Is it necessary to change spark plugs when switching to gas?
A large number of drivers do not know the answer to the following question: are spark plugs for gas and gasoline the same or do they have certain differences? And after installing and connecting a gas installation of any generation to their car, many continue to drive with old spark plugs. This is not recommended, since propane has slightly different characteristics from gasoline.
The main differences between gas and other types of fuel:
- After the carburetor, the gas-air mixture is poorer than the gasoline-air mixture.
- Gas burns at a lower rate than gasoline.
- The temperature that occurs after the combustion of gas in the chamber is much higher than during the detonation of gasoline.
- Gas leaves less harmful deposits after combustion.
Based on the parameters described above, we can conclude that when installing an LPG on a car, it is better to replace the spark plugs, that is, select the appropriate ones. Also, the resistance of propane with air is slightly greater than the gasoline mixture, so spark plugs for a gas engine should have a smaller gap between the contacts, which will provide a better and more powerful spark. Conventional spark plugs, designed for operation in a gasoline engine, can have a significantly reduced service life under operating conditions when using gas.
Composition and basic functioning of the ignition system on the UMZ 4216 engine
The layout is designed in a standard way. At the core is a coil. A high-voltage wire is routed from it to each cylinder. It connects to the spark plug. In general, the node is not maintained, with the exception of arsonists - they change.
The second winding has two circuits. One is connected to the igniters of the 1st and 4th cylinders, the other - to the 3rd and 2nd. At the command of the computer, two candles fire at once. Only one does this during the power stroke (during compression of the mixture), and the second does it idle, when releasing combustion products.
The system is equipped with a knock sensor. It allows the computer to flexibly react to the situation in the cylinders caused by the appearance of shock waves due to bad gasoline. The position adjustment is determined by a change in the ignition timing.
The main differences between spark plugs for gas
The materials from which spark plugs for gas and gasoline are made differ not only in price, but also in quality. After all, the detonation of the gas mixture in the combustion chamber leads to a much higher temperature than during a gasoline explosion. Therefore, spark plugs for gas contain the following metals:
- Copper is the most common metal, but nevertheless does not lose its useful qualities. Copper not only conducts electricity well and has increased flexibility, but this metal can also dissipate excess heat. The side electrode rod in gas spark plugs for cars is made of copper.
- A thin layer of platinum is used to create a coating for the side electrodes, which have a protective function, since platinum has a fairly high melting point.
- The central electrodes of spark plugs for gas of any generation are made of iridium. The iridium element is chemically neutral and can perfectly perform the function of an electrode.
Some manufacturers of spark plugs for gas engines even change the design of their products. Or they will improve them, for example, by applying an additional protective layer, which will reduce carbon deposits on the candles and improve their service life.
Spark plugs used for Gazelle with ZMZ-405 and 406 engines
Denso Iridium Power IK22 - recently installed, only positive emotions. I can’t say anything about durability yet, I’ve only been using them for two months.
Of course, you need to change the spark plugs. If only because all our previous publications (ZR, 2005, No. 10; 2007, No. 8; 2008, No. 9) invariably revealed a difference in the behavior of gasoline engines after replacing any of the “ignition” elements - from spark plugs to wires. And then - a change in fuel: the gas burns differently, and the mixture is leaner. Britain's M25 has seen 20 times more serious accidents since it was converted into a smart motorway.
If it is too large, it will hit the piston. The engine won't get any worse, but you'll have to throw away the spark plugs. If they are too small, the electrode will not reach the combustion chamber. Ignition will be difficult.
After clicking the “pay” button, you will be directed to the secure payment page of the Bank’s processing center, where you must enter your plastic card details.
I wanted something more reliable, maybe even something suitable from irides, or something that someone has tried? Thanks in advance for your answer.
The coronavirus infection, which was discovered in China, has caused fear and uncertainty among businesses that depend on trade in the affected region.
WR78X and WR78 Looks like they will fit here, I figured it out like X 1.1 mm gap without 0.8 mm R-resistor and then I don’t know W probably the spark plug profile or what kind of thread? Heads for 21?
