Bosch spark plugs selection by vehicle
Content
About 350 million different spark plugs are manufactured annually at the Bosch plant, which is almost a million spark plugs in one working day. Given the variety of cars produced around the world, you can imagine how many candles are required for different makes and models of cars, provided that each car can have from 3 to 12 spark plugs. Let's take a look at this variety of candles, consider the decoding of their markings, as well as the selection of Bosch spark plugs for the car.
Bosch spark plugs
Bosch spark plug marking
Bosch spark plugs are marked as follows: DM7CDP4
The first character is the type of thread, what types are:
- F - M14x1,5 thread with flat sealing seat and spanner size 16 mm / SW16;
- H - thread M14x1,25 with a conical seal seat and a turnkey size of 16 mm / SW16;
- D - M18x1,5 thread with a conical seal seat and a spanner size of 21 mm (SW21);
- M - M18x1,5 thread with a flat seal seat and a turnkey size of 25 mm / SW25;
- W - M14x1,25 thread with a flat sealing seat and a spanner size of 21 mm / SW21.
The second character is the purpose of the candle for a certain type of motor:
- L - candles with a semi-surface spark gap;
- M - for racing and sports cars;
- R - with resistance to suppress radio interference;
- S - for small, low-power engines.
The third digit is the heat number: 13, 12,11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 09, 08, 07, 06.
The fourth character is the length of the thread on the spark plug / protrusion of the center electrode:
- A - the length of the threaded part is 12,7 mm, the normal position of the spark;
- B - thread length 12,7 mm, extended spark position;
- C - thread length 19 mm, normal spark position;
- D - thread length 19 mm, extended spark position;
- DT - thread length 19 mm, extended spark position and three ground electrodes;
- L - thread length 19 mm, far extended spark position.
The fifth character is the number of electrodes:
- The symbol is missing - one;
- D - two;
- T - three;
- Q is four.
The sixth character is the material of the central electrode:
- C - copper;
- E – nickel-yttrium;
- S – silver;
- P is platinum.
The seventh digit is the material of the side electrode:
- 0 - deviation from the main type;
- 1 - with a nickel side electrode;
- 2 - with a bimetallic side electrode;
- 4 - elongated thermal cone of the candle insulator;
- 9 - special version.
Selection of Bosch spark plugs by vehicle
In order to make a selection of Bosch spark plugs for a car, there is a service that allows you to do this in a few clicks. For example, consider the selection of candles for a Mercedes-Benz E200, 2010 release.
1. Go to link. In the center of the page you will see a drop-down list “Select your car brand..”. We click and select the brand of our car, in our case we choose Mercedes-Benz.
Bosch spark plugs selection by vehicle
2. A page opens with a complete list of models, in the case of Mercedes, the list is divided into classes. We are looking for the E-class we need. The table also shows the engine numbers, year of manufacture, car model. Find a suitable model, click "Details" and get a spark plug model suitable for your car.
Bosch spark plugs selection by car second stage
Benefits of Bosch spark plugs
- There are practically no tolerances at the factories of manufacturing Bosch candles, everything is produced exactly according to the specified parameters. In addition, modern materials are used in the manufacture of electrodes: iridium, platinum, rhodium, which allows to extend the life of the candles.
- Modern developments: long spark path, allowing more accurate spark in the combustion chamber. And also a directional side electrode, which contributes to better combustion of the fuel-air mixture in engines with direct injection.
What Spark Plugs Can Say
Type of used candles
Questions and answers:
How to choose the right candles for your car? You need to focus on the type of ignition, fuel system, engine compression, as well as on the operating conditions of the engine (forced, deformed, turbocharged, etc.).
How to choose NGK candles? The combination of letters and numbers on the candles indicates their characteristics. Therefore, first of all, you need to select those that are better suited to a specific engine.
How to distinguish original NGK candles from a fake? On one side of the hexagon is marked with a batch number (there is no marking for a fake), and the insulator is very smooth (for a fake it is rough).
