Replacement of the spark plug: "Gazelle" 405, 406, 4216
The engines ZMZ-405 and 406, as well as the unitUMZ-4216 is equipped with cars "Gazelle". These motors have shown themselves well in the composition of commercial vehicles. But with all the advantages with these settings, there are annoying breakdowns, such as candle failure. It is very important to know how to diagnose problems with them and how to replace the spark plug ("Gazelle"). It is also important to know which brands and brands of products are used for these cars.
Design
These parts can be the most diversemanufacturers, and can have a different design. Also, the candles differ among themselves on materials. By design, these elements are divided into two-electrode and multi-electrode.
So, in a detail that is equipped with two electrodes - one central and one side electrode.
In contrast to the multielectrode solution, thea classic product, only one electrode that burns or breaks during operation. In this case, only replace the spark plug. "Gazelle", on which there is a multi-electrode element, is more resistant to temperatures.
Materials for production
In more accessible products, the electrodes are made of copper or yttrium alloys. With all their merits and price, these parts can not withstand high temperatures and are unstable before burning out.
More expensive candles are made of platinum. Of these alloys, both the central and side electrodes are made. This metal has a very high resistance to corrosion processes. They have significantly higher reliability and efficiency.
Also, in addition to materials, the selection is very importantsuch a parameter as the glow number. There are cold and hot parts. What it is? This is the standard characteristic by which the time is reached for reaching a detail of a glow ignition. The higher the figure, the less the element will be heated.
What does the candle affect?
Some motorists are sure that this is not the most important and by no means significant element in the car.
On how good the spark will be,which is created between the electrodes, such parameters as the quality, as well as the speed with which the working mixture will burn will depend. Needless to say, this determines the power and fuel consumption of the car.
If the spark is insufficient, and it can bebecause of the wrong gap between the two electrodes, the part of the fuel will fly out, as they say, into the pipe and the work will not perform. Even through the fault of this part, there are misfiring. This is due to damage to the insulation layer or loss of integrity.
Replacement of spark plugs ("Gazelle 405" in thatnumber) for any engine ZMZ will help solve the problem with the missing spark. However, different manufacturers produce models that are calculated for specific operating conditions. On one motor, a set of new parts of the corresponding model can work well. But on another spark can be weak, which will affect the quality of combustion of fuel.
When replacement of the spark plug ("Gazelle Business") is required,
So, the malfunction is determined by the symptoms. So, if the power unit does not start properly and the start-up process passes with difficulty, then this is a signal about the need for replacement.
Another symptom that often happens onaggregates ZMZ-405, 406 and UMP-4216 - tripling. The machine can twitch, and the thrust and power of the engine are significantly reduced. Increased largely fuel consumption, exhaust gases with a high content of carbon dioxide, weak dynamics - all these are also signals to replace.
If the owner in due time will pay attention tothese symptoms, the problem can be solved by simple replacement of a candle. If you do nothing, the result will be sad. In the cylinders, detonation can occur. It will be accompanied by a shock wave, which can trigger a detonation charge, which remained in the cylinder. The engine will lose power as a result, the crankshaft will suffer greatly, as well as connecting rods and pistons.
When to change?
Manufacturer of commercial truck data intechnical documentation indicates that the spark plugs on the "Gazelle" (406 engine, 405 or any other on these cars) should be replaced after 30-50 thousand km.
The operating time of the elements depends on the set ofvarious factors. This and the quality of fuel, the correct ignition adjustment, the integrity and condition of the wiring, as well as the absence of breakdowns on the body.
Checking the state of the candles: color will tell about everything
That this detail is not played with the driver angryjoke, you need to regularly inspect the condition. So, the color of the cap will help to identify malfunctions in the engine. If the ignition in the car is established correctly, and the engine was operated on high-quality gasoline, the color of the socle will be light brown.
If it is black, then there may be omissionssparks due to some problems in the wiring or ignition system. But it can also indicate problems in the food system. If an orange belt is observed on the insulating element, the part has lost its tightness, therefore an immediate replacement is required.
How to test candles?
In the process of visual inspection of parts alsoit is recommended to check their operability. Convenient and effective control of their work, using special stands, which allow you to check the sparking under different pressures.
"Gazelle" and regular candles
So, the "Gazelle" uses candles with a long thread. In the design - the central electrode, ceramic insulator, skirt and side electrode.
Features of candles for "Gazelle"
The main feature is the gap between twoelectrodes. It should be 0.8 mm. Another important is the glow number. So, the spark plug ("Gazelle" 406 or 405 including) is recommended for use on lightly engineered engines, where the landing rate is small. Candles from VAZ to "Gazelle" simply do not fit. They have an increased gap. It is 1 mm. The caliber number is 17. With them there will be misfiring and unstable work.
Popular foreign analogs
German spark plugs "Gazelle" (405 engine)Digests "well. They also fit the 406 unit. Among the popular brands are Bosch products with W8D and WR8D models, products from Brisk LR17Y or LR17YC. Also candles for "Gazelle" are produced by Champion - these are models NR11Y and NR11YC. Another popular brand is NGK. This model for these motors is suitable models BPR5E and BPR5ES.
If you need a spark plug (Gazelle 4216), then all presented brands and models will also fit into this engine. The main thing is that the model had a long thread.
Replacement of parts for ZMZ-405 and 406
This is a simple operation that does not require any serious tools or skills.
In the seat the tip is held on special plugs. In order to dismantle it, the plug is pierced with a screwdriver. Then you should pull the tip itself.
Before you unscrew a candle, you should inspect the surrounding area.
It remains only to screw the new parts into placedismantled. If it was not possible to find suitable spark plugs, selection by car "Gazelle" will facilitate the choice. Before installation, the spark plug is checked for the presence of a sealing ring. Also look for the presence of a contact nut. If it does not exist, it is removed from the old one. The replacement process must be carried out consistently. The procedure for replacing the candles on UMZ-4216 engines is the same and does not differ from the engines of the ZMZ.
So, we found out how to replace these items on commercial vehicles "Gazelle".
