crossmember update (more pics..)

[haygood@aemail4u.com (Haygood)]

Wow, I already had my torch lighted, but that actually makes a lot of sense.  Logic is very flame resistant.

BH

--- "Dan Bubb" <jdbubb@ix.netcom.com> wrote:
>I have a theory here, so y'all get out your flame throwers!
>The theory is based the fact that I've had my Scirocco for 18.5 years and
>have always driven it hard. Not slamming shifts, but alot of WOT and high
>RPM downshifts. In other words, I've had as much opportunity to crack my
>chassis as anyone and to date, with 240,000 miles, NO cracks.
>The two powertrain mounts that do the most to dictate the position of the
>engine are the side mounts. They sag with time. The rear and front mounts
>can be adjusted to accomodate this sag to some extent. But, if they're not
>adjusted they end up supporting most of the weight when their main function
>(imho) is to resist powertrain torque. So, if you never adjust your front
>and rear mounts and don't replace your passenger side mount regularly, you
>have an abnormal load on the front and rear mount. The front is the least
>able to take the load, so cracking results.
>Did you all know the front mount was an after thought. The Scirocco was
>originally produced without a front mount. A retrofit was added to the '75
>Scirocco, and the current mount design started in the '76.
>So, that's my theory! Adjust and replace your powertrain mounts often.
>Dan
>
>>If this were the case, why is
>> my crossmember cracked on the bottom rather than the top? Tension causes
>> cracking, not compression (or at least it takes a great deal more
>> compression to crack sheet metal in general)
>>
>> Could you clarify your statement?
>>
>> Thanks,
>>
>> -Toby
>>
>> On Mon, 3 Mar 2003, Allyn wrote:
>>
>> > > First of all, the force vector acting on the crossmember points
>straight
>> > > down.
>> >
>> > umm, during a downshift perhaps, but the major load is in the upward
>> > direction, during acceleration. i think this makes your whole
>explination
>> > backwards (as far as tensile/compressive stresses), but it will work
>just
>> > the same.
>> > Al
>> >
>> >
>>
>>
>>
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>
>
>
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