82 Diesel Vanagon. After a lot of hard starting I finally couldn't
get it going and the battery was draining, so I found two shot glow
plugs and replaced them.  After another episode of hard starting off
another battery, it finally fired and seemed to cough up a monster-
sized "hairball of smoke."
After hard starting with no combustion, is this normal?
It took a little while to totally clear up and now seems fine, but I am
still concerned about the hard starting and the crazy exhast.