Lpg gas system maintenance and inspection

adminonMarch 23, 2022February 11, 2022Leave a Comment

Maintenance, inspection and repair of an LPG autogas system

The topic "LPG gas system maintenance" should not be neglected completely even if the gas system is working.

Periodically, depending on the manufacturer, it should be done every 15 years.000 to 30.000 km to be serviced:

With a prins VSI, BRC, landirenzo, or front-gas system, it is sufficient for the system to be serviced every 30.000 km in sight. A KME or stag300, however, should be inspected after no more than 15.000 km maintenance. The reason for this lies in the injectors: premium manufacturers usually have maintenance-free injectors. With the KME, z.B. Often valtek rails are installed, whose design requires a cyclical inspection on the test bench.

Usual work during a gas inspection

Before we start with the actual maintenance, we check on a short test drive, if the gas system switches cleanly and the vehicle can be moved smoothly.

A diagnostic device is used to read the fault memory from the engine control unit in order to take any existing faults into account in advance. The adaptation values of the mixture composition at idle give the first indications of the condition of the gas system resp. A possible problem with the engine.

After that the gas system is completely depressurized and only then the vehicle comes to the workshop, where all components of the gas system are technically tested.

The LPG gas filter

We often have discussions with customers whose vehicles no longer function as they should.

The following symptoms are frequently described to us:

The gas system jerks
No power despite full throttle
Switches back to gasoline immediately after switching to LPG
You have the feeling that no gas arrives in the front.

Often, the customer suspects that the gas filter is too or. The valve was clogged and therefore gas could not flow into the engine.

from my long experience i can assure you that in my whole career i had only two cases where this was true. With all others the problem was to be found at completely different place.

In most cases, after a professional inspection of the gas system, the symptoms have completely disappeared.

We always change all filters: the liquid phase filter as well as the gas phase filter. We use only high quality products that really keep what they promise. Unfortunately, there are many cheap products on the market whose filter performance (to put it politely) are in need of improvement.

Injectors/ rails

Rails of the manufacturer matrix, which are installed in a stargas, or even in the older frontgas gas systems, are completely disassembled and cleaned by us.

The injector valtek type 30, a KME gas system, is put on a special test bench, with which the stroke is then readjusted. All other injectors are largely maintenance-free.

We check installed gas hoses to see if the necessary test numbers are printed on them and if they are still in good condition. Otherwise they will be replaced.

The hoses of the water supply, as well as the underbody lines, are checked for any chafing or defects.

Ignition system

The ignition system, as well as the spark plugs, get special attention with us. The spark plugs should still be in good condition and should not show any ignition punctures at the insulator. Otherwise they must be replaced inevitably. An intact ignition system is the be-all and end-all for a well-functioning gas system. problems, which are hardly noticeable in gasoline operation, duplicate themselves in gas operation and lead to a rough engine run, or noticeable jerking at low revs and high loads.

Ideally, special spark plugs, which are suitable for LPG operation, are installed.

These are a little more expensive, but they have a change interval of 60.000km.

A spark plug should not look like this:

Worn LPG spark plug

It is all a matter of adjustment!

After all maintenance work is done, the gas pressure is checked with the engine running and adjusted if necessary. After that, the test drive is made, during which the gas map is readjusted. These adjustments require a lot of expertise and should be done carefully.

Leak check of the gas system

Finally, the entire gas system is checked with a gas detector for any leaks.

Cost of gas system maintenance

For a 4 cylinder you have to calculate with about 120, – €.

6 and 8 cylinder vehicles are more expensive depending on the effort required.

conclusion on the subject of LPG gas system maintenance

As you can see, an inspection does not only consist of replacing a gas filter. It requires a lot of experience and background knowledge and should always be done by a professional who understands his craft.

Maintenance and repair of all common systems:

Your system is not included? Just contact us.

