[DeTomaso] Magnaflux cracks - now what?

Larry Finch fresnofinches at aol.com
Tue Nov 8 16:47:57 EST 2016


I have not seen the block in person.

Here is a close-up photo provided by the shop. 

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Sent from me using a magic, handheld electronic gizmo. 

> On Nov 8, 2016, at 1:26 PM, Larry Weston <lplugw at hotmail.com> wrote:
> 
> Just curious, now that you know where to look, are the cracks visible?
> 
> 
> Sent from my iPhone
> 
>> On Nov 8, 2016, at 4:12 PM, Asa Jay Laughton <asajay at asajay.com> wrote:
>> 
>>  My opinion....  new block.
>>  Those head bolts go into the water jacket as I recall but that's not
>>  the real problem here.  Those are HEAD BOLTS.  So picture this.  The
>>  cracks grow under stress and eventually break a piece free.  Now the
>>  head bolt no longer has sufficient clamping force to the block and more
>>  problems will ensue.
>>  Just me thinking out loud.
>>  Asa
>>  Sent using Jedi Mind Tricks
>> 
>>  Larry Finch via DeTomaso <detomaso at server.detomasolist.com> wrote:
>>  All,
>>  Magnaflux testing of my original block has shown a total of five cracks
>>  (LH/RH) out of six possible, as shown in the photo below. Cracks are
>>  within the marked white lines.
>>  Cracks are from the water jacket to the head bolt threads. No cracks
>>  running into cylinders.
>>  I had taken note that some of the head bolts showed traces of coolant
>>  on them when removed, but no signs of any rust on any of them.
>>  Planned engine build is 383 or 408 hydraulic roller stroker using Scott
>>  Cook heads and intake with carburetor.
>>  Do those cracks mean the original block is now history?
>>  In 15 years of ownership I have never heard of Cleveland's exhibiting
>>  cracks in this manner.
>>  Seeking the Family's wisdom and advice.
>>  Thanks,
>>  Larry
>>  Sent from me using a magic, handheld electronic gizmo.
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