I don't really know what the machine shop did as far as cleaning the block. I do know that when I tore the engine down prior to sending it off to the machine shop it was absolutely full of rust. And when I did the rebuild I looked inside and it seemed to be clean. And after I mounted it on the frame and got the radiator hooked up I filled the radiator and pulled the drain plug at the rear of the engine and got good flow there. Also where the temp sender goes at the top of the block. And I filled/drained a few times before adding antifreeze.
I'll get some acid and give it a shot. Probably fill/drain several times. See if that clears things up. Part of the problem is that it sat for quite a while since the rebuild, like a few months. But it did have water/antifreeze mix in it.
Tim
I am currently digging back in to a 1953 3800 (one ton) with a nine foot bed. I've owned it since 1979, and drove it until 1982 (or so). My wife got me involved in restoring it back in 2002, got the body removed and the frame redone, then things came up. Now I am retired and starting again. If anyone is interested I have photos on Imagur (
https://timwhiteblues.imgur.com/ ). I live way back in the woods in the Ozarks on 40 acres at the end of a 2 1/2 mile private road.
Tim
