Originally Posted by XKalibuR
but who knows what happened.
I have a pretty good guess. Coolant mixed with the oil and destroyed the bearings in the engine. My guess would be a rod bearing. Either it was driven too long with coolant in the oil before it was fixed, or the contaminated oil was not sufficiently flushed when the repair was done. Did the mechanic change the oil and filter at least?
For the repair to last after the oil is emulsified takes quite a bit of effort in cleaning the engine, a lot of fresh oil, and at least two new filters before you can call it "fixed." Most mechanics don't take the time to do be meticulous here. And the result is often engine failure. It is a good reason for learning how to do it correctly yourself.
It'* really a shame. There have to be thousands of these Series II engines out there that have suffered a similar early death because of this curmmy intake manifold design. The trick in this case is to go against conventional "wisdom" and fix it with a sleeve, EGR air gap, and LIM gaskets BEFORE it leaks.