96 LC - Coolant leaking into engine

[Volos]

Hey I'm new here, but not to Land Cruisers or working w/them. I put a new head gasket in 96 LC (standard 6-in line 4.5) 80k miles ago. Yesterday I had a very sudden hard time starting (I've never had a partial hydro-block but I can imagine that's what this sounds like). I finally get it to turn and low and behold I'm blowing white smoke and the car is shaking violently (I replaced the radiator 20k ago, don't think that has anything to do with it). After I'm looking around the engine for about 10 min (running) I notice I'm boiling coolant so I shut it off (have since replace the coolant).

I assumed it was the head gasket again, but when I popped the top off the block it looked fine. Not great. Now I assume my possible problems for coolant in the cylinders are:
1) Came through the head gasket
2) Came through a cracked or eroded head
3) Entered through some intake cooling / warming path (unlikely, it's never that easy, and I've really checked the lines)

Anyone got any recommendations as to how to really trouble shoot which problem it is? I was hoping visual inspection would give me the answer but nothing was obviously wrong. Or perhaps something I didn't think of (it was not blue smoke, it was definitely coolant there is no denying the smell)?

Thanks,
Volos

[bryan062087]

post this question on ih8mud.com in the 80 series section