Plug gaps widening...
21 June 2003, 03:19 AM
#1
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A friend and I have just checked his plugs and have noticed that they have opened up considerably since they were installed less than a year ago. They were initially gapped at 0.7mm are now well over 1mm.
What would be the cause of this ? We also noticed that the original plugs that were replaced also had a considerable gap as well.
[Edited by Father Xmas - 21/06/2003 03:22:43]
What would be the cause of this ? We also noticed that the original plugs that were replaced also had a considerable gap as well.
[Edited by Father Xmas - 21/06/2003 03:22:43]
21 June 2003, 09:33 AM
#2
When the plug fires, the arc is hot enough to vaporise a very small amount of metal from the tip.
Over time, this loss of metal widens the gap.
I tend to get a gap increase of about 0.2mm in 10,000 miles which leads to poor idling & performance and also crunchy gear changes(why??).
Regapping every 7,500 and getting new plugs every 15,000 miles seems to cure these probs.
Nick
Over time, this loss of metal widens the gap.
I tend to get a gap increase of about 0.2mm in 10,000 miles which leads to poor idling & performance and also crunchy gear changes(why??).
Regapping every 7,500 and getting new plugs every 15,000 miles seems to cure these probs.
Nick
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