In order to avoid violation of an order of ignition at connection of an electrical wiring it is necessary to make an obsla chewing of each of candles in an individual order.

1. Disconnect a negative wire from the battery.
2. Remove an inlet chamber of an air path assembled with an air inlet sleeve.

3. Disconnect an electrical wiring from pumps of supply of liquid of washing of glasses. On the models equipped with a screen wiper of back glass, disconnect a hose of a washer of back glass and a zakuporta the nipple socket a suitable plug.

4. Turn out two fixing bolts, remove the tank of the washing liquid and take it aside.

5. 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 adaptation.
6. 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!

7. Turn out a spark plug.

8. Verify the turned-out candle with the ID card given below is will help at an assessment of the general condition of the engine.

Coal deposits

Symptoms: Availability of soot indicates reenrichment of fuel and 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 a float-operated chamber 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 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.

Oiling

Symptoms: Oiling of a candle is caused by wear of maslootrazhatelny caps. Oil gets to the combustion chamber through the worn-out directing 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.

Peploobrazovaniye

Symptoms: Soft brownish color of adjournment 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 fast accumulation of deposits change maslootrazhatelny caps that will prevent hit of oil in combustion chambers. Try to replace fuel brand.

Overheat

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

Wear

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

Detonation

Symptoms: Insulators can be chopped off or burst. Also inaccurate technology of adjustment of a candle gap can lead to damage of an 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 thus 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 a driving).

Zabryzgivaniye

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 a hot insulator, causing admissions of ignition. Recommendations: Replace candles or smooth out and establish into place the 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.

1. Disconnect a negative wire from the battery. Remove the battery with the holder.
2. Remove an inlet chamber of an air path assembled with an air inlet sleeve.
3. Disconnect an electrical wiring from pumps of supply of liquid of washing of glasses. On the models equipped with a screen wiper of back glass, disconnect a hose of a washer of back glass and a zakuporta the nipple socket a suitable plug.
4. Turn out two fixing bolts, remove the tank of the washing liquid and take it aside.
5. Remove an air cleaner casing.
6. Disconnect an electrical wiring from the ignition coil.

7. Remove the ignition coil.

8. 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!

9. Turn out a spark plug.

10. Verify the turned-out candle with the ID card given on a photographic insert is will help at an assessment of the general condition of the engine.

1. Before rolling new candles, slightly grease their carving part with the anti-taking sealant. Make sure available on a candle of a sealing washer. 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 demanded effort (in the presence of near at hand dinamometrichesky key). In the absence of a dinamometrichesky key screw a spark plug before contact of a sealing washer with a cylinder head, and then tighten on 1/4 ÷ 1/2 turns. For simplification of procedure of a nazhivleniye of a candle pull a piece of a flexible fuel hose on its shaft, - thus the probability of failure of a carving as at the slightest zakusyvaniye the hose will start being turned simply is excluded.

2. On l models 2.0 and 2.5 rotary progress put a wire VV tip on a spark plug shaft.

Before connecting VV an electrical wiring estimate its condition (see below). On models of 3.0 l install coils of ignition and connect to them an electrical wiring.

3. Repeat procedure for the remained spark plugs, carrying out all actions serially in order to avoid violation of an order of ignition.
4. Install ignition coils, - tighten fixing bolts with the demanded effort.

1. Check of a condition of VV of an electrical wiring should be made regardless of that, replacement of spark plugs was made, or not.
2. Check begins with external survey of isolation of wires at the working engine. Tire out the car to the dark room, start the engine and make sure of lack of sparking on wires. Sparking is an isolation breakdown sign. Try not to touch moving components in a motive compartment. Make necessary marks on replacement of defective wires, then let's the engine cool down.
3. Check of candle wires is made serially in order to avoid violation of an order of their connection at assembly. Usually on isolation of firm wires there is the corresponding marking. In case of absence that, put it independently by means of an adhesive tape and a marker.
4. Disconnect VV a wire from a spark plug (best of all use the special tool), - in which case do not pull for a wire, only for its tip.
5. Attentively examine internal walls of a tip. Corrosion is usually shown in the form of a fragile korkoobrazny raid of white color.
6. Pull a tip back on a shaft of the candle, make sure of density of its landing. In case of need again remove a tip and turn in plugs in a rubber cover.
7. Pure rags wipe a wire on all its length, having completely removed traces of dirt and greasing from an isolation surface. Examine isolation of a wire on existence of cracks, traces of a progar and other damages. Try not to bend a wire under acute angles in order to avoid violation of integrity of veins of the conductor in isolation.
8. Check a condition of contacts of wires from the ignition module, - again pull only for a tip.
9. Measure resistance of wires, compare results of measurements to standard requirements.
10. Replacement of VV of an electrical wiring should be made a set, even in case of failure of only one of wires.
11. Even at an excellent condition of system of ignition, at for start-up during wet weather there can be failures, - in case of need spray elements of system the moisture absorbing spray, - ask in shops of automobile accessories.