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Are your nuts loose? Axle that is.
Here is the inner race of the rear roller bearing on an early 944 or a 924S. This is what happens if you don't do a 30,000 mile tear down and inspect on your rear axles.
Water gets into the bearings and causes them to corrode. This one siezed up, spun on the stub axle and over heated. Cracked into pieces and this allowed the tension on the outter nut to slacken. That in turn let the hub wobble on the stub axle causing the splines to wear beyond reuse. There are three seals on the rear axles; two lip seals and an o-ring. The o-ring was missing on this example. The outter bearing on the early 944's is a roller while the inner is a ball bearing. 
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Hugh - So Cal 83 944 Driver Person NOT a 'real' Porsche -- Its Better!!!! When was the last time you changed your timing and balance belts and/or cam chain and tensioner? New Users please add your car's year and model to your signature line! Never break more than you fix! Last edited by SoCal Driver; 08-20-2003 at 09:16 PM.. |
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08-20-2003, 01:09 PM
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Where there any audiable signs of this before it snapped? Or even after?
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08-20-2003, 01:22 PM
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High pitched squealing-rubbing noises from the rear in time with the wheel revolving. Rumbling noises too.
CV noise is usually from slow hard turns and has a clickity-clackity sound. E-brake shoe noise is a swish-swish sound. There is also a clackity sound the wheel center caps make when loose. Shure sign of wheel bearing failure is if the nut is loose and/or after rasing the wheel off the ground you can grab it by the sides and shake it back and forth.
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Hugh - So Cal 83 944 Driver Person NOT a 'real' Porsche -- Its Better!!!! When was the last time you changed your timing and balance belts and/or cam chain and tensioner? New Users please add your car's year and model to your signature line! Never break more than you fix! Last edited by SoCal Driver; 08-20-2003 at 02:05 PM.. |
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08-20-2003, 02:02 PM
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Location: Brighton UK since 11/2012
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Not good, but only the 924 uses that type of bearing, the 924S uses aluminum rear trailing arms. That type of bearing rarely fails...
However (you knew there would be one, didn't you) we just changed a bearing in a mega-mile 924s, the bearing race had seized so the hub was being forced round; this ruined the hub. At the moment, 924S rear hub flange (the one with the wheel studs in it) is $499 and has to come from Germany. So let's be careful out there, yes?
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From November 2012; Precision Porsche Specialist Sussex UK, +44 (0)1825-721-205 2001-2012 Gerber Motorsport Inc. 206-352-6911 07.15.06 1996 Ducati 900SP. Suprisingly enough, it's red 08.16.09 1999 Kawasaki ZRX1100. Green. |
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08-20-2003, 10:35 PM
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vott does ziss do?
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hey brit, I know we just discussed this a few weeks ago but my memory not being the best anymore, what bearings/trailing arms does the 951 rear have?
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08-20-2003, 11:14 PM
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Has a single piece double ball bearing. Can be pressed out with the proper jigs. Usually requires heating the aluminum arm to install. Think the part number has PITA in it some where.
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Hugh - So Cal 83 944 Driver Person NOT a 'real' Porsche -- Its Better!!!! When was the last time you changed your timing and balance belts and/or cam chain and tensioner? New Users please add your car's year and model to your signature line! Never break more than you fix! |
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08-21-2003, 09:14 AM
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Yes, Ronin, I noticed that the medicaton had worn off.....
The 951 uses the aluminim trailing arm with single-piece, double race bearing assembly, as SoCal says...it's a pain unless you have the correct tools to remove and install it.
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From November 2012; Precision Porsche Specialist Sussex UK, +44 (0)1825-721-205 2001-2012 Gerber Motorsport Inc. 206-352-6911 07.15.06 1996 Ducati 900SP. Suprisingly enough, it's red 08.16.09 1999 Kawasaki ZRX1100. Green. |
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08-21-2003, 09:40 AM
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vott does ziss do?
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Quote:
 as for the info: thanks, that's pretty much what I remembered.
