Collect stories and tales about the installation of LPG, separate the truth from falsehood, explains the nuances. Authors Vladimir Melnichenko, photo Sergei Torganova, author, archive edition
The gasoline engine works so-so, and you have been planning to install LPG? Install and drive while on the gas! Injection will fix it later.
Wrong! If the engine of your car and the gasoline works like the installation of LPG on it is absolutely contraindicated. The explanation is simple – even modern interrupter systems do not replace staff, but only use information from them. That is, the gas injection is based on the data from the regular unit, all adjustments in different modes of operation of the motor is calculated only based on the gasoline cards. So before you go on a HUNDRED interrupter does not hurt to ensure normal operation of the injectors, and if necessary even to clean them. Equally important functioning naturally aspirated and the ignition system. And even untimely replaced air filter will disrupt the normal operation of the motor, because of the “fresh breath” depends very much.
Most interrupter stations may conduct a preliminary diagnosis (100-300 UAH) and give their verdict about the possibility of conversion. When this is done on-Board computer diagnostics system, checked the spark plugs, or even measured the compression. Sometimes the adjustment is made to the injection system. Do not neglect the advice of the masters and think that’ll come easy. If gasoline slightest deviation from the norm (incorrect ignition timing, increased electrode gap of spark, poor quality wires or “tired” saddles and valves) are offset, gas fuel, they can become serious problems.
Master installer offers to replace the spark plugs instead of the regular special installing of gas. Agree?
The proposal to replace the plugs may indeed be caused by their poor condition. But the insistence to put a special “gas” candles rather groundless, since the normal operation of the LPG and conventional quite suitable. Of course, if the normal state and the correct electrode gap.
Of course, the gas and the candles have specific meaning. Because the air-gas fuel mixture, in contrast to the air-petrol has higher electrical resistance. That is why gas candles have reduced the interelectrode gap, and due to the material of the Central electrode is a cooler heat rating, which compensates for higher temperature in the cylinders in the combustion gas. But, as mentioned above, this procedure is not mandatory and is unlikely to affect system operation and gas flow. Candles for gas, as a rule, more expensive than usual by 20-30%.
After installation of the LPG my car will be removed from the guarantee?
Even given the fact that in a model program many automakers have cars with factory interrupter systems (VW, Fiat, Mercedes, Seat, Renault and many others), in Ukraine such models with rare exception are not supplied. And only a few are official in Ukraine is ready to give the go-ahead for the installation of LPG. For example, Hyundai, Kia, Toyota, Mercedes, Ford, VW and some other official can offer you an “official” conversion, by their own station or stations with which they have agreements. The cost of such services, as a rule, above the average market price by 15-20%, equipment selection virtually no. For those who are not willing to pay more and prefer a self-selection system, the only solution is to wait for the end of the warranty and to go to the gasman. If you install LPG from third-party firms before the end of the guarantee – that it will end.
LPG reduces engine life due to increased wear of piston rings and the failure of the fuel injectors?
Gas less than gasoline, change the oil viscosity, the better it mixes with air and burns more evenly. In the gas fuel does not contain sulfur and lead, and when using gas as a fuel is formed of carbon on the pistons, valves and spark plugs. In addition, the octane of the gas is higher than gasoline, which eliminates detonation. On this basis, and guided by practical experience, it can be argued that a correctly installed and configured gas equipment do not cause the engine absolutely no harm.
After installation of the LPG is a risk that has burned valves.
This phenomenon really takes place, though not to such an extent as to paint the “experienced” people. Moreover, with proper installation and proper setup LPG this factor is practically eliminated. But in General, the burning air-gas fuel mixture takes longer. However, even in the moment of opening of the exhaust valves in the combustion chamber is still ongoing and the actual valve and seat are subjected to overheating and eventually “SAG”. Partially this problem is solved lifters, because they automatically adjust the gap. But even their absence is not a reason to abandon the LPG. There are several options that will help you to minimize this effect.
One of the most famous ways is to install so-called “dropper” (1500-1800 HR). It is a device that will be feeding into the intake tract with fuel-air mixture of a special liquid lubricant. It has special additives forming a film on the valves and seats, which improves heat transfer and will significantly increase their service life. In the “starter” kit you get 1 liter of such liquid, and it will suffice for about 1000 liters of gas. Further, the reserve lubricant will have to top up (1 liter – 350-400 UAH) simply adding to the capacity installed under the hood.
Second, and more efficient way – the installation of variable-speed ignition timing (2000-2500 UAH). It is an electronic device depending on the mode of operation of the motor dynamically changes the moment of ignition of the fuel mixture, thereby optimizing the process of combustion. It operates only when the gas fuel is automatically deactivated when driving on gasoline.
Some motorists even combine both options for reinsurance. Increases whether this effect is difficult to say, but deterioration has not yet been noted. Regardless of these tricks, it is recommended to periodically check and adjust the valves (about 30,000 km) that virtually eliminates concerns about their condition.
At the time or not: when in fact change the oil?
I drive fast, love to “twist” the motor. No gas for me?
Enthusiasts of riding with a cast of the tachometer needle in the red zone, there is a perception that the gas in this case is unacceptable. And this is the truth, because when revving the engine even on gasoline will run on high, and gas will get more and more heat load. To avoid this, in the modern LPG provides automatic switching of fuel modes. The threshold is configured to a HUNDRED (at the request of the owner is from 3500 to 5000 rpm). That is “hyped” motor above this threshold, it is switched to gasoline. The revs fell the engine is automatically returned to the gas.
Installing LPG, about the replacement of the fuel filter you can forget.
Alas, this is not so, because in gas mode the fuel pump is still pumping fuel and the “return line” pushes back into the tank. This is done in order to create a normal system pressure in case the driver or LPG you want to instantly switch to gasoline.
In fact, disconnected with only the petrol injector. And despite the fact that each the engine is warming up on petrol, the LPG producers strongly recommend you to periodically travel on regular fuel to the injectors and the entire petrol supply system, at least a little while.
I have a Range Rover with a V8 volume of 5 L. the Wizard refused to put it on LPG. Why?
Today you can “gasify” in almost any car. But even this rule has small exceptions. For example, a complex arrangement of components and assemblies that prevent installation. Or high-tech systems combined injection, which does not allow to choose a normal working algorithm of regular gasoline and gas system.
For example, a 5 litre Range Rover will work with LPG, but for installation will take almost personal presence of the designers. The main problem is to drill holes for screwing the gas fittings. When performing this operation, the slightest mistake or inaccuracy in the choice of location for the hole can cause damage to the intercooler. Naturally, to run such an operation would require a high skill of the installer and inexperience no one wants to accidentally damage an expensive car.
Often difficulty with the installation of LPG arise among the owners of Mitsubishi Pajero Wagon 3.5 GDI (6G74), Nissan X-Trail 2.0 (MR20DD) or the Audi Q7 3.0 TFSI. Lexus LS460 can be converted to gas only in versions with distributed injection, but the technology of a combined injection used in the engine of this car, yet none of the installers did not win.
But over time, the situation is changing, and manufacturers of LPG equipment offer new solutions.
Thank STO PROFIGAS for help in the preparation of this article.
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