The coronavirus infection, which was discovered in China, has caused fear and uncertainty among businesses that depend on trade in the affected region.
In this case, "A" stands for thread size. No other type of thread will be installed on this engine. The next number is called the heat number. It tells you how intensely the heat transfer from the candle occurs. The lower this parameter, the worse it cools, the more the electrodes heat up, becoming covered with soot.
Troiting a gazelle? Are the revs floating? Is the car shaking? Are errors P0300, P0171 on? What could be wrong? We have found a solution to this problem...
To find out which spark plugs are installed on Gazelle with engines 405 and 406, just read the corresponding section of the instructions for the car “Gazelle Engine”. It states that it uses A14DVR type spark plugs, as well as their possible analogues.
Therefore, the use of hot plugs in engines with a compression ratio of over 9.5 will lead to a significant drop in power due to glow ignition. In addition, as a result of insufficient compression, the gap between the spark plugs and valve plates begins to become covered with soot, which impairs engine performance.
Many car enthusiasts believe that spark plugs are not such significant elements of the ignition system, and nothing really depends on them.
Are there universal options?
If you take a closer look at the question: are spark plugs divided into gas and gasoline, then you can come to the conclusion that there is no unambiguous division. Some manufacturers simply pay attention to the components from which the candle is made, and these components can positively prove themselves when working on gas. Most often you can come across spark plugs that will work equally well when using gas in a car or on gasoline. Also, their service life will not change when switching to another fuel.
Be sure to watch the video:
For example, French Beru spark plugs function well both on gasoline and when using gas. When switching to gas, such a spark plug does not work to the detriment of engine power or consumption. Beru candles are a product of average quality, have a moderate cost and a long service life.
But spark plugs from the German manufacturer Bosch, model WR7DP, are specially tailored for gas powered engines. The Bosch spark plug electrode is completely immersed in an insulator, which has a positive effect on the spark plug’s resistance to mechanical damage. Also, the WR7DP model perfectly tolerates not only hypothermia, but also too sudden changes in temperature conditions. The main advantage of such spark plugs is that they are equally functional both at normal voltage and in the event of an emergency, for example, when the generator fails and the car's electrical circuit is powered by one battery.
The main advantages of Denso spark plugs, model IW20, pale in comparison with the fact that the use of these spark plugs will increase engine power by 5% and save gas fuel consumption by 7%. Denso spark plugs are not afraid of voltage surges and can ensure reliable engine operation even with low potential differences. But their cost is quite high and a complete set of such candles can cost a hefty sum.
NGK Spark Plug Europe GmbH can offer various spark plug options with one common parameter - impeccable quality, which over the years of operation does not disappoint customers. NGK spark plugs have a sufficient service life, good technical characteristics and an affordable price.
Selection of spark plugs for an engine with gas equipment
Taking into account the above, it becomes clear that the spark plugs need to be changed after switching to gas fuel. This will allow you to achieve the required service life of these elements, as well as eliminate problems associated with the complete combustion of the charge in the cylinders.
In other words, to reduce carbon deposits and achieve maximum performance from a gas engine, you need special spark plugs. It would seem that there should be no problems with the selection, but in practice certain difficulties arise, although HBO has been widely used for a long time.
So, let's look at the most popular spark plugs for gas engines, as well as their pros and cons. At the very beginning, it is worth paying attention to the fact that today there are many spark plugs on sale that are positioned as solutions for engines with LPG. At the same time, a large selection not only does not make it easier, but also somewhat complicates the task of finding the most optimal solutions.
- If we turn to the experience of car enthusiasts themselves, as well as analyze the recommendations of experts, Japanese spark plugs stand out separately. In the case of HBO, the position of Denso IW20 deserves special attention.
Let us immediately note that the cost is quite high (about 10-12 USD for one candle, that is, at least 50 US dollars for a set of 4 pieces). However, such a high price is partly justified by the fact that this Denso position increases engine power by 3-5%, and gas consumption also decreases by 5-7%. As for the service life, the elements are capable of working out the declared resource in full.
- Japanese products again took second place in the list of the best candles for HBO. Now we will talk about NGK Laser Line 2, which have shown themselves to be worthy on engines that use gas.
