jimmied

i changed my plugs to the new oems this weekend. the old ones had some brown discoloration on the ceramic part closest to where a plug socket tightens.

i thought i read somewhere it should still be white or i am running hot.

On the same note. i did some other maintenance and noticed my coolant was above the max and some had leaked through top of reservoir. i drained what i needed. anything to worry about. the reason why i am asking i could smell coolant while driving. everything else checked out. oil is clean, coolant is clean just overfilled (previous owner). i have yet to drive with coolant at correct level so i cannot update on smell.

i know i have been asking a lot of questions lately. just trying to learn the car. my last one didnt last long enough to learn on. i appreciate all your help.

Slows2k

The brown/rusty discoloration between the ceramic insulator and hex is normal, every NGK plug does it. When "reading" plugs, You look at the insulator section that faces the piston. If your car is stock, there isn't much to be worried about when "reading" the plug.

xviper

Here is a pic of some pretty "normal" plugs out of an S2000:

If you look carefully, you'll see evidence of the brown discoloration. This is with only a few thousand miles on them.

As for the coolant level, when stone cold, the reservoir level should be between the "add" and "full" lines. With it there, it should not overflow.

jimmied

ok the tips themselves were pretty good condition and all looked the same.

coolant i should be ok with now.

thanks for the help