How do these plugs look? (5.3, AC Delco plugs)
#1
How do these plugs look? (5.3, AC Delco plugs)
Trying to diagnose a slight roughness at idle, so I took out the plugs from the driver side bank only (1,3,5,7) for the meantime, just to see what I could see.
Other than what looks like oil on the threads, the electrodes and firing tips look alright but I did notice a slight discolouration (pinkish) on the insulation of 1 and 3 mostly, and slightly on 5. All were still gapped to approx .040 as per stock.
Lemme know what you guys think.
Other than what looks like oil on the threads, the electrodes and firing tips look alright but I did notice a slight discolouration (pinkish) on the insulation of 1 and 3 mostly, and slightly on 5. All were still gapped to approx .040 as per stock.
Lemme know what you guys think.
#3
Ya I'll do the other side probably tomorrow. Unless motor oil is used as a lube/antiseize from the factory, I'm not really sure how it could creep past all the threads...I'm not seeing any signs of burning oil either, tail pipe or oil level going down.
I haven't had the manifold off yet, but when I switched throttle bodies I did wipe inside the plenum and there was some oil film, but nothing too crazy.
In the spring when I change the cam I'm going to reconfigure the PCV routing with a catch can to pull from the crankcase so I'll see if that makes a difference.
I haven't had the manifold off yet, but when I switched throttle bodies I did wipe inside the plenum and there was some oil film, but nothing too crazy.
In the spring when I change the cam I'm going to reconfigure the PCV routing with a catch can to pull from the crankcase so I'll see if that makes a difference.
#5
TECH Enthusiast
Dude when i did my headers at 40k miles i check the spark plugs.. there just like that.. so i replaced the # 40-110 ac delco i think thats the part number... iridium.. i have 45k miles on it and i just check it and there like new... but also i got a heavy foot lol
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