Their main difference from their competitor is their twice the cost (from 110 USD per set). This is due to the fact that the active use of iridium and platinum has made it possible to increase their service life to 200 thousand kilometers.
- Now let's move on to more affordable options. Among such products are Bosch WR7DP spark plugs, which are specially designed for gas engines.
In practice, these spark plugs have a good overall “margin of safety” and electrode wear resistance. The disadvantages include a shorter service life compared to expensive analogues, and these spark plugs are also inferior in spark power.
At the same time, the price is affordable for most car enthusiasts who have installed gas equipment in their car. More precisely, the cost is in the range of 21-22 USD. per set.
- Also among the more affordable spark plugs for gas engines, Brisk LR1YS should be highlighted. This product is a good solution in terms of price/quality ratio and is available at many points of sale. The cost of the set is about 13-15 USD. The spark plugs are specially designed to work on gas and do a good job.
However, this is where the advantages end, since a significant reduction in fuel consumption and a significantly increased service life should not be expected.
- The list of the most budget-friendly solutions also highlights individual items. For example, Plazmo for Super GAZ spark plugs are a Ukrainian development for engines with LPG. At the same time, along with its low cost (about $5 for 4 pieces), this product has an acceptable service life (up to 100-120 thousand km).
It is quite obvious that the use of such spark plugs will not reduce gas consumption and will not add engine power, but you should not be afraid of significant carbon formation, misfires, engine misfiring, starting problems, etc. Considering the affordable price and sufficient resource, this is a very good option.
- Also included in the list of the most affordable solutions for engines with gas equipment are Beru 14R-7DU spark plugs. In fact, this product is a regular mid-level spark plug for gasoline internal combustion engines. However, they can also be used for gas engines.
These spark plugs work normally in an engine with gas equipment, do not significantly reduce power, do not increase gas consumption, etc. For spark plugs that are “gasoline”, this is a pretty good indicator. The price of the set is around 7 USD, which is also quite acceptable.
As practical operation shows, if the driver actively uses both gas and gasoline, these spark plugs are suitable in this case, since they are not particularly sensitive to changes in the type of fuel.
It is also worth noting that among representatives of the lower price segment of gas spark plugs you can find many solutions, but in practice, even ordinary “gasoline” analogues of average quality can be better than special gas, but the cheapest spark plugs.
First of all, the service life of the spark plugs, the stability of their operation on gas, the heat rating, etc. are important. For this reason, before purchasing one or another option, you should not only select spark plugs for a car with LPG, but also carefully study the characteristics, features, parameters, etc.
What will running on gas lead to without replacing spark plugs?
As described above, spark plugs for gas and gasoline have not only a number of differences and advantages, but also quite different prices. But can running a gas-powered engine without replacing the spark plugs lead to serious damage?
If you do not change the spark plugs after installing the LPG, then this will not cause serious problems. It's just that spark plugs will be replaced much more often. And if the car is expensive and spark plugs are not cheap, then such a replacement can soon cost a pretty penny.
It is best not to skimp on such engine elements and focus on good budget options that will have a long service life, will not reduce engine power and will not increase new fuel consumption. Typically, a gas installation is installed on a car to reduce fuel costs, but if the service life of the spark plugs is reduced, then such savings simply will not happen.
Candles at 405.22
First of all, the high-voltage wires are disconnected from the tips of each spark plug. It is not recommended to remove it by pulling the wire, especially with great force.
Attention
Only the seals are removed. Otherwise you will break the armor wire. And their cost is much higher than the candles themselves. The tip is held in the seat by special plugs.
Important
In order to dismantle it, the plug is pryed off with a screwdriver. Then you should pull the tip itself. Before unscrewing the spark plug, you should inspect the area surrounding it.
There may be various debris or dirt - it is recommended to thoroughly clean the surface. After this, you can start unscrewing the elements. All that remains is to screw in new parts in place of the dismantled ones. If you were unable to find suitable spark plugs, selecting a Gazelle car will make your choice easier.
Gas candles
For a gas mixture it is higher than for a gasoline mixture.
