Interesting Engine thing you might already know

Aaron D. IL

Hudson engineers thought of everything. I had the head off a Pacemaker 232 engine block that's never been rebuilt because I managed to bust some head bolts. Anyway I was checking drill sizes and noticed that a standard drill bit (forget what size) fits through the holes on a cast-iron head loose at the outside edges but as you set it through the holes closer to the center of the engine it's tighter and in the middle of the engine the drill bit doesn't even fit through the stud holes. I guess it was machined this way to conpensate for torqing the head down and or heat expansion. otherwise the stud holes would be off after being torqued down. Those Hudson engineers thought of everything! LOL You have to marvel at some of these castings.

[Deleted User]

Aaron D. IL wrote:

Hudson engineers thought of everything. I had the head off a Pacemaker 232 engine block that's never been rebuilt because I managed to bust some head bolts. Anyway I was checking drill sizes and noticed that a standard drill bit (forget what size) fits through the holes on a cast-iron head loose at the outside edges but as you set it through the holes closer to the center of the engine it's tighter and in the middle of the engine the drill bit doesn't even fit through the stud holes. I guess it was machined this way to conpensate for torqing the head down and or heat expansion. otherwise the stud holes would be off after being torqued down. Those Hudson engineers thought of everything! LOL You have to marvel at some of these castings.

Aaron

You cannot be that bored are you? If you are igot some Hudson parts that need cleaning.

Chuck G.