Oil dipstick tube install?

340sFastback said

Hit that tube with some 80 grit sand paper to take off some of that chrome. Then put tube in the freezer for an hour, that will cause the metal to shrink slightly. Then use a heat gun to heat up the block to expand it slightly. This will give you a few thousands of clearance. I slid a small socket down the tube that fit snug around the collar, then stacked sockets up the tube, and tapped it in from the top.

Click to expand...

Metal, bearing races, dipstick tube, etc.. in the freezer to shrink... yes.

But, Hmmmm... many people also say heat the hole in the block to expand it, but in the case of putting heat around a hole in an engine block, my thoughts are that the hole would constrict, since, it seems to me, the expanding, heated, metal would more easily expand toward an empty cavity (the hole), than expand into the cold, restricting, solid metal of the entire block. Heating a simple washer, or ring... then yes, I believe the hole would expand. I think of it this way... if you heated the entire block in a furnace, my brain tells me that any small holes in the block will constrict (heating metal expands toward least resistance). When I put a heat on a bound stud, I don't heat the surrounding metal, just the stud... to expand it before letting it cool and torquing it out. Food for thought and opinions anyway.