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Great resource to note!
What I still don't understand is why or how polyurethane bushings
liquefy in place.
- Bob Mann, '68 2000 Solex
On 10/18/2018 3:02 AM, David Bloyer via Datsun-roadsters wrote:
> Just to close the loop on this issue for the record and to hopefully help
> anyone in the future with this problem, I am sharing the following solution.
>
> I was contacted off list by a member, M. Alsup, who was able to offer up
> custom turned 90 â??hardâ?? polyurethane bushing inserts with inner sleeves
> to my measured needs. These were installed easily using generous amounts of
> Prothane lube and a large â??Câ?? clamp to â??pressâ?? in place. My car is
> back on the road without having to entirely disassemble the rear end which is
> a huge plus. I did one side at a time with a floor jack holding the spring
> end as it was lowered or raised out of the mounting position. Cleaning out
> the messy liquefied polyurethane was a supreme hassle, however. The turn time
> from â??orderâ?? to delivery was within a week and the quality was excellent.
> Price was reasonable knowing that these were custom created.
>
> Mr. Alsup also provides inserts for the torque tube bushings, which I have
> not ordered, but feel I should given the positive experience with my specific
> needs.
>
> So noted for the record.
>
>
>> On Aug 31, 2018, at 5:29 AM, David Bloyer <david_bloyer@hotmail.com> wrote:
>>
>> I have had the unfortunate luck of having the polyurethane go to liquid and
>> drain out on 4 year old replacement leaf springs with aftermarket pressed in
>> front bushings. The vendor no longer sells this version, so thatâ??s good
>> for others, but not my luck.
>>
>> The vendor indicated that I should remove the springs, press out the old
>> ones and press in a new vulcanized version they sell.
>>
>> I was curious if anyone had ever tried (or has thoughts about) a custom
>> Delrin sleeve (there are vendors on eBay that can make these) that would fit
>> in the area of the gap between the outer bushing and the inner one (I.e.:
>> where the polyurethane used to be)?
>>
>> I know that the Delrin would not be as compliant as the polyurethane, but it
>> would save a heck of a lot of work to find a replacement for this gap
>> instead of tearing the back end apart again.
>>
>> If this is a viable option, anyone know the approximate diameters (outer and
>> inner) for the polyurethane â??gapâ??? Iâ??d measure mine exactly for final
>> order, but Iâ??d use this info to see what approximate cost is likely for
>> the vendor to make a sleeve.
>>
>> Car is a 1968 2000, btw.
>>
>> Comments appreciated and thanks in advance.
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<p>Great resource to note! <br>
</p>
<p>What I still don't understand is why or how polyurethane bushings
liquefy in place.</p>
<p>- Bob Mann, '68 2000 Solex</p>
<p><br>
</p>
<br>
<div class="moz-cite-prefix">On 10/18/2018 3:02 AM, David Bloyer via
Datsun-roadsters wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CY1PR0101MB1116B6CA7A097E3957E38347E1F80@CY1PR0101MB1116.prod.exchangelabs.com">
<pre wrap="">Just to close the loop on this issue for the record and to
hopefully help anyone in the future with this problem, I am sharing the
following solution.
I was contacted off list by a member, M. Alsup, who was able to offer up custom
turned 90 â??hardâ?? polyurethane bushing inserts with inner sleeves to my
measured needs. These were installed easily using generous amounts of Prothane
lube and a large â??Câ?? clamp to â??pressâ?? in place. My car is back on the
road without having to entirely disassemble the rear end which is a huge plus.
I did one side at a time with a floor jack holding the spring end as it was
lowered or raised out of the mounting position. Cleaning out the messy
liquefied polyurethane was a supreme hassle, however. The turn time from
â??orderâ?? to delivery was within a week and the quality was excellent. Price
was reasonable knowing that these were custom created.
Mr. Alsup also provides inserts for the torque tube bushings, which I have not
ordered, but feel I should given the positive experience with my specific needs.
So noted for the record.
</pre>
<blockquote type="cite">
<pre wrap="">On Aug 31, 2018, at 5:29 AM, David Bloyer <a
class="moz-txt-link-rfc2396E"
href="mailto:david_bloyer@hotmail.com";><david_bloyer@hotmail.com></a>
wrote:
I have had the unfortunate luck of having the polyurethane go to liquid and
drain out on 4 year old replacement leaf springs with aftermarket pressed in
front bushings. The vendor no longer sells this version, so thatâ??s good for
others, but not my luck.
The vendor indicated that I should remove the springs, press out the old ones
and press in a new vulcanized version they sell.
I was curious if anyone had ever tried (or has thoughts about) a custom Delrin
sleeve (there are vendors on eBay that can make these) that would fit in the
area of the gap between the outer bushing and the inner one (I.e.: where the
polyurethane used to be)?
I know that the Delrin would not be as compliant as the polyurethane, but it
would save a heck of a lot of work to find a replacement for this gap instead
of tearing the back end apart again.
If this is a viable option, anyone know the approximate diameters (outer and
inner) for the polyurethane â??gapâ??? Iâ??d measure mine exactly for final
order, but Iâ??d use this info to see what approximate cost is likely for the
vendor to make a sleeve.
Car is a 1968 2000, btw.
Comments appreciated and thanks in advance.
</pre>
</blockquote>
</blockquote>
<br>
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