I went out today and bought new head bolts and will replace all of them.
None of them had washers when I tore apart the engine, and I didn't use washers when I assembled. How ever I bought some thick heavy washers when I got the bolts.
I thought I had cleaned the holes well enough before assembly, but I will check each hole when I swap bolts to make sure.
I used short lengths of all thread in two holes to align the head during assembly, and hand tightened each bolt before I did any torquing, so they must have been pretty well lined up, I would think.
I will measure the depth of each hole to make sure there is no bottoming out. I suppose there might have been some oil in the holes, but only what might have been on the bolt when I installed them. And I didn't use much oil, just dipped them in some oil then wiped them by turning through a clean shop rag.
I think it is possible that these old bolts have been used for a couple of rebuilds, and might have gotten too stretched out, maybe weakened from being torqued down many times. It was obvious when I tore apart the engine that someone had done some work inside before, so I know of at least one rebuild.

I'm going to replace every bolt, being very careful on inspection of the hole in the block, and hope for the best.

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