I have the 997.1TT. I have installed OHLINS. I noticed a clunking noise. Got it checked. Apparently the rear coiler where they bolt on to the rear wheel carrier spider hub has a rubber bush. That bush is cracked, probably due to age. I need to replace them. But i cannot find a replacement part number anywhere. On Pelica/FVD/911UK etc etc. Anyone experienced a similar issue? or any help in find the right part would help. Thanks.

 

Can you ID the part in the picture below:



Ed

 

@lliejk Sorry it is not from this set of parts.. I am attaching images of the part for the left and the right..

 

 

OK, from what I have seen researching this:

1. That's the rear "knuckle" with a large bushing where the shock straddles it
2. Porsche does not sell it separately
3. I have not found an aftermarket provider

I placed a call to a couple of sources, including Elephant Racing and Powerflex. They have almost every other bushing. In fact Elephant's online suspension navigator shows only a hole where that is. A posting I read on the GT2/GT3 forum talked about buying a used knuckle and scavenging the bushing, which seems ridiculous. Powerflex said they do not make one because whatever Porsched uses there can stand up to the stresses faced in that location where their materials would fail.

Elephant is going to check with their bushing expert to see if he knows of any sources. One possibility would be to get the measurements needed and try to find something that fits, or could be modified to fit but not necessarily designed for that spot.

I also went to Lemforder's website and online catalogue and they have nothing available for our cars.

Looks like getting a low mileage wreck may be the only alternative, I am not even sure if Porsche sells those knuckles any longer (I did not check).

Ed

 

Hi Ed, Thank you for the everything.. my research also threw the same results.. Guess i will try to source a similar PU/rubber bushing and fabricate the inner and outer metal round sleeves..

 

Hi Ed,

please see https://rennlist.com/forums/997-gt2-...07-gt3-11.html - - -from post #157 to 163

 

So it sounds like he pushed out the rubber and inner tube and replaced it with his custom made bearing. It also sounds like the original bush flattened out from stress.

Whatever you do pay attention to the comment from Powerflex about them not having anything that would not be torn up in that application. My guess is it may be a non-polyurethane application and using poly there doesn't have the necessary properties to take the stress without tearing. I have no idea what the durometer spec would be in that area, but my guess it is quite stiff.

I am surprised this has not come up before since rubber in that spot will take quite the beating.

Ed

 

I have sent a PM to Tom at @TPC Racing waiting for his response. I agree that a rubber material would be more suitable. More so in our climate in Mumbai, India. PU bushings squeak a lot here..