According to many years of experience in gasoline engine repair, ceramic core surface by looking at the color of
the spark plug can determine gasoline engine failure, are presented below:
1, the ceramic core surface white Related: automotive lubricants can not be said to avoid the daily use of four
errors appear in dozens of car repair errors
Gasoline engine is working.
2, the ceramic core surface was yellowish, reddish or reddish-brown
Gasoline engine work is also normal, the reason why the surface of the ceramic core spark plug was yellowish,
reddish or reddish brown, is due to the fuel, caused by the different additives.
3, the ceramic core was dark brown
Brown spark plug color was black, the side shell and very hard on the block with a thick carbon deposition.
There are two reasons: First, gasoline burning oil, because oil from the piston rings or valve guides into the
entry. Second, the reasons for the spark plug itself, with eyes to see a spark plug side electrode ceramic rupture
or break, there are obvious reasons for not from the outside. Its method of flashover can be checked, the spark
plug flat on the cylinder head, with central high-voltage bolts from the spark plug 5 mm or so, then move the
contact breaker flash over the situation to see spark plug gap. If strong and blue and white sparks, indicating
that the normal spark plug, if the weak spark or no spark, that spark plug itself is faulty and need replacing.
4, the ceramic core was miserable white
Ceramic core pale, that the spark plug overheating. In the multi-cylinder gasoline engine only appear in the
individual spark plug, spark plug heat value may be (hot type) is too low, misuse, inferior quality reasons; such
as a ceramic core cylinder often pale, you should check the cylinder compression ratio is not too high, or check
the water jacket around the spark plug is blocked. For the compression ratio, and should pay attention to whether
the phenomenon of hot ignition; if several tanks simultaneously pale ceramic core, should be considered gasoline
engine load is too large, insufficient capacity cooling system and other reasons, should be replaced with a higher
level of spark plug heat value.
5, the ceramic core was micro black
And there was micro thin black toner coverage, even the side of the torus shell are carbon deposition on the
electrode. If this phenomenon time cold, after low-speed operation, and after a period of normal use will eliminate
post. In normal use conditions such as high, spark plugs should be replaced with low calorific value. After
switching to gasoline should be noted that in the high-speed, high load without overheating and center pole
Shaorong spark plug, cylinder and so on.
The article above is transfered from glow plug, and spark plug. |