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Does the dealer sell those safety stand adapters in the picture?

 

Well... the simple answer is to just call them.
However, the part number is not a valid Infiniti/Nissan part number.
Alternatively, just make one outa a block of wood.

 

I think JC Whitney on-line sells them

 

These are what I've seen used:

http://www.jcwhitney.com/webapp/wcs/...atalogId=10101

 

sweet, this will come in handy later on

 

I tried looking for these, but I couldn't find any. So I decided to build my own. I went to McMaster-Carr website to look up some rubber sticks to put on my jack stands. I decided to go with a 1" x 1" x 12" long piece of polyurethane with a durometer rating of 60 on the Shore A scale. If you don't know what a durometer rating is, it is the hardness of the rubber. There are 3 different scales, OO, A, and D. OO is the softest and D is the hardest. If you do a search for "rubber" on the site, they have a nice little chart that compares the different ratings to each other and common objects. Any way, I got the stick and cut it up into pieces that would fit on my jack stand and went out to try it out. Well despite my degree in Mechanical Engineering I decided not to figure out about how much pressure would be applied to the polyurethane . I found out the hard way that I had picked the wrong material, it was much too soft, but at least I didn't damage anything. So this time I am doing it the right way and crunched the numbers and bought another stick, this time of a rating of 95 on the A scale.

In case anyone is wondering, this is how I figured out which rating to choose: First I got a good estimation on how much area there was on the place to put the jack on the corners. I measured about 1-1/2" long and 1/8" wide. That gives an area of .1875 square inches. I then estimated the weight of the car to be 3500 lbs. I then assumed that there would be 30% of that weight on the rubber. I know if you have 4 corners and 30% on each corner you would get 120%, which is not possible. I did this to give me some extra safety in my calculations. Any way, 30% of the weight on .1875 square inches gives you a pressure of 5600 psi. I then chose a material with a tensile strength greater than that. The original stick I bought had a tensile strength of 4000 psi and the new stick bought has a tensile strength of 6500 psi.

I apologize for the lengthy post and semi-technical content, but I thought some of you might want to know how I arrived at the conclusions that I did. I'll let you all know how it goes sometime next week.