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Spark plug -BOSCH -

3400013
€3.95 *

incl. VAT plus shipping costs

In stock: can be delivered or picked up in the store

Heat rating of Ignition spark:

P For this item you get fidelity point/s
Spark plugs differ in the following things: Thread diameter The usual threads are M10, M12...Continue reading

Description


Spark plugs differ in the following things:

Thread diameter
The usual threads are M10, M12 and M14. Classic vehicles usually have an M14 thread. 4-strokes and modern 2-strokes with injection use the smaller plugs with M10 or M12.

thread length
The common thread lengths are 19mm (long thread)and 12.7mm (short thread).

heat value
The heat value is decisive for the thermal fatigue strength of the spark plug and its self-cleaning effect. A distinction is therefore made between so-called cold and hot spark plugs.
A cold plug is for engines that develop a very high combustion chamber temperature, usually these are engines which, measured by their cubic capacity, have a lot of power. A hot candle, on the other hand, is used in production engines with low loads. This type of candle quickly reaches a high temperature, whereby the soot on the candle burns off well.
The temperature resistance is achieved by differently designed insulators. A cold candle can give off a lot of temperature via the cylinder head, and a cold candle can strongly prevent this. The heat value has nothing to do with the strength or efficiency of a spark plug. A cold candle in a cold (weak) engine becomes oily or sooty and can break without damaging the engine itself. A hot spark plug in a racing engine burns up and damages it, usually severely.
The heat value of a spark plug is not standardized. Each manufacturer has its own code here.

  • NGK from cold to hot = 10-9-8-7-6
  • Bosch from cold to hot = 2-3-4-5-6
  • DENSO from cold to hot = 37-34-31-27-24-22-20-16-14

Electrode material
Here copper, platinum, silver or iridium come to the electrode material br /> Here copper, platinum, silver or even iridium come to the electrode material
The most common is copper, followed by silver and platinum. Due to the high prices for the precious metals, the spark plugs are also correspondingly more expensive than their copper counterparts.
The material is ultimately almost only interesting for wear, only the extremely thin Iridium electrodes (Ø=0.6mm) have a higher ignition voltage, the spread of the flame front in the combustion chamber improves.


(machine-translated)
 
Reviews 28
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Ratings


17 Feb 2018

Züntkerze Für Roller PK 50.

10 Jan 2018

Verlässliche Zündkerze, kaufe ich wieder.

1 Aug 2017

Gute Qualität

31 Jul 2017

Zündet,was auch sonst

17 Oct 2016

alles gut

15 Oct 2016

Passt sehr gut zu Vespa VBC

14 Oct 2016

Hat leider nch 2 Wochen in einer orgianl Pk50 versagt.

Label Made in India !

14 Oct 2016

gute Qualität-wie gewohnt

4 Jun 2016

sehr zuverlässige Zündkerze der Fima Bosch.

23 Mar 2016

Gute Kerze wie immer.

22 Mar 2016

Zufrieden, Qualität stimmt.

7 Feb 2016

immer wieder

21 Jan 2016

As described.

4 Aug 2015

Alles Gut

12 Jul 2015

Top Preis und gute Qualität!

5 Jul 2015

passt exakt

3 Jul 2015

gute Preis-Leistung -

30 Jun 2015

Alles gut.

21 Jun 2015

Top Kerze für PK50 XL2

21 May 2015

Top

19 May 2015

Top

15 May 2015

passt genau.

22 Apr 2015

Passt perfekt

27 Mar 2015

Top

6 Mar 2015

Candela già provata in passato. OK!

12 Dec 2014

Ich finde Bosch-Zündkerzen hochwertig produziert und meines Erachtens nach im Wärmewert optimal passend zu klassischen Vespa-Rollern.

5 Nov 2014

Alles bestens. Wie beschrieben

5 Nov 2014

Ich schwöre auf Bosch. Wird zwar nicht mehr alles in Deutschland produziert, aber immerhin eine solide deutsche Marke und haltbar sind die Kerzen allemal!

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