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How strong you die spark of your engine does not only depend on the thread diameter of the spark plugs, but also from the Material of the cylinder head. Many assume that simply replacing the spark plugs will suffice by feeling tightened with a spark plug wrench. But as technology shows us, that's enough these days not. If the spark plugs are tightened too loosely, so-called compression losses. This means that the pressure inside the cylinder decreases and various malfunctions occur. This can happen if the torque is too high when tightening the spark plugs Thread or even that cylinder head be damaged by the engine. In order to be able to reliably generate the desired torque, a torque wrench necessary, which is available in almost every hardware store.
Spark plugs can be tightened with the following torques:
To know with what torque you your spark plugs wear, you must thread diameter detect the spark plug. In most cases it is sufficient if you have one ruler use or on the Spark plug packaging watch. You can also use a caliper gauge to get an accurate measurement. Due to the complex structure, a cylinder head is mainly made of resistant light metals such as Aluminium, manufactured. In most cases, to be sure of what material the head is made of, it is sufficient to check with the manufacturers.
Nm is the unit of measure for torque. It means newton meter. 1 Nm corresponds to a force of 0,1 kg on a lever length of 1 meter.
- Spark plugs with a flat seat and gasket, with thread diameters of 10 to 18 mm offered. With a thread diameter of 10 mm you need to bring the spark plug with you 15 Nm put on. at 12 mm is the recommended torque already 25 NmWherein 14 mm it is 35 Nm and finally you need at 18mm 45Nm torque.
- spark plugs with one conical Seat are usually tightened with 10 Nm fewer dressed as flat seat candles.
- The torques given above refer to Cast iron cylinder heads. To transfer the moment to aluminum, one should respectively 5 Nm subtract from the given value.
The following video explains the spark plug installation procedures, with the help of a torque wrench or by applying one angle of rotation. Incidentally, one should note no lubricants to use.
The following note is essential: For safety reasons, tuningblog recommends all repair, inspection and maintenance work exclusively to be carried out in a specialist workshop! Although our information is summarized to the best of our knowledge and belief, we cannot assume any liability for the content. All information is therefore "without guarantee".
Of course, that wasn't the end of it!
In this tuningblog category there are guides and instructions for common defects/repairs on the vehicle and for installing accessories/tuning parts. Our articles explain in a simple way common defects and the corresponding repairs and they also explain how the first signs of a defect become noticeable. In most cases, we also have initial clues to the repair instructions in our repair instructions approximate costs listed. The goal of ourAuto Repair Guide“ is to create a head start in knowledge for the next visit to the workshop with initial tips. This may save you from tedious troubleshooting and you may even be able to do small things yourself. The same applies, of course, to the installation of accessories/tuning parts. Here, too, we would like to help with the implementation with instructions and tips. There are many other posts on this as well. Below is an excerpt of the last and HERE there are all previous instructions.
