[lettingg0]

the other day after driving my z (134k orig miles on it) my oil pressure guage, which hasn't worked in years suddenly pegged. The temp was normal and the engine was running fine. I drove the couple blocks to home and when I pulled in the drive, steam was rolling out of the hood. I checked the radiator fluid and it was ok. The oil was a little low (1/2qt) and was clean, no froth. Looking under the engine, the pan has a little coolant in it. It also looked like there were a few drops of coolant around one of the spark plugs (left side 2nd plug from front) but I couldn't tell if it came from there or not.
The car has only been driven a little over 3500 miles in the last 3 years but up til now has been running great.
Can anyone please give me an idea of what might be going on. When I started up again, the it idled fine but the pressure guage pegged again right away. I am afraid to even drive it to the mechanic. Also, I don't know if this as anything to do with it, but it keeps draining the battery, even with the positive lead disconnected.
Thanks for any help, LG