My 1973 Impala (400 small block, if that makes any difference) sat for several months. I ran a battery down today trying to start it. I went to autozone to find something to help me start it. The guy told me to pull out the spark plugs, spray WD-40 in the cylinders, then crank it a few times with the plugs out so there was no pressure.
Most of the plugs were either dry or oily. One, however, had water with coolant (antifreeze-colored water) pour out of its socket as I removed it. No, this car hasn’t been in a flood, nor has water been allowed down into the carburetor. I’ve read on here the answers to similar questions and, other than for those who had had water poured into their engine, the answers ranged from: huh?; you need a new manifold; and you might need a new gasket. The models referred to were much newer models so I do not feel safe assuming my problem is exactly the same. Furthermore, about 13-14 years ago I had an intake manifold gasket fail and its defining feature was the oil turning thick and goopy–paint-like. That hasn’t happened yet, but I also recall it took a while for the oil and coolant mixed to turn goopy (I was in New Mexico when my coolant started mysteriously disappearing, but I was back to Oklahoma before the oil got goopy.).
So I guess my question most of all is: how do I pinpoint the cause of my problem?