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Front anti roll bar brackets (d shaped brackets)

S

Sandspider

New member
Hi all

MOT day today, and the news isn't great. Apparently, both of my front anti roll bar brackets (d shaped brackets) have snapped. This is the pair of brackets that hold the front anti roll bar to the sub frame at the centre of the car.

Does anyone know if these are available (new) from suppliers other than Porsche? And what I might be looking at for a pair price wise (from Porsche or from alternate suppliers)? If anyone knows a part number for them on a 1986 Lux that would also help!

Many thanks.
 
Hi,

Slightly confused, as the front ARB is secured in hangers - there aren't D-shaped brackets. However, the parts shouldn't be too expensive, I'd advise calling your local OPC once you have established which bits are broken. I'd guess its the hanger brackets (944 343 733 00) and / or the clips (944 343 731 00). Note that the part numbers changed between the 86 and 87 model years - the ones I quoted are '86 - so best tell the OPC your VIN no. They are pretty easy to get at so a fairly straightforward job.
 
Thank you, Steve.

I'm going by what the garage told me - apparently the brackets (or hangers) are shaped like lower case letter 'd's! I'm in touch with my OPC already. Will look up the part numbers you mention and see if I can figure out which bits are actually broken.
 
With those part numbers I figured out it's the clips that have broken - they make up the lower half of the "d shaped" bracket. Thanks again, Steve.

Do you happen to know if the actual clips changes between years, or just the part number? Slight inconvenience of having a 1986 car - it doesn't fit comfortably into the pre '86 nor post '86 bracket!
 
Hi Giles

If we are talking about the clips that fit around the ARB it may be worth measuring the ARB's diameter before ordering replacements. My reasoning is that many owners fit upgraded ARB's for better handling as they are easy to change but do require the correct size clips. I upgraded my early turbo ARB's to the later larger size a few years ago and had to get the correct size clips to fit the larger diameter. Due to how popular an upgrade this is it's possible that you may already have the next size up ARB from an early Turbo.... worth looking at to be sure.

Cheers

Pete
 
Thanks Pete.

As far as I know they're standard, but as you say, not easy to tell on a 28 year old car! I'll check... Don't suppose you happen to know the diameter of the original ARB / early turbo / late turbo version so I can tell what I've got?

Thank you.
 
Hi Giles

As it happens i have both early and late turbo ARB's here to measure... my old early ARB's come out at 24.2 mm and the larger later ARB's that are waiting to go back on the car are 27.2 mm so if you have ARB's smaller than these it's safe to say that they are the standard N/A size, iirc they are around 19 mm but wouldn't swear to it, it's just a number that I have in my head for some reason...:)

Cheers

Pete
 
The bottom clamps are the same for all years.
It's the bushings that vary in function of bar size.
 
Thank you Pete, those are some useful numbers! And thank you TTM, sounds like I need to give the garage another ring and check whether the bushings are finished off too - probably yes if the rings are broken I assume...

Never simple, is it!
 

ORIGINAL: TTM

The bottom clamps are the same for all years.
It's the bushings that vary in function of bar size.
Click to expand...


Sorry I have to disagree with that.... I thought this when buying the later ARB's for my car, my earlier smaller clips wouldn't fit around the larger diameter ARB, a call to the supplier ( may have been porchapart although can't remember now) confirmed that I needed the larger clips which they sent, problem solved. I've just checked both ARB's... bush depth on both is just over 10 mm from which I take it that both bushes have the same thickness whereas measuring the clip diameter shows more than a 2 mm difference which would make sense considering the two ARB diameters?

Pete
 
Not to confuse things further, but the PET diagram I'm looking at (1991 version) shows 3 different size options for the bushings! All 3 have turbo part numbers though, so perhaps it's different for turbos?
 
Right, I've heard back from the garage - my ARB measures 24mm apparently, so sounds like it's an early turbo ARB. Thanks for that suggestion, and the measurements Pete -never occurred to me that it might have been upgraded. I've asked my OPC for the correct clips for an early Turbo.

However, it still doesn't clarify which bushes I need (might as well replace them too). I've gone back to an earlier version of PET (1988, closer to my car's age) and the bush part number is 477 411 053. There are a number of different letter codes and sizes that accompany this PET number though (see picture). Can anyone tell me which bushes go with the early turbo ARB? I don't have M030 suspension. I assume the early turbo would be the 86- turbo, so the part number for the bushes would be 477 411 053 K, with the 24mm bush? But then I've also heard the bushes are all the same size, so I'm confused!

Thanks for all the help.





BA9C13B2B9BF42EC81E3BEADABCCE51C.jpg
 
looking at the PET list I would go for part number 477.411.053.k assuming as you say that the ARB's fitted to your car are 24 mm. Strange though that it's not a 951 number?.. perhaps a quick call to an OPC would make things clearer remembering to ask for an early turbo bush rather than giving your car details.

Pete
 
Cheers Pete. The more recent PET diag lists them with 951 part numbers (951 343 794 variants 07 / 02 / 04), but then the bush sizes are 21.5mm, 25.5mm or 26.8mm! And there's no indication as to what the different options are for. I think you're right, I'll ask Exeter OPC.
 
Numbers prefixed with 477 are 924 part numbers, so there must be some versions of 924 that used this 24mm bushing before.
 
Yep, I got the garage to do that for me (I'm at work). That's where the 24mm figure came from, which matches up with an early Turbo ARB.

OPC Exeter have now sorted me the correct clips and bushes, apparently. [:D]

Whoops - responded to a post now edited!
 
Coming to this one a bit late, but it sounds like you are on the right track.

When the bushes break the force exerted on them by the ARM causes them to slightly unroll, making them d-shaped. I had this on my S2 (although didn't have any problems identifying the replacement part.)

When those parts on my S2 went, the other attachment on your diagram (951 343 075 00 - item 6) went soon after. You may like to think about replacing them at the same time.


Oli.
 
Thanks Oli

I think the d shaped reference relates to the L shaped bar and the circular clip combined - which looks a bit like a lower case d.

I'll have a peer at the other bushes when I get the car home. This will be my third or fourth OPC order in the past month or so!
 
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