[DeTomaso] Shift Happens - Broken Motor Mount Bolt
David
david at msmcontractors.org
Tue May 15 12:06:22 EDT 2018
I get all my bolts from Caterpillars. Most of the time they are actually cheaper than box stores and you know the quality is top notch
David Finley
3659
> On May 15, 2018, at 10:59 AM, Ken Green via DeTomaso <detomaso at server.detomasolist.com> wrote:
>
> Is McMaster still a good source? Some of their stuff comes from
> Taiwan, but I thought that was OK?
> Ken
> __________________________________________________________________
>
> From: Larry-Ohio Time Corp <Larry at ohiotimecorp.com>
> To: 'Larry Stock' <larrys at panteraparts.com>; 'Mike Drew'
> <MikeLDrew at aol.com>
> Cc: 'De Tomaso List' <detomaso at server.detomasolist.com>
> Sent: Tuesday, May 15, 2018 5:55 AM
> Subject: Re: [DeTomaso] Shift Happens - Broken Motor Mount Bolt
> Fasteners are no longer made in NE Ohio (mom and dad worked at National
> Screw during the War) so one must be carful where you get replacements
> from. I have had problems with "big box" store bolts snapping when
> torque
> to spec.
> Fasteners in key locations should be sourced from quality suppliers.
> Larry (nuts) - Cleveland
> -----Original Message-----
> From: DeTomaso [mailto:[1]detomaso-bounces at server.detomasolist.com] On
> Behalf
> Of Larry Stock
> Sent: May 14, 2018 11:38 PM
> To: Mike Drew
> Cc: De Tomaso List
> Subject: Re: [DeTomaso] Shift Happens - Broken Motor Mount Bolt
> Mike not to bore everyone with a bunch of engineering specifications
> for
> each comparative bolt design, you all can read about all these details
> here at
> [2]http://tinelok.com/grade-5-vs-grade-8-fasteners/
> The conclusion basically sums it up;
> Getting back to the original question, awhich fastener grade should I
> use?a We hope itas very clear by now that grade 8 fasteners are far
> superior to grade 5 fasteners. If this is so, then why do the
> automotive
> manufacturers use some grade 5 fasteners? The automotive OEMas use what
> it
> needs to be safe and nothing more since there is a difference in cost
> between grade 5 and grade 8 (or metric 8.8 and 10.9). Since the OEMas
> manufacture millions of vehicles each year, the difference in a few
> cents
> per fastener adds up to a lot for them.
> Larry Stock
>> On 5/14/18, 7:37 PM, "Mike Drew" <[3]MikeLDrew at aol.com> wrote:
>> Larry,
>>
>> Grade 8 bolts are stronger in tension and weaker in shear. They are
> more
>> brittle, and they break when Grade 5 bolts bend.
>>
>> The fix is to use Grade 5 boltsaas originally installed (for a
> reason).
>> The engine subjects the bolts to shear loading and Grade 8 bolts will
>> snap when Grade 5 bolts distort. A distorted bolt is still doing its
> job
>> after a broken bolt isnat! (Thats also why A-arm bolts are Grade 5
>> instead of Grade 8).
>>
>> There are lots of other applications where Grade 8 bolts are
> appropriate.
>> It depends on the nature of the job they are being asked to do. But
>> neither Grade 5 or 8 bolts are abettera. They are instead adifferenta.
>>
>> The Ford engineer guys are no dummies.
>>
>> Scottayou should be able to support the engine from below (or suspend
> it
>> from above), then unbolt the bottom half of the engine mount, remove
> the
>> through bolt, and withdraw it. Then you can remove the other upper
> mount
>> bolt (hope it isnat broken too) then remove the upper mount. Then you
> can
>> determine if you can extract the broken bolt with an EZ-out. Frame
> rails
>> might make access difficult, so you may have to unbolt the other side
>> mount and raise it up with a hoist to get better access.
>>
>> If the bolt is broken off inside the block and the EZ-out doesnat
> work,
>> you may need to take the block to a shop that can do EDM, Electro
>> Discharge Machining, and have it zapped out. Or perhaps a machinist
> can
>> extract it for you. Dismantling the engine might be part of either of
>> those operations however....
>>
>> Mike
>>
>> Sent from my iPad
>>
>>> On May 14, 2018, at 11:04, Larry Stock <[4]larrys at panteraparts.com>
> wrote:
>>>
>>> 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"
>>> <[5]detomaso-bounces at server.detomasolist.com on behalf of
>>> [6]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: [7]scott at scottmeadphotography.com
>>>>
>>>> W: www.scottmeadphotography.com
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> References
>
> 1. mailto:detomaso-bounces at server.detomasolist.com
> 2. http://tinelok.com/grade-5-vs-grade-8-fasteners/
> 3. mailto:MikeLDrew at aol.com
> 4. mailto:larrys at panteraparts.com
> 5. mailto:detomaso-bounces at server.detomasolist.com
> 6. mailto:scott at scottmeadphotography.com
> 7. mailto:scott at scottmeadphotography.com
> 8. mailto:DeTomaso at server.detomasolist.com
> 9. http://server.detomasolist.com/mailman/listinfo/detomaso
> 10. mailto:DeTomaso at server.detomasolist.com
> 11. http://server.detomasolist.com/mailman/listinfo/detomaso
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> 14. mailto:DeTomaso at server.detomasolist.com
> 15. http://server.detomasolist.com/mailman/listinfo/detomaso
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