In this article we will talk in detail about replacing spark plugs on a Lada Largus car with an 8 and 16 cl engine. The manufacturer recommends replacing spark plugs every 30 thousand km. This is exactly what the life of the candles and their performance are designed for.
Lada Largus cars are equipped with engines from Renault, so the spark plugs are suitable specifically for engines of this brand.
Which spark plugs are suitable for a 16 cl K4M engine?
If you have a Lada Largus with a 16 valve engine, the original Renault spark plugs 7700500155 will suit you. The official analogues of these spark plugs are Motrio 224018651R. If you can’t buy such candles from us, you can get by with analogues from other manufacturers:
- BOSCH FR 7 LDC+ 0242235668 price from 600 rubles per set
- DENSO K20TT K20TT#4 price per set from 550 rub.
- CHAMPION RC87YCL
- SAGEM RFN58LZ
The above spark plugs are suitable for a 1.6 16 cl engine. K4M 102 (105) hp To replace the spark plugs, we need a spark plug wrench with a size of 16 and a socket with a size of 8 in order to unscrew the ignition coils.
The difference between replacing spark plugs on 16-cl and 8-cl engines is that on 16-valve engines each spark plug has a separate ignition coil, and on 8-valve engines there is only one coil. Also, spark plugs have different potassium numbers, plug types, diameters and gaps.
Spark plugs Lada Largus for 8- and 16-valve engines
Spark plugs for Largus 1.6 differ from each other only depending on how many valves the engine has. On cars with 8-valve engines (K7M, VAZ-11189), the manufacturer installs spark plugs under article number 7700500168. They have a regular nickel central electrode and two side electrodes. The same candles can be found directly from the manufacturer EYQUEM under the article number RFC58LZ2E. An analogue from a Russian manufacturer has article number 224013682R. These models are no different from each other and are interchangeable.
On Largus with a 16-valve K4M engine, spark plugs are installed under article number 7700500155. Unlike the previous spare part, these spark plugs have one side electrode, but they are nickel. The French manufacturer EYQUEM has the article number RFN58LZ. The Russian analogue has article number 224018651R.
Read also: Casting for UAZ Hunter
On a Largus with a 16-valve engine, you can also install spark plugs with 2 side electrodes from an 8-valve engine, but not vice versa. On 8-valve valves, only 2-pin ones are installed. As drivers note, spark plugs with 2 side electrodes slightly improve engine performance by reducing vibration.
Read more about the sizes of original candles in the table below.
| vendor code | Engine | Thread / thread length, mm | Key size | Gap, mm | Heat number* | Center electrode material |
| 7700500168 224013682R | K7M, VAZ-11189 | 14×1,25 / 19 | 16 | 0.9 | 6 | Nickel |
| 7700500155 224018651R | K4M |
*nomenclature from NGK
The most commonly used substitutes are presented below.
| Manufacturer | vendor code | Price, rub (for 1 piece) |
| For 8-valve engines | ||
| Bosch | 0241235751 | 130 |
| Denso | K20TX-R | 270 |
| For 16-valve engines | ||
| BERU | Z 193 | 150 |
| Bosch | 0242235666 | 90 |
Since the manufacturer installs conventional nickel spark plugs on their cars, which have a short service life, Largus owners often resort to installing more expensive iridium spark plugs. Their service life is often 3-4 times longer than nickel ones, and in addition they also slightly improve the dynamic performance of the engine. For 8 valve Lada Largus, the most popular model is Denso IW20 at a price of 670 rubles/piece. And for 16-valve cars it will be Denso IK20 RUB 520/piece.
When to change spark plugs on Lada Largus?
According to the LADA Largus maintenance regulations, spark plugs are changed every 30 thousand km. But, as most drivers note, the actual service life of original spark plugs often approaches the 50 thousand km mark. If iridium spark plugs are installed, they usually last up to 100 - 120 thousand km.
Instructions for replacing spark plugs on a 16 valve engine
To avoid getting burned, it is best to carry out the replacement when the engine has cooled down. The first thing we need to do is remove the pads from each ignition coil.
To do this, carefully press the latch and disconnect each coil.
Using an extension and a 8mm socket, unscrew the bolt securing the coil to the body.
Now carefully pull the coil out of the well and put it aside.
Using a 16 mm wrench, unscrew the spark plug, then install a new spark plug, screw it in, put on the ignition coil and screw it in, generally reassemble in the reverse order. We change the spark plugs on the remaining cylinders in the same way.
Tighten the spark plugs with a force of 25–30 Nm.
After replacing all the spark plugs, no action is required to configure and adapt the motor.
Spark plugs for Lada Largus
When buying candles on Lada Largus, you do not just purchase the necessary consumables. The correct selection of an element, insignificant in size and cost, determines the behavior of the car on the road, the cost of its maintenance, and your mood. Correctly selected spark plugs directly affect the speed, dynamic, and performance characteristics of the car.
The spark plugs included in the ignition system of a gasoline internal combustion engine serve to generate an electrical discharge. Under the influence of incoming voltage, a spark is formed between their electrodes. The subsequent ignition of the fuel mixture provides the energy necessary for the vehicle to move.
Faulty spark plugs can cause a lot of problems and hassle. The most serious ones include the following:
- difficult, especially at low temperatures, starting;
- unstable engine operation in idle, low and medium speed modes;
- reduction in power, deterioration in vehicle acceleration dynamics;
- increased fuel consumption.
