[Alex V.]

Changed the plugs on my '85 454 the other night and they were all nice and consistent save for number 2 (right):


The lower electrode, insulator, and outer case look the same as all the others, but the upper strap had a damp, yellow-green residue on it. The engine has 125K on it with no other feedback to indicate it's burning water - clean oil and coolant, no noticable coolant loss, no steam out the exhaust, etc. Oil comsumption is a quart every 6-800 mi. but a large portion of that is valve seals and various leaks. Haven't done a compression test yet. How likely is it that, considering the position of #2's intake port in relation to the water passage, it's the intake gasket seeping and not a head gasket?