Water in oil/brown smoke

[Nathan Ray]

A couple of days ago I started up the 86 4kq in the cold, (about zero 
degrees F) and it was acting real wierd.  While it was warming up it started 
to put out some really white smoke which then proceeded to turn slightly 
brown, and I then turned it off.  I thought it might be burning oil or 
something because it was so cold and when I opened the oil cap it had the 
white paste on it that collects when water gets in mobil 1.  I've had this 
happen before because of a torn breather hose, but all of my hoses/lines are 
sealed now and I don't know where the moisture would have come from.  Does 
this mean that I have a bad head gasket?  Is there any way to tell this for 
sure?  What can I do to find out, or what is another way that water could 
get in the oil.  The motor has 240k or so unknown miles on it so would a 
head gasket just randomly go bad like this?  I don't drive the car hard at 
all so I'm not sure why this would have happened.  Hopefully you guys have 
some suggestions/btdt's for me because I don't want to do my first head job 
over winter break.
Thanks
Nate Ray

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