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The air conditioner in the car should be used even in winter. in this article we will tell you the reasons. Photo: blueboeing / shutterstock.Com

Many drivers appreciate air conditioning in the summer, but even in winter it should be used from time to time. in this article we explain the reasons.

Using the air conditioner in winter? What sounds like a contradiction not only prevents damage to the air conditioning system, but offers several advantages at the same time. For the following reasons, you should activate your air conditioning in the car even in the cold season from time to time:

#01 – preventing damage to the air conditioning system

The construction of an air conditioning system is more complex than many people think. It consists of a closed circuit in which coolant alternately changes aggregate state from liquid to gas by changing pressure. The cooling is produced by sublimation (liquid to gas). If an air conditioner is not used throughout the cold seasons, the compressor, hoses and seals are not lubricated and dry out. Over the years, parts of the air conditioning system can become brittle and eventually leak. The consequence is that the air conditioning system fails and usually (depending on the defective component) needs expensive repairs.

ÜBy the way: how an air conditioner is built, you can see very well in this video.

#02 – avoiding fungal and bacterial infestation

Moisture and heat provide the ideal breeding ground for bacteria and fungi. Especially in the area of the evaporator there are good conditions for this due to the accumulation of condensation water. If the air conditioning system is not used regularly, this promotes the formation of unhealthy bacteria and fungi, which also enter the interior of the car via the ventilation system.

#03 – avoid unpleasant odors

If mold forms in the air-conditioning system, unpleasant odors can also develop. After long breaks, the smell spreads throughout the car as soon as the air conditioning is activated again. Regular use of the air conditioner even during the colder seasons is the easiest way to prevent bad odors. If there is already a strong unpleasant odor, it is possible that fungus has already formed. the odors disappear after a long period of use of the air conditioner, but are usually present again in a short time. In this case, the air conditioner should be cleaned or at least disinfected.

#04 – the air conditioner dehumidifies the car (fogged windows)

Fogged windows are a problem for many drivers in the cool seasons. Activating the air conditioner can help you see through foggy windows. It extracts moisture from the air without the air having to be particularly warm to do so. This makes sense especially for short distances, if you do not necessarily want to heat up the whole car.

Here is what you should pay attention to when using the air conditioner in winter

So there are several reasons to use the air conditioner every now and then, even in winter. For correct use in winter, however, you should pay attention to the following points:

– do not switch on below 3 to 4 degrees – in case of frost, an air conditioner can be damaged during operation. Most air conditioners have temperature sensors built in for this reason and usually cannot be activated at all when the temperature is cold enough.

– activate at least once a month – to prevent damage, you should run the air conditioner at least once a month for about 10 minutes, even in the cold seasons.

– after switching off, you should leave the fan running for a few minutes – condensed water accumulates on the evaporator, which flushes odors out of the system, but also increases the humidity inside after the trip. If you leave the fan running for a short time after turning off the air conditioner, the moisture will be blown out of the system and the risk of fungus will be minimized.

– avoid clogged rain drains – in addition, make sure that no leaves or excessive dirt accumulate in the rain drains. Such dirt can collect moisture, which also spreads inside, causing mold and fogged windows.

An everyday youngtimer: a mercedes s-class from the 70s or 80s can still be used without any problems today.

(photo: picture alliance / dpa-tmn)

Old-timer owners no longer only take their classic cars out of the garage when the sun is shining. The use in everyday life is increasing. But caution is advised.

In 2001, the Federal Motor Transport Authority (KBA) in Flensburg registered around 60 lomax vehicles.000 vehicles with H-plates have been registered, the number is now 210.000 cars. All the "youngtimers" or endurance runners without official oldtimer status are not even counted yet. And for a long time now, many horsepower nostalgics have no longer been content with fair-weather drives. More and more often they use their classic as an everyday car.

"in principle, that’s not a problem," says florijan hadzic, press spokesman for daimler classic in stuttgart: "because many vehicles that are already considered classics today, such as the strich-acht or the SL from the R 107 generation, are absolutely suitable for everyday use with the right care and prove themselves on the boulevard just as well as in rush-hour traffic."According to hadzic, classic cars are not just "prewar runabouts" that you really don’t want to drive to the office in.