In other words, it is more difficult to ignite a gas-air mixture than a gasoline mixture. A higher voltage is required to ignite the mixture, and therefore the spark plug is exposed to increased temperatures. What happens to the unignited mixture?
If the mixture fails to ignite, it is discharged from the vehicle system empty through the exhaust pipe, without generating any useful energy. This affects fuel consumption and system stability.
If the engine misfires in the next cycle, a reverse “pop” may occur - this means that the mixture that did not ignite during the previous cycle ignited at the beginning of the current operating cycle.
Why do they change spark plugs when installing LPG?
When the HBO kit is installed by professionals, they warn the car owner about the need to change the spark plugs. They are different from the petrol version. Re-equipping a car changes the performance characteristics of the engine.
What is the difference? Gasoline spark plugs are designed to ignite a gasoline-air mixture with a certain combustion temperature. The gas-air mixture is not so dense, has greater electrical resistance and heat at the moment of ignition. The interelectrode gap of gas spark plugs is reduced in comparison with similar gasoline spark plugs. At elevated temperatures, they must have an increased degree of resistance to heat.
Intense heating of the electrodes provokes glow ignition. In fact, ignition does not come from sparks breaking the gap between the electrodes, but from contact with hot candles.
For carburetor and injection vehicles with light loads, spark plugs with a low heat rating are recommended. Such devices immediately warm up to the required temperature of 700–800 C and ignite the air-fuel mixture well in a cold internal combustion engine. When the heat number is much higher, the candles do not have time to warm up to the required temperatures. Gradually, carbon deposits form on them. The period of use is much shorter. Engine power suffers because the combustion mode of the gas-air mixture in the cylinders is disrupted.
Rating of gas candles
If they have to function during the combustion of a mixture of air and gas, they can very quickly fail. Moreover, the electrical resistance of such a mixture is slightly greater than the mixture with gasoline, so for it to ignite, the interelectrode gap on the spark plugs must be slightly smaller.
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Having developed candles of this type, the manufacturers stopped there. Today they continue to convince car enthusiasts that only those spark plugs whose electrodes are made of noble materials, that is, they cost the most, can work best on a car with HBO.
A more reasonable explanation for the need to use special spark plugs for gas fuel is that gas combustion occurs at higher temperatures, which also affects their service life.
All this leads to the fact that in order to use spark plugs on cars with LPG, they need to be made from higher quality materials, among which modern manufacturers use: • Iridium, from which the central electrodes of such spark plugs are made; • Platinum, from which the side electrodes are soldered; • Copper, which is used to improve heat dissipation as it is used to make the side electrode rod.
The reality of what is happening
A motorist whose car is equipped with gas-cylinder equipment should think three times before spending money on the purchase of adapted spark plugs, which are supposedly capable of working much more efficiently and productively with blue fuel than with gasoline.
More than once, motorists who have installed gas equipment and bought specialized spark plugs note that they are only a marketing ploy. So manufacturers are trying to sell products that are no different from ordinary candles at a higher price. Yes, they can use other, and more expensive, materials and change the design somewhat. But in fact, according to car enthusiasts, the costs are not justified. The performance of the motor remains at the same level as with conventional spark plugs.
It’s not enough to simply rely on subjective reviews. It is much more correct to refer to the results of tests and studies. And they clearly show that even the highest quality gas spark plugs do not differ in efficiency and performance from universal-type devices aimed primarily at gasoline power units.
Yes, if you compare cheap universal spark plugs and spark generation devices adapted for gas, the advantage will be on the side of the latter. But they will not be able to impose a fight against universal candles of a higher level.
NGK LaserLine 2
To understand the essence of what is happening, you need to take into account the key differences between gas or LPG devices adapted from conventional gasoline ones.
Firstly, gas ones use a smaller gap between the electrodes. This allows for similar compression efficiency of a mixture of gas and air, comparable to the compression of air and gasoline.
Secondly, devices for gas-cylinder equipment have a higher heat index. This means that such candles are able to withstand higher heat loads.
