Pazzo009

Hi guys, is anyone aware of this? I brought the car in for service and explained that one CL comes apart when removed. They looked into it and found it to be faulty. Then my service advisor tells me that looking into this deeper, that Porsche has a bulletin that GT3's that are used for track should change all CL's every 6000 miles. Then he told me there is a story of someone not doing so and getting killed.

I change my own wheels, know the procedure, and follow it correctly. The amount of track use is minimal. I have 6700 miles on my 991 GT3 and I have a total track time of maybe 4 hours. What are your thoughts? I follow this forum pretty well and I don't recall seeing anything this imperative.

Quadcammer

maybe 6k track miles.

Under your circumstances, I wouldn't change anything.

Can always count on the dealer for a nice big $$$$ recommendation.

Sean in Texas

I thought the manual said 6k miles of track time...not overall 6k miles. Street miles put hardly any stress at all on the system.

zedcat

Yes, this is in the supplement booklet "Driving on the Race Circuit" At 6000 TRACK miles change all central bolts AND also change the rear wheel hubs and wheel bearings. At 12000 TRACK miles also change the front wheel hubs and wheel bearings. Not new. The 997.2 GT3 had similar requirements although the guidelines came out later. After some problems as best I can recall.

Edit- found the booklet. Direct quote: "Every 6,000 mls (10,000 km) of race circuit driving"

rm21

Yes, track miles only. Just make sure you keep a good log.

Pazzo009

Thank you guys, so very helpful. I always say how priceless the forums are. Being a business man I am always skeptical of others when it comes to them making money and me losing it...albeit I respect it and understand, I digress.

I will definitely bring this info to their attention. I don't have my manual handy because it is with the car, but what I find more troubling is that either they're not paying attention to this very important specific factor, or they're trying to get over on me. They want to charge me $370 for the CL and $94 in labor, which is ridiculous because it takes literally 5 mins to grease it and torque it.

To add to this whole situation they pull the car in and do a preliminary alignment check without it on the rack. It's a system with these things on stands that I would guess be lights or lasers. They tell me my alignment is significantly off and toe is out of line too. They were going to put it on the rack to be sure. What baffles me is that I haven't hit any significant bumps, no accidents, car bought new from them, minimal track time, and car drove absolutely perfect in every sort of way....$449 for an alignment.

ddlaud

This requirement is in place for the other center lock cars as well such as 997 Turbos, GTS', etc. Agree not new, no need for concern.

LexVan

$215 x 4 = $860/6,000 miles = about 14 cents/track mile. Not too bad.

Targa Tim

CL track use was extensively discussed in 997GT3 and RS forum.

I do not have any trust in CL for track use at all. Most likely the majority of CL will continue to run fine despite 6000+mls of track use, but nobody can guarantee that if you change every 6000 mls and then no problem will happen. My life is worth much more than these arbitrary numbers that someone make up.

I changed mine to 5 lugs and never look back.

Pazzo009

You have a valid point. Still don't know what the benefit is to having them. Doesn't save me any time to change out a set

zedcat

Also need to add hubs and bearings in the rear. Not sure of cost for 991 but for 997.2 GT3 it's another 950 in parts. But for those that track a lot, not that much compared to tires and brakes one would use in 6000 track miles.

tqevo

To be fair I would guess that most cars come from the factory out of spec on the alignment.

MileHigh911

Not a huge supporter of CL, but I have them. The 5 lug guys are not in the clear either for a heavily tracked car. While the 5 lug attachment does appear to be easier to accomplish, the stresses of track time are still there on the components. The next weakest link in the system would be the hub/bearings. Ask anyone who has a lot of track time, these are disposable items that need replacement. And, above all, if race slicks are used, one better be ready to replace any suspension component much sooner than typical. The higher G forces created pass those forces along. One needs to pay to play.

GregJGT3

This last weekend at Rennspot V Andeas Peruninger said that a 991 GT3 wheel alignment should be performed after the first 750-1000 miles especially if the car is tracked.

montoya

You are forgetting the rear hubs at 6000 too, then front hubs at 12000 track IIRC.

When I did the maintenance as a precaution on my .2 GT3 the total for the first 6000 was more like around $3000 including labor, done by my Porsche dealer.