[DeTomaso] Magnaflux cracks - now what?

[Sean Korb]

Yeah... it's junk :(  I had an FE block that cracked there and you
could tell when the bolt was clamped down it left an impression of the
crack in the gasket.  That was the source of the leak.  The clamping
forces are so high, ... I mean I really tried a lot of stuff... JB
Weld and multiple types of gaskets.  It was wishful thinking.

Maybe cut those cylinders off and weld another one on for a V10?  I
might have an extra block kicking around in the garage.  I can't
remember if it met a good home or just got burried behind all the
Pontiac OHC 6 parts.


On Tue, Nov 8, 2016 at 4:47 PM, Larry Finch via DeTomaso
<detomaso at server.detomasolist.com> wrote:
> I have not seen the block in person.
>
> Here is a close-up photo provided by the shop.
>
>
>
>
> 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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-- 
Sean Korb spkorb at spkorb.org http://www.spkorb.org
'65 Suprang,'68 Cougar,'78 R100/7,'60 Metro,'59 A35,'71 Pantera #1382
"The more you drive, the less intelligent you get" --Miller
"Computers are useless.  They can only give you answers." -P. Picasso