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Damage to car from jacking w/jack pads??!@%&$##
I just bought a new floor jack, and tried it out with a new jackpad. I just lifted one side, and then put the car down. I did go up about 15" or so. At any rate, when I got the car down, I noticed that the rocker panel is bent up right at the jack hole location. My stomach dropped at first, as I thought I literally bent the car!
I started looking closer, and it would appear that the rocker is bent up about 3/8-1/2" at the bottom side, but there doesn't appear to be any sort of mark from hitting something to do that kind of damage. If I look at the top of the rocker and along the sill, the gap is perfect along the bottom edge of the door. PLEASE tell me that the rocker had to have had that damage before, and that I noticed it while jacking is just a coincedence! Also PLEASE confirm by belief that if I actually DID bend the car, I'd see it at the sill where it lines up with the door. I hate is when this kind of stuff happens!!
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Ed Hughes 2015 981 Cayman GTS 6 speed,Racing Yellow Past:1984 911 Targa (Ruby), 1995 993C2 (Sapphire), 1991 928S4 |
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one of gods prototypes
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if you used the pad that slids into the factory jack point the damage was probably already there, if you used a jack pad that simply sits on your jack and you lifted the car from underneath the rocker you probably did the damage.
porsches have very few jacking points to jack the car up.
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No, I used the jack pad that goes INTO the factory jack point hole.
I've read all of the warnings about jacking from UNDER the car. The only thing I think I could have screwed up on is going to high on the one side? But, actually, I'd think that the higher I went, the more load actually transfers to the other side which is still on the ground.
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Ed Hughes 2015 981 Cayman GTS 6 speed,Racing Yellow Past:1984 911 Targa (Ruby), 1995 993C2 (Sapphire), 1991 928S4 |
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Information Junky
Join Date: Mar 2001
Location: an island, upper left coast, USA
Posts: 73,167
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The only time I've heard of jack pad (that goes INTO the factory jack point hole) causing (showing) problems was on pre-galvanized bodies that had rusted from the inside out.
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Everyone you meet knows something you don't. - - - and a whole bunch of crap that is wrong. Disclaimer: the above was 2¢ worth. More information is available as my professional opinion, which is provided for an exorbitant fee. ![]() |
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Join Date: Jul 2000
Location: So. Calif.
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Not sure what happened, but the jack receiver sounds like it might have bent. You might want to have a body shop take a look for another opinion.
This is my procedure for jacking. I use a small hydraulic jack to lift the jack pad only high enough to slide a floor jack under the trans. mount (or for other believers, the engine). This allows both sides to go up evenly. Sherwood Lee http://members.rennlist.org/911pcars |
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I have been using a floor jack and jack pad on air-cooled VWs and Porsches for more than 35 years ... never any structural damage visible! Though we don't actually see that much structural rust damage in this [dry] part of the country!
Saw a '73 Duster with a broken front torsion bar from corrosion, once, back in the '80s, but it was from St. Louis MO! The IS guy said it was OK when he parked it that morning ... had an odd list to one side when he went out after 5:00 PM to go home, though!
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Warren Hall, Jr. 1973 911S Targa ... 'Annie' 1968 340S Barracuda ... 'Rolling Thunder' |
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Join Date: Jan 2001
Location: Left Coast, Canada
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The floor jack cup can slide off the small disc of the jack pad, and contact the rocker panel. This happens as the floor jack tries to move on it's rollers, and it adjusts itself to the angle of the jacked car. This is one thing you have to watch out for when using a jack pad.
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I got two 1/2 inch cracks in the paint on the rocker (at the jack hole) by lifting there. Oh well!
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Ditto on the jack not being in far enough. I did this at a track event when I was in a hurry and learned the hard way. Good thing it is an easy fix. Just remove the panel from the car and any body man should be able to pound/fill this and shoot it with some of the chip guard to blend. I did both sides since they were both chipped up.
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No, The jack pad was in all of the way. I went out and looked again, and it definitely has to be that the rocker panel was bent before. There is no way that the jack point could have bent the rocker. I'm (pretty) satisfied that it had to be that way before I jacked the car up.
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Ed Hughes 2015 981 Cayman GTS 6 speed,Racing Yellow Past:1984 911 Targa (Ruby), 1995 993C2 (Sapphire), 1991 928S4 |
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Quote:
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Join Date: Feb 2000
Location: Lacey, WA. USA
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there is a question you asked that I'm not sure anyone answered and I don't want you to be worried about it. You did not "bend the car." Not by jacking. The only damage would be 'local' damage to the sheet metal or jacking bracket.
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Man of Carbon Fiber (stronger than steel) Mocha 1978 911SC. "Coco" Last edited by Superman; 09-01-2002 at 07:53 AM.. |
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Join Date: Jun 2001
Location: Montreal, Quebec, Canada
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I had the same problem on my 72. My problem was caused by rust. There isn't a lot of structural meta around the jack receiver plate. In my case the rust had ruined the receiver plate and tube is only then supported by a large weld at the end. The result is that the outer rocker panel bears the brunt of the weight and then bends as a result. I'm in the process of replacing both outer and inner rockers, as well as, the jack receiver plate and tube. This is are real PITA due to the large number of spot welds and th amount of overlapping sheet metal in the area.
I didn't have any other damage caused by the jacking. The replacement parts are available at $100 a side and includes both rockers and jack receiver plate/tub. Our gracious host offers these products for sale. Rick
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Rick Katigbak Gretchen - 1972 3.6 ST-Replica No Name - 1966 911 - 2.7S powered |
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