<VV> Never saw This Before

[Mark Durham]

Brian, is the block correct for the 140? I pulled a set of main bearings
out of my 62 102 several years ago that was flanged on one side and not the
other. GM put some blocks together that way from the factory back in 62,
and I suppose those bearings could fit in any block if found on the
aftermarket. It did not seem to make a difference on operation, those mains
had 47 years and 69K miles on them and they we still new tolerances at all
four journals and on run out.

I was a bit nervous wondering why they did this when I installed a set with
full flanges on both sides, because was there a problem with the case? As
it happens, no,my clearances were within factory limits on runout there for
both halves.

Mark Durham
62 Monza 900 Coupe
Hauser Idaho



On Sun, Oct 6, 2013 at 3:28 PM, Brian <bmoneill at juno.com> wrote:

> I'm disassembling a 65 140 engine for a new club member.  He recently
> bought this CORSA convertible but it ran very poorly.  Inspection showed a
> dropped valve seat on #5. That was only the beginning of the issues.  The
> flywheel retaining ring was missing.  The pilot bushing was so worn, I
> thought it wasn't there.  Tons of blue and red silicone on every
> conceivable bolt. The real surprise came when I spilt the case.  In
> addition to a toasted cam, I found that only one half of the case had the
> correct flanged bearing.  The other half had a regular main bearing shell.
>  I can't identify the bearing.  No size markings, i.e. 'STD, .010, etc.
> Also can't identity the manufacturer.  The bearing are stamped "DAZ".
> Am I missing something here?  Has anyone ever seen this before?
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-- 
Mark Durham
Hauser, Idaho
62 Monza coupe Red/Red 4 speed