I took the rabbit on it's inaugural run tonight and got about 80 miles in before it crapped out. I was doing a long hard pull up a hill in 3rd gear (4 spd), and the coolant expansion tank developed a nice hole right under the cap. All my coolant boiled out and got sucked into the intake. I didn't notice anything until I heard a ticking and the engine started loosing power pretty steadily. I pulled off the side of the road and the engine died right there. It appears my alternator wasn't working, too, as I didn't have enough battery to try cranking it after I got some coolant back in it. The engine lost no oil during this debacle, but it doesn't want to catch on cranking now. It sounds like something got pulled into the intake and damaged a valve or the headgasket is gone again.
Here is what I did wrong:
No air cleaner
Didn't give the car long enough to break in the headgasket and retorque the head bolts
Took the car on a long trip to a far away land (the beach, down Highway 26 in Oregon)
Please don't do these things. Towing and the cajoling of friends into helping you get your rig back home is expensive.
FWIW, the state troopers were really awesome about the whole thing. Yay for sitting in the back seat of a police car!