The practice and experience of motorists clearly prove that buying high-quality universal spark plugs is in many ways equivalent to using expensive devices adapted for gas-air mixtures. But all other things being equal, even taking into account the slightly longer life of gas devices, purchasing universal products will cost less.
Plus, universal, but high-quality spark plugs can provide a greater increase in engine power and reduce fuel consumption.
You are unlikely to feel the benefits of any type of spark plug if you install the LPG incorrectly, violate the setup recommendations, or do not follow the operating instructions.
Also, an adapted and universal candle will not work effectively if you initially buy cheap products. It's not worth saving on such details. Focus on a specific situation, try different options and experiment.
The main thing is that the selected candles are of high quality, they do not turn out to be fakes and work as part of properly installed and configured gas equipment.
Correct spark plugs for ZMZ 406.2 and its analogues. — GAZ Volga community on DRIVE2
I need advice on spark plugs, now they are WR7DPX (Bosch platinum) Gap – 1.1 mm I drove it a little, changed it to 0.85 (the car seemed to behave a little better in transient modes and when torsioned at the rpm cutoff.)
I wanted to replace everything perfectly (the mileage on them is already excellent) with something else - there is no way to find exactly these that are not fake ((
Then I took it from the warehouse and verified that it was not a fake! His relative works with direct deliveries! I took WEEN, the Netherlands Spark plugs WEEN 386 ZMZ-405, 406 - With a run of 200 km, everything is covered in soot, no self-cleaning. I thought the gasoline was bad, cleaned, burned them, installed them, drove them to Tula 2 times, about 1200 km, drove the car in soot again I've eaten too much gasoline and the loss of dynamics behaves stupidly. On the stand there are rare gaps, but there were no gaps on the Bosch with their mileage. On the Bosch, where there is a thread, there is a ring of soot - the insulator, the center of the electrode is platinum and the spout itself is easily cleaned off with fingernails and is pure white or has a slight brownish-yellow color ( not yellow) the shade in general is as per the manual. They checked it on a pressure test stand and the technician looked at the spark plugs and said, refuel at the same gas station and there’s nothing to return the spark plugs that are so good. Further BRISK A-LINE, Czech Republic the same fable is even worse (The gap is not different helped
Then I installed Finwhale Volga dv 406 F706, a little better than the Veno ones, but they also hardly clean the car, it loses its dynamics and becomes dull - cleaning doesn’t help for a long time (But it’s better that the insulator is lighter and the center electrode is a little lighter.
I’ll remember what I installed and write again.
Recommend what to put?
We have the following tested ones in stock:
Such Spark plug BOSCH PLATINUM GAS 405,4062,409 WR8DP injector 555 - It seems like I only have a hot number, as I understand it, the glow is not 17 (from 16 -18) but 14 (from 13 to 15) There are 4 x those I don’t know, I really want find out try - maybe installed? Spark plugs BOSCH SUPER-4 2108-099 WR78 4-electrode 803 Spark plugs BOSCH SUPER-4 2108-10 WR78X 8cl injector 4-electrode 804
Spark plugs BOSCH SUPER-4 2110 and mod. FR78X0 16cl injector 4 electrodes 802
WR78X and WR78 Looks like they will fit here, I figured it out like X 1.1 mm gap without 0.8 mm R-resistor and then I don’t know W probably the spark plug profile or what kind of thread? Heads for 21?
Here FR78X0 at 19? then it won't work...? I think I need it for my 21 keys.
There are spark plugs NGK V-Line No. 6 BPR5E Volga, Gazelle dv.405,406, Opel, Nissan, Toyota, Mitsubishi, Renault But they say good ones are quite cheaper than Bosch? I haven’t tried them (they come last.
and Denso are like that
Spark plugs DENSO D 6 W16EPR-U Volga, Gazelle engine 405,406, Opel, Nissan, Toyota, Mitsubishi, Renault
And
Spark plugs DENSO W16TT Volga, Gazelle dv.405,406, VAG, BMW, Chevrolet, Daewoo, Honda, Hyundai, Kia These are 100 rubles more expensive than the top ones, I don’t know why ((
I wanted something more reliable, maybe even something suitable from irides, or something that someone has tried? Thanks in advance for your answer.
www.drive2.ru
Specialized gas spark plugs for cars: myth and reality
And this, in turn, is also reflected in the service life of the devices. This is why good ones for gas should be made of higher quality metals, among which are:
- Platinum SZ, in this case the side electrodes of the device are covered with a platinum layer.
