<VV> 180 block for a late 140 eng

[RoboMan91324@aol.com]

Hi Dick,

You can interchange pretty much any LM crankcase (block) with another LM.  
The 180 crankcase is more valuable only if someone wants to have a numbers 
matching engine.  The same thing goes with 140s, 150s and possibly others for the 
hard core "numbers matching" guys.  If it is for your own use, and you don't 
care about resale, just make the change.  If you want to resell it at some 
point, having a 180 crankcase with 140 parts might lead someone to ask himself what 
other mismatched parts might be in there.  Check to see if any of the 
journals show evidence of a spun bearing or other damage.  You also need to see if 
the two halves of the 180 match up.  I believe that they were align bored and 
machined as a set at the factory.  You may have a half from one engine with the 
stamped number on it and a half from some other engine.  Bolt the halves 
together to see if the upper and lower surfaces were machined together by running 
your fingernail over the clean line between them.  The same thing goes for the 
points where the halves meet in the bored holes for the crank and cam.  Even a 
slight misalignment in the crank and cam holes can be catastrophic while a 
slight step in the upper and lower gasket surfaces can cause leaks.

Doc
~~~~~~~~~~~~~~
In a message dated 11/23/2004 4:23:03 PM Pacific Standard Time, 
virtualvairs-request@corvair.org writes:

> Message: 6
> From: CORVAIR412@aol.com
> Date: Tue, 23 Nov 2004 18:10:53 EST
> To: VirtualVairs@corvair.org
> Subject: <VV> 180 block for a late 140 eng
> 
> I took a 140 engine out  of a 1967 500 auto.   Not sure that it  should have 
> been there.     It seems the person who did work on  the 140 engine dropped 
> a bolt in the crank and cam area.  It got caught and  busted both sides of 
> the block. I have  a 180 block with out crank or  cam.  Can the case be used to 
> rebuild a 140 engine?  I would use the  heads of the 140 and rebore the jugs 
> to .20 or .30 and use a new cam and check  the crank.  Or would it be better 
> to take a 110 engine to do a  rebuild?                Dick Tetzloff  
> _Corvair412@aol.com_ (mailto:Corvair412@aol.com)