Spark plug Question
08-25-2008, 02:12 PM
#13
Staging Lane
Join Date: Dec 2007
Posts: 71
Likes: 0
Received 0 Likes
on
0 Posts
One sign of heat used by some professionals is electrode color. Many--but not all--spark-plug electrodes have an alloy composition that will oxidize green when subjected to high temperatures. This nickel oxide on the center wire and sidewire would show up first at the tip of the electrode--the hottest part--and progress from there, depending on temperature. Excessive green oxide may signal it's time to change to a colder plug. The main thing to keep in mind here is that not all electrodes oxidize (turn green) at the same rate, if at all. Therefore, your best bet is to turn to a technician with experience reading plugs
08-25-2008, 02:15 PM
#14
One sign of heat used by some professionals is electrode color. Many--but not all--spark-plug electrodes have an alloy composition that will oxidize green when subjected to high temperatures. This nickel oxide on the center wire and sidewire would show up first at the tip of the electrode--the hottest part--and progress from there, depending on temperature. Excessive green oxide may signal it's time to change to a colder plug. The main thing to keep in mind here is that not all electrodes oxidize (turn green) at the same rate, if at all. Therefore, your best bet is to turn to a technician with experience reading plugs
08-25-2008, 02:17 PM
#15
Staging Lane
Join Date: Dec 2007
Posts: 71
Likes: 0
Received 0 Likes
on
0 Posts
It is basically for lawnmowers, etc.. but it does give some what of a reason why it would turn green.
http://www.grounds-mag.com/mag/groun...g_spark_plugs/
http://www.grounds-mag.com/mag/groun...g_spark_plugs/
08-25-2008, 02:44 PM
#17
TECH Apprentice
iTrader: (2)
Join Date: Dec 2004
Location: Roch. NY.
Posts: 390
Likes: 0
Received 0 Likes
on
0 Posts
Was your cylinder #7 plug any lighter in color than the rest or was it the same color?
Just curious since several people have posted about #7 running hotter(breaking ringlands) than the rest. When changing out my plugs (on 2 different sets) I noticed that both times #7 was white with very little coloring at all. That was NA and after Maggie install. This has led me to believe it is a cooling issue around #7. I also swapped injectors at #7 and still have same plug readings.
Just curious since several people have posted about #7 running hotter(breaking ringlands) than the rest. When changing out my plugs (on 2 different sets) I noticed that both times #7 was white with very little coloring at all. That was NA and after Maggie install. This has led me to believe it is a cooling issue around #7. I also swapped injectors at #7 and still have same plug readings.
08-25-2008, 06:56 PM
#20
Staging Lane
Join Date: Dec 2007
Posts: 71
Likes: 0
Received 0 Likes
on
0 Posts