Caution! Different driving behavior

An everyday youngtimer: A Mercedes S-Class from the 1970s or 1980s can still be used today without any problems. (Image: Daimler/dpa/tmn)Not much in it, not much on it: The technology of older cars - here a Fiat 124 Spider - is much simpler than in current models. (Image: Fiat/dpa/tmn)Showpiece: Some owners prefer to show off their elaborately restored cars to a select audience at classic car gatherings like the Concorso d'Eleganza Villa d'Este. (Image: BMW/dpa/tmn)

Showpiece: some owners prefer to show off their painstakingly restored car to a select audience at classic car meets like the concorso d’eleganza villa d’este.

Nevertheless, experts urge caution. Because the handling of a classic car is not comparable with that of a new car. "you should be aware that higher forces often have to be applied when steering and braking due to the lack of power assistance," warns classic car expert dieter ritter from the automobile club avd in frankfurt. The generally much poorer tire grip, braking performance and road holding of the oldies are also not comparable with modern vehicles. "the achievements of modern technology cause glaring differences" – not to mention electronic assistance systems, modern headlights or powerful windshield wipers.

It’s no wonder that classic cars crash more often on the road than cultural historians would like. According to statistics from the allianz insurance company in munich, the accident rate is significantly lower than the average due to the low mileage, and in most cases there is only minor damage. But "inexperience and overestimation of one’s own capabilities combined with a lack of driving experience lead to accidents time and again, especially with sporty classic cars," says johann gwehenberger, head of accident research and loss prevention at the allianz center for technology.

Technical defects often lead to accidents

Not much in it, not much on it: the technology of older cars – here a fiat 124 spider – is much simpler than in current models.

(photo: picture alliance / dpa-tmn)

Hobby drivers in particular frequently cause rear-end collisions. "they are often unaware of the low deceleration potential of the brakes or brake too carefully in an emergency situation in order to protect their vehicle," says gwehenberger. This risk can be reduced through driver training courses for classic car owners, which are offered by some automobile clubs.

Technical defects are a particularly frequent cause of accidents involving classic cars. If water collects in the brake line, the brakes can fail. Aging tires can also burst, or brittle vehicle windows can refract sunlight and blind the driver.

Observe stickers and registration regulations

When it comes to the everyday use of a classic car, it’s not just the pitfalls of the technology that need to be taken into account: the laws on pollutants also demand caution. "genuine oldtimers", i.e. vehicles with H or 07 license plates, do not require a fine dust sticker. They are exempt from the ban on driving in environmental zones," says avd expert ritter, giving the all-clear. But the same conditions generally apply to "youngtimers" as to all other vehicles: without the appropriate sticker, the environmental zone is off-limits for them. that’s why many manufacturers now offer retrofit solutions for their young classics. Where this is demonstrably not possible, a "youngtimer" owner can apply for an exemption permit at a charge, according to ritter.

another sticking point when it comes to everyday use are the registration rules: "the H license plate is intended for permanent use, but is subject to the condition that the vehicles are used primarily for the maintenance of the motor vehicle cultural heritage," says avd expert ritter. Therefore you could get into explanation trouble on the way to the office. cars with a so-called 07 license plate are taboo for driving to work: they may only be used for test drives, for taking part in events and for driving for maintenance purposes. "so you can go to the garage, but you can’t go to the grocery store around the corner."

Lpg gas system maintenance and inspection

Maintenance, inspection and repair of an LPG autogas system

Usual work during a gas inspection

The LPG gas filter

Injectors/ rails

Ignition system

It is all a matter of adjustment!

Leak check of the gas system

Cost of gas system maintenance

conclusion on the subject of LPG gas system maintenance

Maintenance and repair of all common systems:

Your system is not included? Just contact us.

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