11-01-2006, 03:03 PM
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#1
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Registered User
Join Date: May 2006
Location: Kingwood, TX
Posts: 453
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Quote:
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Originally Posted by JackG
I noticed that this thread was referenced from the other jacking thread, and I then saw the picture above. That is NOT the rear jack point that the Bentley manual suggests to use. 
The point in this picture is the flimsy support bar that is just in front of the muffler. It's only about 1 inch square tubing, and doesn't appear to be very substantial.
The Bentley manual suggests using the rear axle support, which is directly between the rear wheels. It also has two bolt heads a couple of inches apart that attach the rear sheet metal brace, similar to where this picture is taken. But it is on the axle support, which is FAR more substantial and is tied directly into the car's "frame". 
edit: after following the "rainy day" link in that post, the picture is supposed to be from a Bentley event. However, that's not what the manual shows (to the best of my memory), and it's defintely not how I did it. I'm traveling right now, or I'd have a look at the manual again. I remember it showing the axle support to be the jack point, where the metal cable loop runs through. You can see that in a picture further down the page. Someone have a Bentley manual and want to take a look? Otherwise, I'll be home Friday night. |
I think this is the picture you are talking about.
Bentley Pg:03-4
http://986forum.com/forums/attachment.php?attachmentid=4420&stc=1
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11-01-2006, 05:36 PM
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#2
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Registered User
Join Date: Mar 2005
Location: South Carolina
Posts: 530
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Quote:
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Originally Posted by Travis
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Very nice... thank you. You can see that the two pictures are of totally different chassis locations, and this one (not the rainy day event pic) would be the more robust and best place to lift the car. The "rainy day" website is just plain wrong... maybe even dangerous.
__________________
Jack
2000 Boxster S - gone -
2006 Audi A6 Quattro 3.2
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11-01-2006, 06:21 PM
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#3
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Registered User
Join Date: Sep 2005
Location: Minneapolis/St. Paul, Minnesota, USA
Posts: 3,308
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Quote:
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Originally Posted by JackG
Very nice... thank you. You can see that the two pictures are of totally different chassis locations, and this one (not the rainy day event pic) would be the more robust and best place to lift the car. The "rainy day" website is just plain wrong... maybe even dangerous.
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Hi,
Yep, that's the place. It's also a good idea to place an 8" or 12" piece of 2X4 between the Jack Saddle and the cross brace to better distribute the load, especially if you're gonna keep it on the Jack for any appreciable time...
Happy Motoring!... Jim'99
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11-01-2006, 08:24 PM
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#4
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Registered User
Join Date: Apr 2005
Location: United States
Posts: 367
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Good catch, JackG. To all, I'm sorry I perpetuated bad information and thankful for the knowledgable and observant participants on this forum.
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11-02-2006, 12:02 AM
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#5
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Registered User
Join Date: Sep 2005
Location: Minneapolis/St. Paul, Minnesota, USA
Posts: 3,308
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Quote:
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Originally Posted by 98Boxster98
Good catch, JackG...
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Hi,
Actually, I'm not so sure. I believe it's the same picture, only from a different angle. There is only one 'U' shaped (sort of) cross member under the car, and it is clearly shown in both pics. I raise my car similarly to the pic shown from the Rainy Day website, but this is the same area described in the 2nd pic...
Happy Motoring!... Jim'99
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11-02-2006, 07:04 AM
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#6
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Registered User
Join Date: Mar 2005
Location: South Carolina
Posts: 530
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Quote:
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Originally Posted by MNBoxster
Hi,
Actually, I'm not so sure. I believe it's the same picture, only from a different angle. There is only one 'U' shaped (sort of) cross member under the car, and it is clearly shown in both pics. I raise my car similarly to the pic shown from the Rainy Day website, but this is the same area described in the 2nd pic...
Happy Motoring!... Jim'99
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Sorry, but that's wrong, Jim. There are two U shaped members under the car... the rear axle support with the steel cable loop, which is the correct jack point, and the little cross member just in front of the muffler, which is the one shown in the rainy day photo. Heck, the rainy day photo even describes it as the one just in front of the muffler, which is wrong.
I suspect you didn't get under your Boxster and look around, or it would be clear and obvious that there are two places that could be mistaken for each other. Think of them as the front and rear attachment points for the sheet metal brace (the flat pan) that covers the rear section of the car. The rear attachment point is just in front of the muffler to a small cross member. The front attachment point is at the axle support where the cable loop is. Each has two bolts. The front point, between the wheels, on the front end of the sheet metal brace, far away from the muffler, is the correct jack point.
__________________
Jack
2000 Boxster S - gone -
2006 Audi A6 Quattro 3.2
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11-02-2006, 09:21 AM
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#7
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Registered User
Join Date: Sep 2005
Location: Minneapolis/St. Paul, Minnesota, USA
Posts: 3,308
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Quote:
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Originally Posted by JackG
Sorry, but that's wrong, Jim. There are two U shaped members under the car... the rear axle support with the steel cable loop, which is the correct jack point, and the little cross member just in front of the muffler, which is the one shown in the rainy day photo. Heck, the rainy day photo even describes it as the one just in front of the muffler, which is wrong.
I suspect you didn't get under your Boxster and look around, or it would be clear and obvious that there are two places that could be mistaken for each other. <- WTF is this?? I was just under it last week changing Oil and Plugs for winter storage, FWI. Think of them as the front and rear attachment points for the sheet metal brace (the flat pan) that covers the rear section of the car. The rear attachment point is just in front of the muffler to a small cross member. The front attachment point is at the axle support where the cable loop is. Each has two bolts. The front point, between the wheels, on the front end of the sheet metal brace, far away from the muffler, is the correct jack point.
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Hi,
Jack, I just came in from crawling under my car and you are right, I was wrong. These are indeed 2 different areas, though they looked the same to me. I have always used the Box Beam 'U' shaped crossmember whern raising the car to set my stands at the jack plates as described in the Bentley Manual.
After a thorough inspection, if you're only raising the car to place the stands under it, I suspect that this incorrect jack point will also work. This piece is a fairly substantial 'U' shaped I Beam and I believe it would carry the weight. Clearly this is what the Rainy Day pic shows.
My choice would still be to use the crossmember which is forward to the one in the Rainy Day pic, because I think the crossmember is better situated under most of the rear weight. But, I think the other would work as well.
One final thing, I would never use either of these lift points for anything other than raising the car to place proper stands in the proper locations...
Happy Motoring... Jim'99
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11-02-2006, 09:34 AM
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#8
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Guest
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Quote:
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Originally Posted by Travis
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What is this steel cable for? Thanks.
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11-02-2006, 10:13 AM
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#9
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Registered User
Join Date: Sep 2005
Location: Minneapolis/St. Paul, Minnesota, USA
Posts: 3,308
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Quote:
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Originally Posted by bmussatti
What is this steel cable for? Thanks.
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Hi,
Porsche calls it a Retaining Cable, while Bentley calls it a Passenger Safety Cable.
In either case, it is looped through a receiver, which is bolted to the Engine Block at one end, and bolted to the Rear Axle Support ('U' shaped crossmember) on the other end. From the looks of it, it would keep the Engine from falling and scraping the ground should the Engine or Transmission Mounts fail. If that were to occur, I doubt this would be your biggest problem, especially if at high speed...
Happy Motoring!... Jim'99
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