- Iridium. For gas cars, the central electrode is made of iridium.
- Copper. This metal is used to improve heat dissipation; the side electrode rod is made of copper.
Sometimes manufacturers of gas spark plugs change the design of the devices, and additionally the housing of the elements is equipped with a protective layer. As a result, in propane-fueled systems, deposits and carbon deposits do not form as quickly as in the case of gasoline. But this is only in theory, but in fact it is not so easy to find devices that are intended for installation in cars with gas equipment.
Spark plugs ZMZ 406, 405, 409. Differences between the old and new models.
The topic of the article is ZMZ 406 spark plugs. This article was prompted to be written by the confusion that is going on on this issue. For engines ZMZ 406, 405, 409, there are two sizes of spark plugs. For a large spark plug wrench (21mm) and a small one (16mm). But very often people simply don’t know what the standard size is. This issue needs to be clarified somehow. I propose the following classification - old-style candles (thick) and new-style (thin).
Spark plugs ZMZ 406, identification
Since our people have almost stopped repairing cars themselves, the question of what kind of spark plugs you have in your engine confuses people. I’m not at all against the fact that everyone should mind their own business, but sometimes you need to know simple things in order to correctly order or buy consumables. I thought for a very long time about how to simply identify which candles are worth. The engine model says absolutely nothing. I myself did not know that the first releases of ZMZ 409 had “thick” spark plugs, I was sure that there could only be “thin” ones. People also cannot always answer the question of Euro-2, E-3 or E-4. Identification by ignition coils turned out to be the simplest and most understandable. If there are two coils on the valve cover - high-voltage wires and old-style spark plugs, if the coils are individual - new-style spark plugs. This is where it’s hard to miss.
Specifics
Still, most of the engines that have “old-style” spark plugs are ZMZ 406. And most of them are found in Volga, Sable and Gazelle cars. My work experience has shown the following trend. Or owners of similar cars need a budget option or one of the best. There is no average. Therefore, to complete the orders, I chose “regular” Bosch candles and Denso candles from the Nickel TT line. I won’t even consider our candles and all sorts of different Brisks, the reason is written in the article about “new sample” candles.
Spark plugs ZMZ 406, Bosch
old-style spark plugs, Bosch
Consumables of this type are what I call an “honest workhorse.” There are not enough stars from the sky, but it performs its function well from replacement to replacement. And one more thing that I have always liked about Bosch candles is differentiated pricing. Let me explain. There are several lines of candles: regular, platinum, multi-contact, etc. There is a gradation in price between candles of different classes. Bosch always tries to make a simple line of candles very affordable. This is not always the case in stores, but let it remain on the conscience of the sellers. In this case I am talking about the general approach. These spark plugs are listed in the catalog specifically for these engines. Replacement interval, either together with an oil change, or according to condition. But be sure to measure the distance between the electrodes. The manufacturer's recommended gap is 0.8-0.9 mm.
Spark plugs ZMZ 406, Denso
old-style spark plug, Denso
In 2010, the Japanese manufacturer Denso patented and began producing spark plugs using TT (Twin Tip) technology. The essence of the technology is thin electrodes that do not contain rare earth metals (platinum, iridium). The central electrode is made of nickel. But thanks to its design, the flammability of the mixture and other parameters are very close to the “platinum-iridium line” candles from other manufacturers, while remaining humane in price. From my experience, I note a good launch in the cold season. Candles come in a set of 4 pieces. Below are photos of the spark plug electrodes. These spark plugs have a longer replacement interval than a simple ruler, but they also do not last forever. The calculated interval recommended by the manufacturer is 30-40 thousand km. In Russian conditions and our gasoline is not the best, I recommend changing these spark plugs after 15 thousand km, that is, approximately once every two oil changes.
line of Nickel TT spark plugs, electrodes
