If it's a 103 engine, there are several annoyances, like the leaking head gasket, bad valve seals, leaking front cover, water pump, etc. But these things won't shut the engine down. In 18 years of driving mine, I found only 2 things that stranded me:
1. Alternator failed, and gave absolutely no warning until the battery went down so far the lights dimmed noticeably. luckily I was very close to home, and limped home with just the park lights on. Apparantly a design flaw, the idiot light was working, but never came on. So, install a new regulator/brush kit for about $20.
2. Belt tensioner failed - dead meat, had to call for help. Just replace it now.

Other than that, the thing is bulletproof. I went in at 110K to replace the oozing head gasket, and you could still see the hone marks on the thrust side of the cylinders.

DG