[DeTomaso] Shift Happens - Broken Motor Mount Bolt
jderyke at aol.com
jderyke at aol.com
Mon May 14 15:19:32 EDT 2018
Scott, check the rubber insulators between each motor mount. The design of the motor mounts weight-stresses one side of the rubber discs more than the other. Bolts then break when the rubber collapses into a wedge and bends the bolts- either gr-5 or gr-8. A time-honored temporary fix is to rotate the discs 180 degrees while waiting for new rubber to arrive. At least that way you can drive the car while you wait.
Cheers- J DeRyke
-----Original Message-----
From: Scott Mead Photography <scott at scottmeadphotography.com>
To: 'Larry Stock' <larrys at panteraparts.com>; 'De Tomaso List' <detomaso at server.detomasolist.com>
Sent: Mon, May 14, 2018 11:23 am
Subject: Re: [DeTomaso] Shift Happens - Broken Motor Mount Bolt
Well, Larry, I try not to scare the wife... too much!
-----Original Message-----
From: Larry Stock [mailto:larrys at panteraparts.com]
Sent: Monday, May 14, 2018 11:21 AM
To: Scott Mead Photography; 'De Tomaso List'
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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>
>
>
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-------------- next part --------------
Scott, check the rubber insulators between each motor mount. The design
of the motor mounts weight-stresses one side of the rubber discs more
than the other. Bolts then break when the rubber collapses into a wedge
and bends the bolts- either gr-5 or gr-8. A time-honored temporary fix
is to rotate the discs 180 degrees while waiting for new rubber to
arrive. At least that way you can drive the car while you wait.
Cheers- J DeRyke
-----Original Message-----
From: Scott Mead Photography <scott at scottmeadphotography.com>
To: 'Larry Stock' <larrys at panteraparts.com>; 'De Tomaso List'
<detomaso at server.detomasolist.com>
Sent: Mon, May 14, 2018 11:23 am
Subject: Re: [DeTomaso] Shift Happens - Broken Motor Mount Bolt
Well, Larry, I try not to scare the wife... too much!
-----Original Message-----
From: Larry Stock [[1]mailto:larrys at panteraparts.com]
Sent: Monday, May 14, 2018 11:21 AM
To: Scott Mead Photography; 'De Tomaso List'
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 havenAt sheared,
your
not driving anyway near your potential.
Larry
On 5/14/18, 11:12 AM, "Scott Mead Photography"
<[2]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 [[3]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, IA^1d 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-[4]bounces at server.detomasolist.com on behalf of
>[5]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: [6]scott at scottmeadphotography.com
>>
>> W: [7]www.scottmeadphotography.com
>>_______________________________________________
>>
>>
>>Detomaso Email List is not managed by POCA
>>Posted emails must not exceed 1.5 Megabytes
>>DeTomaso mailing list
>>[8]DeTomaso at server.detomasolist.com
>>[9]http://server.detomasolist.com/mailman/listinfo/detomaso
>>
>>To manage your subscription (change email address, unsubscribe, etc.)
use
>>the links above.
>>
>>Members who post to this list grant license to the list to forward
any
>>message posted here to all past, current, or future members of the
list.
>>They also grant the list owner permission to maintain an archive or
>>approve the archiving of list messages.
>
>
>
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References
1. mailto:larrys at panteraparts.com?
2. mailto:scott at scottmeadphotography.com
3. mailto:larrys at panteraparts.com?
4. mailto:bounces at server.detomasolist.com
5. mailto:scott at scottmeadphotography.com
6. mailto:scott at scottmeadphotography.com
7. http://www.scottmeadphotography.com/
8. mailto:DeTomaso at server.detomasolist.com
9. http://server.detomasolist.com/mailman/listinfo/detomaso
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