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Finally getting around to changing the plugs on the car. These have probably been in there for the better part of a decade, IIRC.
Recently overfilled with oil a bit which is clearly evident on the threads. It's back to within range now but seems there was some collateral damage here, no surprise.
Any insights from expert plug readers? Or any suggestions before I replace with a new set of TR6's gapped @ .035?
(Plugs are positioned as if you're standing in front of the car looking into the engine bay - driver's side on right)
Really any observations from folks who are expert in reading plugs would certainly be welcome. Looks to me like #8 may be running a little rich but I feel like I recall that being somewhat standard for the LS6 intake design. But, I could be wrong. Again, no expert here, but always interested in optimizing my setup wherever I can.
Not much to "read" with a 10yr old plug. You can make some basic observations on general cylinder performance over the last 30000 miles. i.e. cyl #8 looks like it's consuming some oil. cyl #1 looks normal/healthy. For some good insight, there are many articles on the net regarding "reading spark plugs".
Not much to "read" with a 10yr old plug. You can make some basic observations on general cylinder performance over the last 30000 miles. i.e. cyl #8 looks like it's consuming some oil. cyl #1 looks normal/healthy. For some good insight, there are many articles on the net regarding "reading spark plugs".
Yeah, I've read a lot of articles about reading plugs, and these seem overall "good/decent" wear from what I've read. I was mostly curious if there was anything glaringly wrong or that needed particular address that wouldn't be evident otherwise.
FWIW, the care barely gets driven. I think I put about 50 miles a year on it, maybe even less in some years over the last 10. So, these plugs might have a few thousand miles on them, if that.
Originally Posted by IGN-1A
Would you be able to take a picture of the plug insulator showing the "fireband" location ?
I wouldn't say a lot of idle time. It lives attached to a trickle charger so I don't need to start it up that often. And when I do start it up (every month or two), I take it out and about to get it all up to temp and give it a few aggressive rows through the gears to get everything flowing. But, like I said, it definitely doesn't get regularly driven. There have been times it's sat for probably 3, 4, or 5 months without starting it.
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Spark Plug Read 
