Pagoda SL Group
W113 Pagoda SL Group => Drive train, fuel, suspension, steering & brakes => Topic started by: twistedtree on December 26, 2012, 16:40:25
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I've read all the posts (I think) on locations to place jack stands to support the rear of an SL, but all the recommended locations are on one part of the rear suspension or another. These locations don't work if the task at hand is to remove some or all of the rear suspension. I'm about to embark on replacement of the trailing arm bushings and the spring pads, but am unsure where on the car's body I can safely support it. In my case, I'm looking for a location for the lift arms on a car lift, but the same would apply if you were looking for a place to locate jack stands. Normally I lift from the forward mount point of the trailing arms, but obviously that won't work when the goal is to remove the trailing arms. There must be some part of the body strong enough to lift from, but I don't want to trash the floor pans in my attempts.
Any guidance?
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I did place the jack stands under the jacking points when I swapped the rear end. I did put some wood pieces between the jack stands and the car so as not to damage the body, though this is not recommended for safety reasons as it can make the whole set up a bit unstable if the car was to move. In my case I did make sure the front wheels were blocked by wheel shocks and I chose the wood pieces carefully so that they were strong and wide enough to minimize risks. I left the car jack as a security on one side as well as another jack on the other side. I also put the wheels under the car. Make sure the car is very stable before going under there and that you will have enough space in case it collapses. And don't trust your jack stands 100%: I had a w108 4.5 fall while I was under there because the jack stands bent/collapsed. Fortunately enough creeking noises drew my attention and I got out of under there like a cannon ball just in time. The back of a Pagoda is quite light, but heavy enough to cause quite some harm if it collapses on you.
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There is a strong structural frame channel which runs across the car in front of the rear trailing arms. You can block up on each side then bridge from side to side with a good lumber 4x4. You can use additional blocks to concentrate the weight where you want it between the frame member and the 4x4. You can safely do any procedure with the rear diff this way. You can use car ramps, blocks, rims or whatever for supports on each side.
When you are working under the car, always store any removed tires and rims under the car for your added safety!
If your car is in perfect structural condition (no rust), custom lift supports can be made which slip into each rear jack support.
If your working on a non-platform style car lift, you can block up to the same rear cross-member, however extreme caution must be taken when removing heavy components while a car is on a lift. Sudden changes in weight distribution can cause the car to shift or worse. Special long jack stands are used to prevent a car on a lift from shifting while major components are removed or installed.
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just lending my advice when I changed out rear end on mine I had that same issue with jack points in back... it got a little spooky the rear axle weights alot and when was up in air car started to get a little front heavy. MY wife held onto rear bumpers ... maybe would have been ok, but when I dropped rear axle I really felt it start to tilt forward... maybe just in my head, maybe picked bad points in rear.
Bob
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When I first changed my axle I placed the stands under the jacking points as mentioned by Joe but when I did my full rebuild I purchased a tilting lift from CJ Autos which works on the sills and made life much easier. http://www.cjautos.eu/product_p/cl01.htm#sf
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Very slick set up!
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I used the lift to raise the car to remove the axle. The lift pads were on the frame next to the jack points. Once I had the axle out, I machined a couple of adapters and used the arm posts to support the rear of the car with jack stands. It is very stable and allows me to use the lift to raise the car to work on the underside.
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Looking good Wallace !
Bob