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billjam's Avatar
 
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Just dodged a bullet

Just washed the car and took it for a quick lap of the block to dry it off a bit. Turned into my street a 100 metres from home and lost drive as I changed down to second. Managed to coast home and into the carport. Tried all gears and they all engaged and seemed to work OK, even the speedo worked .

Had a look underneath and found this ...





Thanking my lucky stars that it didn't let go 30 seconds earlier when I was doing 80kph.

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Bill
1988 Carrera - 3.6 engine (with ITBs, COPs, MS3X) and a whole set of turbo body panels waiting in the attic.
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Old 03-29-2020, 05:48 AM
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Is it common for axle to detach like that?
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Old 03-29-2020, 05:59 AM
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Yikes. Was there recent work done to CVs? Glad it worked out as best it could.
Old 03-29-2020, 06:11 AM
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Hey, nice marmot.
 
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Yowza! That would’ve required an underwear change for sure.

If you have the original with the longer bolts, get a set of Stage 8 locking fasteners. If they are the newer with the shorter bolts then get some Schnorr washers.
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'83 911 SC 3.0 coupe (NA)

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Old 03-29-2020, 06:11 AM
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Happened to me once - car had just come back from shop; apparently, as they explained it, they packed too much grease and the bolts spun out. I was about 5 miles from the shop, and they sent a flatbed and corrected.

Jason
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Old 03-29-2020, 06:13 AM
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Hey, nice marmot.
 
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Quote:
Originally Posted by sugarwood View Post
Is it common for axle to detach like that?
Can happen after replacing/reinstalling, yes. I think you’re supposed to re-check torque after 100 miles.

Locking fasteners like Stage 8 prevent backing out. Some people have used safety wire. Schnorr washers is another approach.
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'83 911 SC 3.0 coupe (NA)

You can't buy happiness, but you can buy car parts which is kind of the same thing.
Old 03-29-2020, 06:14 AM
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Yes, it has just had a total suspension and brake rebuild.
Checking the axle and caliper bolts was on my list of things to do this weekend but I decided to do it during next week as I will likely be shutting down the workshop in a day or two, so I'll have plenty of spare time then.
So lucky it came off at walking speed.
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Bill
1988 Carrera - 3.6 engine (with ITBs, COPs, MS3X) and a whole set of turbo body panels waiting in the attic.
Day job ... www.sspowdercoat.com.au
Memories: '68 912, '72 911T, '80 911SC, '84 911, '85 930, '86 930, '87 911
Old 03-29-2020, 06:27 AM
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What is that pipe for coming downward hooking into the exhaust with the spring clamps?
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Old 03-29-2020, 07:18 AM
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BTDT - was the reason for my only tow in 18 years of ownership. (There was a second flatbed event, but that was by invitation of an outraged NYS Trooper.)
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Old 03-29-2020, 07:44 AM
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Quote:
Originally Posted by rattlsnak View Post
What is that pipe for coming downward hooking into the exhaust with the spring clamps?

Heat I would say
Old 03-29-2020, 08:01 AM
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Quote:
Originally Posted by sugarwood View Post
Is it common for axle to detach like that?
Common is a relative term. It can be questioned why Porsche went to VW Beetle sized CVs on the SCs....
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Old 03-29-2020, 10:13 AM
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For a long time nobody made a locking fastener for the shorter studs you have to use with replacement CVs. I haven’t checked into lately. Is the clamping force different with the shorter studs? It doesn’t make much sense to me why there aren’t locking fasteners for the short ones. Not needed or just that nobody has addressed the market?
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'83 911 SC 3.0 coupe (NA)

You can't buy happiness, but you can buy car parts which is kind of the same thing.
Old 03-29-2020, 10:32 AM
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You definitely dodged a bullet!

I need to stay off the internet lol. Seeing this kind of stuff gives me anxiety.

I just replaced boots on both axles myself, torqued everything and then drove it to work a few times (50-100 miles total I would say), then drove it to the mechanic and had him double check the torque on the transmission and hub side. I used new bolts, reused moon washers, cleaned transmission flange side with brake cleaner and avoided getting grease on the bolts. hopefully they stay tight!

Paranoid me wants to check it again...my mechanic is going to kill me.
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Old 03-29-2020, 12:05 PM
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Read this tome from beginning to end.
Reconstructing Constant Velocity (CV) Joints

(a more recent thread CV Bolts!)
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I don't need that.

Last edited by pmax; 03-29-2020 at 01:26 PM..
Old 03-29-2020, 01:22 PM
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Quote:
Originally Posted by Trackrash View Post
Common is a relative term. It can be questioned why Porsche went to VW Beetle sized CVs on the SCs....
As Gordon mention..It is not common at all.................
Ivan
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Old 03-29-2020, 01:39 PM
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I lost it once. The car just coasts, nothing dramatic. The worst that will happen is you mess up an accelerator linkage.
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Old 03-29-2020, 01:52 PM
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Happened to me on my Targa a few weeks after I purchased it 14 years ago.

Snapped the bolts on the outer CV joint.

Luckily I was just accelerating from a stoplight and heard a loud bank.

$16 for new bolts and some blue lock-tite and used red paint to index the bolts and all is well now.

Would not want to experience it at highway speeds.
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Old 03-29-2020, 03:41 PM
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....
$16 for new bolts and some blue lock-tite and used red paint to index the bolts and all is well now....
When I get to that part of the car, I'll clean out the couch cushions to find the $ for new bolts
Old 03-29-2020, 04:23 PM
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Quote:
Originally Posted by rattlsnak View Post
What is that pipe for coming downward hooking into the exhaust with the spring clamps?
As Hellraiser suggested, it is heat. Or more accurately ... "warm".

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Bill
1988 Carrera - 3.6 engine (with ITBs, COPs, MS3X) and a whole set of turbo body panels waiting in the attic.
Day job ... www.sspowdercoat.com.au
Memories: '68 912, '72 911T, '80 911SC, '84 911, '85 930, '86 930, '87 911
Old 03-30-2020, 12:26 AM
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i had it happen after wheel bearing replacement, and the mech. put everything back quite greasy.

I caught it just in time, smelling the burnt CV grease through the heater. 6 bolts loose.

reassembled it clean, put color markings on the bolts, and checked a couple of times afterwards to see if the bolts had rotated. All good.

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Old 03-30-2020, 01:56 AM
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