blown head gasket OR if in only one cylinder then maybe the plug was loose?
The surface of the piston facing the spark plug electrode.
The surface of the piston facing the spark plug electrode.
Fouling Spark PlugsThere are only two things I can think of that cause spark plug fouling:The fuel mixture is way too "rich."The "oil" rings on the piston are worn, allowing crankcase oil to get past and above the piston into the combustion chamber.
The fuel/air mixture is compressed by the piston moving upwards, the spark plug ignites that mixture and causes an explosion which pushes the piston downward.
the sparkplug is located on top of the piston chamber to ignite the fuel compressed by the piston when the spark goes off
which is 5 piston
It gets any the thIckness of a penny!!
The gas goes to the piston chamber not the spark plug. Is your fuel pump working and if so are the jets blocked.
A variety of reasons, most common is a bad spark plug wire or coil pack but possibly a bad crank sensor, but could be a bad piston ring, scored piston chamber wall. a hole in the piston, etc Check the spark plug pocket to see if it is full of water.
You probably have the wrong spark plug(s) installed. The wrong spark plug may be longer than specifiactions amd is why the piston is hitting it. If you have the correct spark plugs installed, then it is likely that one of the valves is stuck in the open postion. You can determine this with a compression test. You do not want to drive around with the piston hitting either the wrong spark plug or stuck valve - will damage or crack the piston and will be a costly repair. It is probable that the stuck valve (if that's the problem) may be bent.
No. How could there be? The "stroke" of an engine is the piston going up or down. If the spark plug fires and piston goes down, then up,and then fires again, then it's a two-stroke engine. IN a 4-stroke engine, the spark plug fires, piston does down, then up to exhaust the cylinder, then down to suck in fresh air and cool the cylinder, and up again to compress, and the spark plug fires every other "up". How could you have a "three-stroke" engine? The spark plug fires and the explosion pushes the piston down, and the crankshaft pushes it back up. Then back down. If the spark plug fires while the piston is DOWN, the engine will seize up. Nope. In a piston engine, the number of "strokes" is always an even number. For radial or Wankel engines, things are different - but in those there is no piston, and no "stroke".
Defective spark plug, plug wire, burnt valve, busted piston, bad rings, blown head gasket or cracked head.Defective spark plug, plug wire, burnt valve, busted piston, bad rings, blown head gasket or cracked head.