Expert: jack bahm - 7/3/2008

Question
get's hot as a two dollar pistol , new 4 fin rad , new water pump, 180degree new thermo, flushed and backflushed ,21 lb test on radiator with plugs out , no loss; start it up , drive three or four miles into town ,blew off radiator hose this am.bought off ebay from Minn. did not have thermosat in it when received in March also installed new 6 blade fan !! am flustered any help would be appreciated , can't tell if block has been cracked and filled ??

Answer
You may have combustion products getting into the water jacket.  With the cap off, rev the engine and see if you get any bubbles.  If you do, then you have a head gasket prob. or worse.
You are making steam in the engine quickly.  Either the water is not flowing, or it is not getting to the hot spot in the engine.  Blockage in the water jacket???
Pump impeller not turning.  Loose on the shaft???
New radiator got plugged after a few miles.  I did this once, and it turned out I paid $400 for a filter that caught all the crap as soon as I started it up.  Check to see if there is a lot of junk running around in the water jacket.  
That about all I can think of.  With a Model A, it's always a plugged rad.  Hope yours is not plugged already.  A hard back flush might help, but they don't do very much most of the time.
Good luck
jack