Its been awhile since I posted. Last winter my 96 RMW overheated when it was subzero. I expected to find a stuck thermostat but tracked it back to simply low coolant. I had a mechanic check it out and he could not find a leak, and suggested it had a blown head gasket. I've put some miles on it since then, and it runs fine, except its losing about a half gallon of coolant every 250 miles.
I have some broken exhaust manifold bolts and I'm thinking about pulling the heads to repair those and see if I can find the leak. Thoughts?