<VV> turn my crank

[Jim Houston]

A friend of mine used to own an Aircraft crankcase overhaul shop.  They 
would fix cases with oversized bearing saddles (crank and cam) by 
welding the bearing saddles and then align boring the case back to 
standard.  I would suspect that you might be able to get a case fixed by 
one of these shops (DIVCO in Oklahoma is one)...  BUT,  it won't be 
cheap (think "airplane")...

Jim Houston
Lithia, FL
'65 Monza Coupe
'66 Corsa 'Vert (group red)

corvair at mts.net wrote:
> One thing I can suggest:
>
> * get shop to look at crank and estimate how much they will need to turn it - likely they will say .010 undersize.
> * get a set of .010 (or the appropriate undersize) bearings and install them in your block.
> * measure the diameters inside your bearings as installed.
> * get the shop to grind the crank the appropriate size to get the bearing clearance you want - maybe it'll be .009 undersize or something like that.
>
> Reason being - both me and a friend are in the situation where we have .010 bearings and .010 U/S cranks, yet we have excessive bearing clearance when the crank is installed, because the holes in the block are very slightly oversized.
>
> And I would sure like to hear how people have resolved this - and I need to hear it like "I've done this six times, and it's worked" as opposed to "I hear you can do this - and it works" or "I hear that doing **** doesn't work"....
>
> thanks people
> Les
> corvair at mts.net
> (now in my 11th year of VV membership)
> ========
> Message: 3
> Date: Thu, 2 Nov 2006 17:54:23 -0800 (PST)
> From: Gary Moore <tdrinkr at yahoo.com>
> Subject: <VV> turn my crank
> To: virtualvairs at corvair.org
> Message-ID: <20061103015423.55167.qmail at web31302.mail.mud.yahoo.com>
> Content-Type: text/plain; charset=iso-8859-1
>
> The machine shop called today and said my crankshaft
> was need of turning. The problems he had found
> corresponded to the problems that I saw when I tore
> down the engine. The bearings in first journal were
> discolored and #2 piston rod didn't want to separate
> from the crank. So I think the guy was telling the
> truth.  My question is, and I will be showing my
> ignorance here, what is done when a crankshaft is
> turned? And what are the consequences of doing this?
> I.e. will over-sized bearings be needed?
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