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Those are ash deposits on the ground electrode, from burning a bit of oil which is normal for that length of miles, you are not running lean. The upper bodies of the plugs look like they have oil on them, were they wet with oil ? , maybe from leaky valvecover seals ? They lived a good life at 50k miles, I wouldn't run them any longer as you can see erosion of the center electrode in the pics, gaps were likely out of spec at that point. Don't go with a colder plug it won't make things any better, maybe worse.
Last edited by zeroptzero; Jan 7, 2017 at 01:37 PM.
You may want to recheck the tightness of the new sparks after a few hundred miles. Just to be sure they aren't backing off and causing leakage.
A better question would be -- what did you torque them to? It's a trick question, because the [old] shop manual is incorrect and plugs have backed out. Make sure you torqued to 20-22 ft-lbs.
Those are ash deposits on the ground electrode, from burning a bit of oil which is normal for that length of miles, you are not running lean. The upper bodies of the plugs look like they have oil on them, were they wet with oil ? , maybe from leaky valvecover seals ? They lived a good life at 50k miles, I wouldn't run them any longer as you can see erosion of the center electrode in the pics, gaps were likely out of spec at that point. Don't go with a colder plug it won't make things any better, maybe worse.
thanks for the reply! Ill have to order a new set.
A better question would be -- what did you torque them to? It's a trick question, because the [old] shop manual is incorrect and plugs have backed out. Make sure you torqued to 20-22 ft-lbs.
I actually purchased the car with the plugs so im not sure on the spec but i did torque them to 20ft when i reinstalled them
Were the upper bodies wet with oil ? or is that just dry stains
they are stained. The coilpacks were dry, so maybe the coil gaskets were leaking before i got the car or still are but just slightly. There is no way of cleaning or gapping on these plugs correct?
Even though yours only have 50k miles, I would get new ones as they don't look so good. Btw your compression, if it was 180 on all fours, is completely fine (consistency across cylinders is what matters).
New plugs are the solution but Honda doesn't make spark plugs, not do they brand them.
A set of OEM NGK PFR7G-11S is $44.12 ($11.03 each) on Amazon. One click and they're on their way. "11S" is the OEM gap. Pre-gapped. Plugs are pre-anti-seized, don't add more.
There's a pen and ink change in my shop manual noting the correct torque is 24 lb-ft. Twenty four. Use a torque wrench.
Spark plugs (probably asked before)
