I'm trying to cover my bases before Thursday. First I'd like to make sure

           I don't have a blown head gasket...secondly a waterpump malfunction.

              Here's the deal, back in the spring I had put the 'stat in backwards

          and it would heat up(210 plus). I corrected that by taking it out.)Summer

          was coming!) Truck ran fine for several weeks staying around 150/160.

          One day it jumped to 210/230 in a 1/2 mile of driving. I figured it was low

          water.. put some in...still hot230/240...I have an aftermarket radiator and

          the top radiator hose may have been higher than the radiator inlet(L-shaped)

          so I trimmed the 'stat side shorter and bingo...it hasn't run hot until yesterday.

          I drove 10-12 miles wA/C on it stayed 160/170. Pulled in shop to do a few things,

          backed it out 1 hr later and it went to 210 in3/4 minutes! I figured I had an air

          bubble in it...but why now? I bought a radiator drain cock and put it in the heater

          hose outlet on the water pump thinking I might bleed the air out......

               I cranked the truck with the cock open and then closed but no water comes out

          it seems that it's not circulating, The inlet side of the radiator gets hot enough

          to turn on my electric fan(190 turn-on)The outlet side is cool to the touch and

         the air being pulled thru the radiator is cool! Can a waterpump quit pumping?

              I'll appreciate any and all suggestions.

                                                    Thx,

                                                     Bill

                                                   

Bill

Pelham,Al