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When I changed my shocks I inspected my control arms and found the rear lower arms had tears in the center bushings. I could not order the arms and install them myself.... no time ..... so I searched like heck and finally found a pair of TRW units and had them overnighted to me. I took my car the next morning, with its new shocks, to Bavarian Specialties for an alignment and threw these arms on as part of their work.
These arms were hard to find.... Pelican was out of them and didn't know when they would be in... really hard to find.
Control Arm: 997-331-053-03
Porsche original: about $500 each = $1,000 parts
"Same" TRW control arms from Importec: $189 each + 38.95 overnight = $418
Alignment: $196
Labor to install arms: $321
I don't know if the tears in the bushings are all that bad, but they were definitely torn. Note that the bushing is designed to be attached on only two sides and there is an empty slot on the corresponding two sides so it is not torn clean away as it may look. My screwdriver is inserted into one of the designed slots (not a tear). It is torn where it is attached.
You can just replace the center bushings for anyone thinking of doing this. If the ball joint is fine and the rubber boot is in tact then no need to replace (if it wasn't damaged or bent).
Those bushings are also not oriented correctly which is probably why they failed.
They should be oriented with the thrust/trailing arm and not the LCA.
I'm going to order bushings rather than arms all the way around if I can help it. Check play/wear in ball joints by looking for movement while still fastened? My car has 107k mi. I see small cracking of the bushing on the rear driver's side. I'll look again when I have a minute to get dirty. With a press this should be simple.
When I had my PPI done the tech said my front passenger "lower control arm was leaking" and that the OEM part was "fluid-filled" (and he was not referring to the ball joint). Based on the photos above, the "lower control arm" appears to have a solid-ish rubber bushing in its center.
Per the 997.2 service manual, is he referring to the Diagonal Arm (aka, Control Arm Link) vs. the Lower Control Arm/ Trailing Arm (aka Wishbone), as seen above?
I'm finding there is a decidedly random use of vocabulary to describe parts between the Porsche documentation and parts house description.
Apparently, a Lower Control Arm/ Trailing Arm (Porsche service manual), Wishbone (Porsche parts catalogue), Track Bar/ Track Rod (parts houses) are all the same part.
And, a Diagonal Arm (Porsche service manual), Guide (Porsche parts catalogue), Control Arm/ Control Arm Link/ Trailing Arm (parts houses) are all the same part.
But I digress, as far as you know are anyone of these parts "fluid filled"?
When I had my PPI done the tech said my front passenger "lower control arm was leaking" and that the OEM part was "fluid-filled" (and he was not referring to the ball joint). Based on the photos above, the "lower control arm" appears to have a solid-ish rubber bushing in its center.
Per the 997.2 service manual, is he referring to the Diagonal Arm (aka, Control Arm Link) vs. the Lower Control Arm/ Trailing Arm (aka Wishbone), as seen above?
I'm finding there is a decidedly random use of vocabulary to describe parts between the Porsche documentation and parts house description.
Apparently, a Lower Control Arm/ Trailing Arm (Porsche service manual), Wishbone (Porsche parts catalogue), Track Bar/ Track Rod (parts houses) are all the same part.
And, a Diagonal Arm (Porsche service manual), Guide (Porsche parts catalogue), Control Arm/ Control Arm Link/ Trailing Arm (parts houses) are all the same part.
But I digress, as far as you know are anyone of these parts "fluid filled"?
The ball joints have grease inside them that can leak out, but none of them are "fluid filled."
The ball joints have grease inside them that can leak out, but none of them are "fluid filled."
hmmm, it definitely wasn't the ball joint (I'm familiar with those), and I thought I did see indications of weeping, or he implanted that in my head. The construction of the bushing on the Diagonal Arm looked like it could potentially contain fluid. i.e. it seems to balloon out on the sides more than other bushings, similar to that of a ball joint. I'll crawl under there again and get some pics this time. Thanks!
hmmm, it definitely wasn't the ball joint (I'm familiar with those), and I thought I did see indications of weeping, or he implanted that in my head. The construction of the bushing on the Diagonal Arm looked like it could potentially contain fluid. i.e. it seems to balloon out on the sides more than other bushings, similar to that of a ball joint. I'll crawl under there again and get some pics this time. Thanks!
I replaced all of these suspension arms recently, front and rear. None of them have fluid, but they do contain grease. Could be fluid leaking from above. The power steering rack tie rods are in that area. My rack leaked into the inner tie rod boots. Brake lines are also in the area. Could also be leaking grease from torn CV joints if you have an AWD 911
This thread does make me wonder if stock bushings are available for the 997.2 suspension without having to buy complete control arms and related parts. Anybody know?
This thread does make me wonder if stock bushings are available for the 997.2 suspension without having to buy complete control arms and related parts. Anybody know?
My friends with 928s use Vertex. I believe they rebuild arms and other parts.... or something like that... worth a call. I never used them but some friends give them good marks. (866) 668-0660
I appreciate the link, but their rebuilds don't seem much cheaper than new aftermarket control arms. I have an oven, a freezer and a hydraulic press. Reacing bushings is usually something I can do in my shop. I just want some stock rubber ones to tighten things up while I'm replacing my shocks.
I don't really want to go with monoball or bearings. I don't want any more NVH than stock. I'm getting old.
The 997's are fitted with "Hydraulic" front arm bushes, which are thicker than the 996 and 997.1 gt3 bushes/arms. What this means I'm really not sure....
The caster arm has a wider spacing to go over these types of bushes.
I appreciate the link, but their rebuilds don't seem much cheaper than new aftermarket control arms. I have an oven, a freezer and a hydraulic press. Reacing bushings is usually something I can do in my shop. I just want some stock rubber ones to tighten things up while I'm replacing my shocks.
I don't really want to go with monoball or bearings. I don't want any more NVH than stock. I'm getting old.
I think they are cheaper when you send them the old part, the core. Again not an endorsement.
12-05-2015, 09:25 PM
997.2 Control Arm Replacement
