[DeTomaso] Shift Happens - Broken Motor Mount Bolt

[Richard Greenblum]

May be the engine's torque during either hard acceleration or deceleration
caused the upper half of the motor mount to rotate slightly.

Richard
Austin, TX

-----Original Message-----
From: DeTomaso <detomaso-bounces at server.detomasolist.com> On Behalf Of Larry
Stock
Sent: Monday, May 14, 2018 1:21 PM
To: Scott Mead Photography <scott at scottmeadphotography.com>; 'De Tomaso
List' <detomaso at server.detomasolist.com>
Subject: Re: [DeTomaso] Shift Happens - Broken Motor Mount Bolt

If the other 3 engine bolts are intact, then why has this particular one
shifted off its center, is now that becomes the question. Regardless they
should have all been upgrades 30 years ago. Now you have some more work to
do. If the others are still grade 5 bolts and still haven’t sheared, your
not driving anyway near your potential.
Larry

On 5/14/18, 11:12 AM, "Scott Mead Photography"
<scott at scottmeadphotography.com> wrote:

>Larry, that's the crazy thing - only the one bolt has sheared. My guess 
>is that when the engine was last installed on Maui, the mechanic 
>re-used the original bolts and snapped it (over torqueing it).  The 
>bolts are grade 5 (three lines).
>
>-----Original Message-----
>From: Larry Stock [mailto:larrys at panteraparts.com]
>Sent: Monday, May 14, 2018 11:04 AM
>To: Scott Mead Photography; 'De Tomaso List'
>Subject: Re: [DeTomaso] Shift Happens - Broken Motor Mount Bolt
>
>There should be 2 bolts Scott, so I assume you sheared the other one also.
>Since you so good with that camera, shoot me a photo of the other side 
>as well, I¹d like to see what the bolt heads indicate what grade of 
>bolts you had in there. Factory came with grade 5, and after Radial 
>tires were invented and installed the true nature of the difference of 
>a monocoque vs Unibody became evident with the shearing of the grade 5 
>bolts with the engine being engineered as stressed member of the 
>chassis. The fix has been to use grade 8 or higher to keep that engine 
>as a stressed member brace of the chassis design. More Grip, more stress.
>
>Larry
>
>On 5/14/18, 10:47 AM, "DeTomaso on behalf of Scott Mead Photography"
><detomaso-bounces at server.detomasolist.com on behalf of 
>scott at scottmeadphotography.com> wrote:
>
>>   Hi Everyone -
>>
>>
>>   I was under the car this weekend, diagnosing my paperweight of an A/C
>>   system, when I noticed something a little unnerving: The right-front
>>   motor mount bolt had sheared off in the block, and the motor had
>>   shifted. With the hole in the motor mount no longer lining up with 
>>bolt
>>   remnants, there's no way I can "easy out" the bolt. Aside from pulling
>>   the engine/ZF, can I take out the other bolt, loosen the bolts on the
>>   other side and (using a block of wood under the oil pan), jack the
>>   engine up a bit to re-align or remove the motor mount to extract the
>>   bolt? Are there any other options I haven't thought of?
>>
>>
>>   Thanks,
>>
>>
>>   Scott (caretaker of 5638)
>>
>>
>>
>>   SMP-Slogo
>>
>>   PO Box 1190
>>
>>   Lake Arrowhead, CA 92352
>>
>>   T: 626-660-8075
>>
>>   E: scott at scottmeadphotography.com
>>
>>   W: www.scottmeadphotography.com
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