Hi Dave...
I took the carb/reg. off my .45 for cleaning. (the engine was given to me by an older gentleman, and had sat un-used for years )
Now, when I put it back together, I can only just barely snug the thru bolts before the barrel binds badly!
I know the bolts aren't anywhere tight enough to keep from vibrating out, and the fuel/press. will probably leak too...

What happened, or what am I doing wrong?

Thanks...Tom

The carb body and /or crankcase is distorting when you tighten the screws. It is a common problem with the 45.

The best fix is to lap the barrel to the housing while slowly taking up the screws until they are tight. The engine must be stripped completely to do this. You can use regular toothpaste as a lapping compound and carefully wash it out when finished.

The only other fix is replacement of one or both pieces.

That's what I thought I'd have to do...

Thanks Dave

Good Luck!

Thanks Dave...I'll take my time, and I'll get 'er...
I was just wondering though, that maybe the gasket will compress, and change things...

We'll find out I guess huh?
I'll let you know...
Thanks again

That's why you tighten it gradually while lapping until the screws are tight. It's not as big a deal as you might think.