How does one read a spark plug

[TYTILIDIE]

I pulled plugs today and noticed a very solid white stripe on the whatever its called. I think I read once that is referred to the timing mark? Hows do you know where it should be and what does it mean at what locations? Our mark was at the base.

 

[It's just a six]

Re: How does one read a spark plug

Indexing your plugs you mean?
http://dodgeram.org/tech/gas/spark_plugs/s_plug _indexing.htm
http://holdenpaedia.oldholden.com/Spark_Plug_Indexing
http://www.fordmuscle.com/archives/2000/07/indexplugs/

 

[Windedv6]

Re: How does one read a spark plug

I pulled plugs today and noticed a very solid white stripe on the whatever its called. I think I read once that is referred to the timing mark? Hows do you know where it should be and what does it mean at what locations? Our mark was at the base.

WOT timing mark should be about at the curve of the electrode. The idle timing mark is slighty farther towards the tip.

Post up a pic...

John

 

[WyoSyclone]

Re: How does one read a spark plug

This is the best info I've found....

http://www.4secondsflat.com/Spark_plug_reading.html

 

[TYTILIDIE]

Re: How does one read a spark plug

I'll try and get a pic of it. The white stripe I am seeing is VERY pronounced. Almost looks like paint and is showing up at the base of the ground strap. Rob, good link.

 

[WyoSyclone]

Re: How does one read a spark plug

I'll try and get a pic of it. The white stripe I am seeing is VERY pronounced. Almost looks like paint and is showing up at the base of the ground strap. Rob, good link.

I'd say too much timing, as shown on callout #1 on that link.