r3akt

Hey guys so I'm wondering if any off you have ever seen a chart with pictures that shows the conditions of the rotary ngk spark plugs? Im just wanting to check and compare my recently removed plugs so i can see if the condition of my engine is still okay.

w0ppe

You mean this?

lduley

iTrader: (1)

He said rotary, but the exact same thing still applies

gxl90rx7

iTrader: (1)

when i change rotary plugs they usually look like the "dry fouling" pic above

w0ppe

I realize; I've never had a rotary chart before. Spark-plugs are spark-plugs and the rotary is still an internal combustion engine.
0 resistance = dividing my 0... beware!

jjwalker

That is normal due to the oil metering system. The plugs shouldn't be fouled, but rather they will have more carbon deposits than a typical piston engines spark plugs.

r3akt

Yeah i have seen that before i was wondering if there was one just for the special rotary plugs

r3akt

Also is there a way to see if your water seals are about to go, by just looking at the spark plugs?
I will try and post a pic of my spark plugs and see if you guys can tell me anything about them. I believe my water jacket seals might be going out, i found some deposits on the plugs like a yellow brown color. so just wondering

w0ppe

Perhaps, you're better off checking your coolant for carbon and bubbles or doing a compression test to check about your water seals. If you do find coolant on your spark-plug, I'm not sure where it could have come from else...

r3akt

so if there was carbon in my coolant it would obviously be black in color, right? I will try and do a compression test soon. But doesn't this mean my car would overheat? It doesn't overheat at all if stays well below the med.

j9fd3s

iTrader: (3)

nope its the same, notice please that you are supposed to be looking at the porcelain insulator, and not really the rest of it, although you want to check the electrodes for wear (gap)

w0ppe

Yep, it looks like little black particles. would it overheat? You generally would want to shut it off when it gets up to temperature so it shouldn't be an issue.

jjwalker

And just to add, your overflow tank will have a faint smell of fuel and exhaust.