All this makes the choice of spark plugs for Lada Largus not just part of the next technical or seasonal maintenance.
Lada Largus engines allow the use of spark plugs from different manufacturers, models, and operating data. Only their external characteristics remain unchanged - M14 thread with a length of the corresponding part of 19 mm, installation dimensions for a spark plug or socket wrench of 16.
Let's look at the most popular models of spark plugs that are equipped with Lada Largus engines. They differ in the number of contacts, as well as the metals used for their manufacture. Based on this, it is possible to install spark plugs with one or more side electrodes. The materials used are traditional chromium-nickel alloys or platinum group metals.
Let's start with the most common single-pin spark plugs.
The manufacturer of the K7M power unit with 8 valves provides for the installation of Renault spark plugs - a simple and reliable ignition source. It is manufactured mainly in France or in other countries under the strict control of the developer. Among high-quality analogues, it is recommended to use candles from manufacturers such as Bosh, Denso, NGK.
Among the best developments are the German Bosch FR7DC+ with iridium coating, the Japanese Denso K20PRU11 and NGK 4856 BKR6E. These models are distinguished by proven quality and long service life. All of them are equally successfully installed on the K7M 710 or the K4M 690, which has 16 valves.
The electrical discharge constantly arising between the central and side electrodes gradually leads to the destruction of the latter. The multi-contact design significantly extends the life of the spark plug. Therefore, installing Renault or Bosch FR7DC+ two-pin spark plugs on eight-valve K7M engines reduces the cost of periodic maintenance of Largus vehicles.
Among the three-pin spark plugs, it is worth noting Bosch 0241235752. By forming a stable spark, they ensure complete combustion of the fuel-air mixture. This helps the engine produce maximum power and optimal traction characteristics.
I would like to complete the review of spark plugs recommended for Lada Largus with iridium NGK Iridium 6418 BKR6EIX. Among the main advantages are a long service life (at least 70,000 km when consuming high-quality gasoline) and excellent starting qualities in the cold season.
Changing spark plugs in a Lada Largus engine is not difficult even for inexperienced car enthusiasts. A minimum of tools, good accessibility - even for the first time, the whole operation will take no more than half an hour.
The procedure for removing spark plugs for the K4M and K7M engines differs in only one way. On the 8-valve, before dismantling, it is enough to remove the high-voltage wires. In a 16-valve engine, it is necessary to unscrew the bolts securing the ignition coils. When performing work on any engine, it is recommended to clean the spark plug wells from dirt with compressed air.
The performance of your car’s engine depends on what spark plugs you install on your Lada Largus and how promptly you change them. By making the right choice, you will make life easier for yourself and your pet.
on the:
Source: https://largus-shop.spb.ru/helpful/item/2640-svechi-zazhiganiya-dlya-lada-largus
Instructions for replacing spark plugs on an 8 valve K7M engine
So, remove the tip from the candle and before we begin to remove it, use a pump or a rag to clean the area around the candle. This is necessary to ensure that no dirt or grains of dust get into the well.
Using a 16mm spark plug wrench or a similar head, unscrew the spark plug and screw in a new one.
Then we put on the tip and replace it on the remaining cylinders.
The tightening torque of the spark plugs is 25–30 Nm.
If you remove all the tips from the candles at once, then remember how they stood, or carefully look at the order in which they were installed. Each wire is installed on a specific cylinder; the number can be found on the module (ignition coil).
How to remove ignition coils on K4M and K7M engines
The ignition system of the K4M engine consists of individual ignition coils and spark plugs for each cylinder. There are no high-voltage wires in the ignition system - the tip of the coil is placed directly on the spark plug.
The ignition system of the K7M engine consists of an ignition coil, high-voltage wires and spark plugs. The K7M engine has an ignition module, which is a block of two coils.
The tips of high-voltage wires are connected to the terminals of the secondary windings of the coils. The current in the primary windings of the ignition coils is controlled by the ECU depending on the engine operating mode.
The coils are powered sequentially in pairs. Thus, a spark simultaneously jumps in two cylinders (1-4 or 2-3) - in one at the end of the compression stroke (working spark), in the other at the end of the exhaust stroke (idle).
Removing and installing ignition coils
We prepare the car for the job. Using a 10 key, disconnect the negative terminal of the battery.
On the K4M engine, disconnect the wiring harness blocks from coils 1.
Rice. 1
Using a 8mm socket, unscrew the 2nd bolts securing the ignition coils and remove them.
Before installing the ignition coils, you need to replace the bolts 2, the coil fastenings and, if necessary, replace the coil sealing rings.
When replacement is required
The spark plugs should be replaced in accordance with the vehicle maintenance regulations, that is, every 15 thousand km. These are the requirements when it comes to standard spare parts supplied by the manufacturer. There are many innovative types of these platinum plated or iridium plated parts available in the aftermarket today. In such cases, their service life is much longer.
Spark plugs must be replaced not only as planned or for preventive purposes, but also due to malfunctions. This could be contamination of the skirt with carbon deposits or oil when driving on a cold engine, or coking of the thermal cone caused by increased oil consumption. If replacement is not done in a timely manner, the electrodes may burn out, resulting in an increase in the gap and an insulation breakdown. One of the causes of problems may be a manufacturing defect, leading to the passage of gases through the insulator and housing. If these faults are present, the car does not start well or the engine begins to stall. This is unacceptable for further operation of the car - you need to find the damaged spark plug and replace it.
Return to contents
