cosworth1971 Posted July 18, 2007 Share Posted July 18, 2007 just went to change plugs that have been done about 3000ks ago to try copper ones and found no2 spark plug had white powder all around outside but electrode looked like the rest.Ive never see that before and it looked like the powder u can get on a battery lead . what could it mean?and am i alone in ever seeing this.I only drive the car on weekends and rarely as u can see its just number 2 ,number one and 3 and all others are new looking Link to comment https://www.sau.com.au/forums/topic/177058-found-white-powder-on-no2-pluglike-what-tha/ Share on other sites More sharing options...
RANDY Posted July 18, 2007 Share Posted July 18, 2007 Usually a white or milky substance is when water mixes with oil... like... if you had a blown head-gasket or something. Your white gunk is well above the thread, where the rubber boot of the coilpack would normally be. So I'd rule that one out. It's also nowhere near where the sparkplug arcs... so it shouldn't be a mixture thing. It could be old grease maybe? Someone put new plugs in with a really filthy sparkplug socket or something? Link to comment https://www.sau.com.au/forums/topic/177058-found-white-powder-on-no2-pluglike-what-tha/#findComment-3236140 Share on other sites More sharing options...
cosworth1971 Posted July 18, 2007 Author Share Posted July 18, 2007 Usually a white or milky substance is when water mixes with oil... like... if you had a blown head-gasket or something.Your white gunk is well above the thread, where the rubber boot of the coilpack would normally be. So I'd rule that one out. It's also nowhere near where the sparkplug arcs... so it shouldn't be a mixture thing. It could be old grease maybe? Someone put new plugs in with a really filthy sparkplug socket or something? nope new socket set?im confussed its like fungus on my sparkplug(joke).It just like the chalky stuff u see on a battery post but never seen it on a plug b4! Link to comment https://www.sau.com.au/forums/topic/177058-found-white-powder-on-no2-pluglike-what-tha/#findComment-3236223 Share on other sites More sharing options...
Lunatikk Posted July 18, 2007 Share Posted July 18, 2007 Here's a wild stab........ Check the boot on the bottom of that particular coil & I'm guessing it will be somehow damaged. At some time some water got in there (washing down the engine maybe) & with the heat from the engine, boiled off/evaporated away & the remnants of what was left behind is what you are seeing in the white-ish powder. I did exactly the above with my own car & even though I was (or so I thought) being careful with the amount of water going onto the top covers etc I still managed to fill not one but two of the plug recesses in the head. On closer inspection someone previous to me had, for whatever reason, taken a blade to the bottom of the coil boot. Shouldn't happen, but it can & does Link to comment https://www.sau.com.au/forums/topic/177058-found-white-powder-on-no2-pluglike-what-tha/#findComment-3236971 Share on other sites More sharing options...
12VES Posted July 18, 2007 Share Posted July 18, 2007 Agreed it looks like corrosion. Check the coil cover seal and see if it's damaged at all. Someone at some point may have washed the engine bay, and water probably leaked down and sat around the plug. Link to comment https://www.sau.com.au/forums/topic/177058-found-white-powder-on-no2-pluglike-what-tha/#findComment-3237133 Share on other sites More sharing options...
cosworth1971 Posted July 18, 2007 Author Share Posted July 18, 2007 yer must have been some water got in there Link to comment https://www.sau.com.au/forums/topic/177058-found-white-powder-on-no2-pluglike-what-tha/#findComment-3237285 Share on other sites More sharing options...
Godzilla32 Posted July 20, 2007 Share Posted July 20, 2007 Because its not on the thread itself it rules out a loose plug. So its most likely a poor connection between the coil and plug causing arcing or as previously mentioned corrosion from water sitting in there. Thats the most likely cause but if it were the case you would be experiencing a decent misfire from it! Deren Link to comment https://www.sau.com.au/forums/topic/177058-found-white-powder-on-no2-pluglike-what-tha/#findComment-3240826 Share on other sites More sharing options...
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