Just wanted to get some opinion from you guys. These are spark plugs from cyl 1 & 2. Kinda hard to tell with crappy cell phone pic, but the burn has a greenish tint to it. The rest of the spark plugs are normal darkish brown burns, which cyl 1 & 2 also looked like a month ago. My L24 just randomly started overheating, nothing extreme, but the temps rise up to about 3/4 and then come back down. Waterpump and thermostat are new, radiator is fairly new. almost seems to me like a headgasket..but dont want to jump to conclusions until i get coolant pressure/compression tester.