I replaced factory spark plugs (Denso SKJ20DR-M11 iridium) today at 106k miles, 171k kms. It's a 2009 Acura CSX (Canadian specific vehicle) with K20Z2 engine, which is same as Acura RSX base. Replaced it with NGK.
First cylinder (at the very bottom) to the top (4th cylinder).
Another picture, all looks same except 3rd cylinder
3rd cylinder always runs leaner than the others with all K20/K24 engines, as a result I believe the tip/electrode color is slightly different. Also, it is a PAIN to get to the spark plugs with the 8th gen Civic & K20 engine, as you have to take off the front cowl, plastic trims, as well as metal support that connects both struts. It took me around 1.5 hrs total that includes PCV valve change as well.
I think could have gone longer, but the interval is 105k, also I am WFH since last March, I think it is a nice opportunity to get it done while it sits. When I start driving it actively (60 miles a day), it'd be harder to work on my car(s).
Aside from the electrode/tip color, I am not sure why the tread color is different on the 3rd cylinder plug, any ideas? More heat?
Thanks
First cylinder (at the very bottom) to the top (4th cylinder).
Another picture, all looks same except 3rd cylinder
3rd cylinder always runs leaner than the others with all K20/K24 engines, as a result I believe the tip/electrode color is slightly different. Also, it is a PAIN to get to the spark plugs with the 8th gen Civic & K20 engine, as you have to take off the front cowl, plastic trims, as well as metal support that connects both struts. It took me around 1.5 hrs total that includes PCV valve change as well.
I think could have gone longer, but the interval is 105k, also I am WFH since last March, I think it is a nice opportunity to get it done while it sits. When I start driving it actively (60 miles a day), it'd be harder to work on my car(s).
Aside from the electrode/tip color, I am not sure why the tread color is different on the 3rd cylinder plug, any ideas? More heat?
Thanks
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