Difference in factory AC brackets

Hello Everyone,
As I mentioned in my previous response to Greg, I discovered there are different AC mounts even from the factory.
Please attached photos.
1) They both appear to have the same mounting bosses to match the head except the center bolt is shorter on the
earlier mount. Part of this is due to revisions in the casting. The photos are a bit misleading as one of the mounting
bolts is not visible on the later version. They have the same number of bolts. Steel bracket with adjusters are identical
for both.
2) The main compressor mount bolts are the same size on the later bracket and appear better reinforced with cast
ribs. The earlier version does have heavier (thicker) walls in this section. Later uses Allen head bolts. Earlier has one
Allen head and one (smaller) hex head bolt.
3) Viewed from below, the crescent shaped section which is normally under the compressor are cast with a supporting
rib on the later version. This would suggest the area needed reinforcement. However, viewed from the top, it appears the
earlier one has a heavier casting in this section.
4) The later version is much lighter. No doubt this is due to the casting on the large flat area below the compressor
support. The earlier version is solid aluminium. The later is crisscross with cast ribs.
IMHO, it would be a mistake to assume the later version is better. I have never seen a failure on these mounts in the 30 or
so T3's I have owned. My friend who owns a local VW repair shop said the same thing. He works on 3-4 T3's per day. His
shop is open 5 days/52 weeks a year. That is a quite a lot of T3 experience. Perhaps VW redesigned the mount for weight
more than anything else. If someone is curious I can weigh the brackets determine difference. I was unable to find any P/N's
on the castings.
Before you procure one of these factory brackets, it might be a good idea to ask your vendor which one he/she is selling.


--
BenT
Maybe they are just different due to different suppliers?


> BenT Syncro <syncro@gmail.com> wrote:
>
> Hello Everyone,
>
> As I mentioned in my previous response to Greg, I discovered there are
> different AC mounts even from the factory.
> Please attached photos.
>
> 1) They both appear to have the same mounting bosses to match the head
> except the center bolt is shorter on the
> earlier mount. Part of this is due to revisions in the casting. The
> photos
> are a bit misleading as one of the mounting
> bolts is not visible on the later version. They have the same number of
> bolts. Steel bracket with adjusters are identical
> for both.
>
> 2) The main compressor mount bolts are the same size on the later
> bracket
> and appear better reinforced with cast
> ribs. The earlier version does have heavier (thicker) walls in this
> section.
> Later uses Allen head bolts. Earlier has one
> Allen head and one (smaller) hex head bolt.
>
> 3) Viewed from below, the crescent shaped section which is normally
> under
> the compressor are cast with a supporting
> rib on the later version. This would suggest the area needed
> reinforcement.
> However, viewed from the top, it appears the
> earlier one has a heavier casting in this section.
>
> 4) The later version is much lighter. No doubt this is due to the
> casting on
> the large flat area below the compressor
> support. The earlier version is solid aluminium. The later is crisscross
> with cast ribs.
>
>
> IMHO, it would be a mistake to assume the later version is better. I
> have
> never seen a failure on these mounts in the 30 or
> so T3's I have owned. My friend who owns a local VW repair shop said the
> same thing. He works on 3-4 T3's per day. His
> shop is open 5 days/52 weeks a year. That is a quite a lot of T3
> experience.
> Perhaps VW redesigned the mount for weight
> more than anything else. If someone is curious I can weigh the
> brackets determine difference. I was unable to find any P/N's
> on the castings.
>
> Before you procure one of these factory brackets, it might be a good
> idea to
> ask your vendor which one he/she is selling.
>
>
> --
> BenT
On Thu, Jan 28, 2010 at 12:31 PM, <plander@optusnet.com.au> wrote:

Maybe they are just different due to different suppliers?
I can't say, Phill. Merits further research on my part since I probably have access to viewing larger sample than most folks. So far today, I looked at six T3's with AC's. Every single one had the type I referred to as the "later version". I do have to consider that every van I looked at today are post-86 which is the latest group imported to the US.
I will keep looking.
--
BenT
The main thing is Ben, have you seen either type fail?

Phil


> BenT Syncro <syncro@gmail.com> wrote:
>
> On Thu, Jan 28, 2010 at 12:31 PM, <plander@optusnet.com.au> wrote:
>
> >
> > Maybe they are just different due to different suppliers?
>
>
> I can't say, Phill. Merits further research on my part since I probably
> have
> access to viewing larger sample than most folks. So far today, I looked
> at six T3's with AC's. Every single one had the type I referred to as
> the
> "later version". I do have to consider that every van I looked at today
> are
> post-86 which is the latest group imported to the US.
>
> I will keep looking.
>
> --
> BenT
No, Phill. I checked with my friend with the shop. He has never encountered any AC bracket failures beside the occasional stripped bosses buggered up by careless mechanics.


BenT

Sent from my mobile device

On Jan 28, 2010, at 5:43 PM, plander@optusnet.com.au wrote:


The main thing is Ben, have you seen either type fail?

Phil


Hi Phill,
I heard back from the fellow who sold me the brackets. He said he had a pile of parts from 3 engines. One was a 1.9 WBX and the other two were 2.1's. That suggest to me the odd bracket is for a 1.9. I have independent information that suggest it is the "older type". I await confirmation that by older, they mean 1.9.
They appear interchangeable to me. Perhaps someone with a 1.9 European import might prefer to have the period correct bracket. My T3's are all modified one way or the other so I am less finicky about years or production as long as they work as well or better than the original.
Cheers,
BenT

On Thu, Jan 28, 2010 at 6:54 PM, BenT Syncro <syncro@gmail.com> wrote:
No, Phill. I checked with my friend with the shop. He has never encountered any AC bracket failures beside the occasional stripped bosses buggered up by careless mechanics.


BenT

Sent from my mobile device

On Jan 28, 2010, at 5:43 PM, plander@optusnet.com.au wrote:


The main thing is Ben, have you seen either type fail?

Phil





--
BenT