[urq] Head question 2

[Andrew B]

Little bit of an update:
After replacing a frozen caliper yesterday, I took the car out for a
spin around the neighborhood (1/2 mile loop).  On the first and second
lap, I was leaving a large trail of white smoke behind me.  It
dissipated fairly quickly, but not immediately.  By the third lap, the
cloud was gone, and there was no trail.  Do these cars just burn
coolant when they're cold?  Could the head be making a better seal
after it warms up a little?

I'm making plans to dig into the engine and replace the
gasket/whatever else is needed ASAP, but for the meantime I'm still
driving, but not a lot.  How bad of an idea is this?  Am I going to
cause more damage to the block (assuming I'm going to replace/repair
the head when I get in there)?  Will it survive until I can get around
to it?

Thanks for all your help guys,
-Andrew