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08-21-2003, 03:44 PM
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Quote:
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*Disclaimer: The person above is actually dumber than he appears. my web site Torque values maintainance and repairs lots of my rebuild pics weights and measurements '84 944 auto/ps/ac/cc '86 951 Providing ignorance one post at a time. Last edited by todwic; 08-22-2003 at 10:37 PM.. |
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08-21-2003, 11:23 PM
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Quote:
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*Disclaimer: The person above is actually dumber than he appears. my web site Torque values maintainance and repairs lots of my rebuild pics weights and measurements '84 944 auto/ps/ac/cc '86 951 Providing ignorance one post at a time. |
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08-21-2003, 11:24 PM
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still laughin
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*Disclaimer: The person above is actually dumber than he appears. my web site Torque values maintainance and repairs lots of my rebuild pics weights and measurements '84 944 auto/ps/ac/cc '86 951 Providing ignorance one post at a time. |
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08-21-2003, 11:25 PM
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I was going to comment on that myself, you beat me to it... It's as if they knew it was a PITA to remove and install, therefore I they just chose to throw it into the part number. LOL 
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Jack 86 Red 951 - Turbo Twists, otherwise stock for now 83 Black 944 w/86 951 front end - still down and out, but coming back slowly. 02 Altima SE 3.5 - grocery go-getter 00 Yellow Ducati Monster 900i.e. 88 Chrysler Conquest TSi |
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08-22-2003, 07:51 AM
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What would Darth Vader do
Join Date: Feb 2001
Location: Orange, California
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HEY!! That looks like my race....I want credit!!
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1983 944 (2002 to now) 3-924's (Sold) 1967-912 (Traded) NEVER put a used water pump in your car... |
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08-22-2003, 02:26 PM
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Quote:
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*Disclaimer: The person above is actually dumber than he appears. my web site Torque values maintainance and repairs lots of my rebuild pics weights and measurements '84 944 auto/ps/ac/cc '86 951 Providing ignorance one post at a time. |
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08-22-2003, 09:36 PM
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vott does ziss do?
Join Date: May 2003
Location: Seattle
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I might not want to joke too loudly about this, but I'm about to join Gordon in his "ignorance is bliss" approach to car maintenance as I have been searching in vain for the source of a clang-banging noise emanating from the rear of my car that has driven me towards mental collapse.
sometimes it makes me say to myself in fits of neurotic hysteria "wish whatever's making all that racket would finally seize up (or whatever) and rip the rear of the car off already so I'll at least know what the hell it is!!" but then the nurse reminds me to take my medication, walks me back to my room and tells me nice stories of little cars playing in flowery meadows. she's so nice. and tomorrow I get to color the pretty pictures!
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Last edited by ronin; 08-22-2003 at 10:18 PM.. |
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08-22-2003, 09:51 PM
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Didn't want to tell every one Gordon. I was going to wait till we opened up the other side. Maybe we have a matched set...
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Hugh - So Cal 83 944 Driver Person NOT a 'real' Porsche -- Its Better!!!! When was the last time you changed your timing and balance belts and/or cam chain and tensioner? New Users please add your car's year and model to your signature line! Never break more than you fix! |
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08-23-2003, 06:31 AM
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Hehehe. Just do what I did. It should help you to figure it out quicker. Jack up the back, pull the tire. Pull the brake caliper(bracket and all, via the 2 17mm bolts) off of the hub. And have fun yanking and twisting the rotor. If you've got a bearing problem, the rotor and the halfshaft end will be able to move in and out a couple of mm's. I had some slight flex in the rear bearings just by jacking up the car, and grabbing the tire on the top and bottom, and slightly moving it. I had no flex when grabbing the tire on the sides trying the left/right movement. But the brakes were preventing some of the real movement.
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Jack 86 Red 951 - Turbo Twists, otherwise stock for now 83 Black 944 w/86 951 front end - still down and out, but coming back slowly. 02 Altima SE 3.5 - grocery go-getter 00 Yellow Ducati Monster 900i.e. 88 Chrysler Conquest TSi |
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08-23-2003, 08:04 AM
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vott does ziss do?
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Location: Seattle
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good advice! unfotunately I already did that and found nothing. the noise is coming from something that is literally loose back there. it's not a bearing or CV type of clanking. sounds similar to a loose metal plate. next week I'm going to have my friend climb in the back with the hatch open and listen intently to see if he can at least pinpoint the location. I'm sure I'll find it soon enough.
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08-23-2003, 11:04 PM
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loose brake caliper?
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*Disclaimer: The person above is actually dumber than he appears. my web site Torque values maintainance and repairs lots of my rebuild pics weights and measurements '84 944 auto/ps/ac/cc '86 951 Providing ignorance one post at a time. |
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08-23-2003, 11:09 PM
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vott does ziss do?
Join Date: May 2003
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again, good thinking but nope, I already checked. sound is too tinny for that I think. interestingly enough, the noise does stop immediately when you even slightly apply the brakes. so if it was a loose caliper, that would definitely make sense. just have to make sure that next time I get the car up in the air, I'm not going to leave any stone unturned.
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08-23-2003, 11:35 PM
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1983 Porsche 944 2.5 liter
1985.5 Porsche 944 2.5L Supercharged 
911 SC
Panamera
'84 Porsche 944 2.5L
