Plastiguage...
On Wed, 20 Sep 1995, Denise Thorpe wrote:
> Graham Naylor asked:
>
> > The engine has been apart for about 10 years, all the major parts are
> > there but with one problem. Over the years the Main bearing Caps have
> > become separated from the block, three of the five were either in
> > place or are easily identified but the other two are identical
> > (positions 2 and 4) and have become mixed up. What is the best way of
> > ensuring they are replaced in the original positions.
>
> If you have the block line bored, it won't matter where the main caps
> originally sat. It's also a good idea to have the rods sized and the
> block surfaced, along with the usual machining.
>
> If you want to do the minimum machining, you can get these things, I
> can't rememember the name; they're like threads of Play-Doh. You put
> a piece on the face of each journal bearing, assemble everything, torque
> it to spec, and then disassemble everything. The width of the squashed
> thread tells you the clearance in that journal. If you put the two main
> caps in question on, and the widths of the threads were very different,
> you'd know that you had them in the wrong places. But if the widths were
> the same, it wouldn't tell you anything unless switching them made the
> widths very different. I hope this makes sense. Does anybody know the
> name of these things?
>
> Be sure to clean out the oil gallery that runs the length of the block.
> It can be accessed from the oil filter hole.
>
> Denise Thorpe (whose last name suffers from the Middle English gratuitous
> use of the letter "e")
> thorpe@kegs.saic.com
>
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