Question about replacement of jack receiver tube and pyramid Options

[Richard Casto]

The PO had removed the old jack receiver tube and pyramid due to rust. I am going to replace these (not interested in leaving them off). The rust included not just the tube and pyramid, but also the exterior layer of the double wall longitudinal behind the pyramid. I have removed all of the rusted metal, but all that is left is the interior layer which is recessed into the longitudinal. I need to fabricate the exterior layer. The exterior layer also needs to be recessed but I don’t know by how much. If I go too deep the tube will be recessed too much. If I don’t go deep enough then it will not be recessed enough. I know I could just be safe and cut the end of the tube off if it sticks out too much, but I would rather just do it right and recess it the correct amount.

Here is the current situation. You can see the interior layer, but I don’t think (not sure) that the exterior is recessed quite as far back as the interior layer is.



I have replacement tubes and pyramids, so I know their dimensions. If someone could measure how far the tube sticks out beyond the flat surface on the top of the pyramid on their car, I can calculate how far to recess my replacement exterior layer. So in the diagram below, I know “A” and “B”. If someone can give me “C”, I can calculate “D”. If you can’t easily measure “C” then a combined “B” + “C” measurement (total height of tube from longitudinal) will work as well.



Thanks for the help!

[Joe Bob]

I bet if you posted a poll, the results would show that the use of the jack post is a bit dangerous and most owners go with a floor jack. "I" use the donuts at the four corners of the pan.

Either way, good luck in whatever you decide to do.

[Richard Casto]

I bet if you posted a poll, the results would show that the use of the jack post is a bit dangerous and most owners go with a floor jack. "I" use the donuts at the four corners of the pan.

Either way, good luck in whatever you decide to do.

I would only use the factory jack points for emergancy use/last resort. I am all about using other ways to lift the car such as a floor jack. I think the main reason for removing them is rust prevention and I think that is a non-issue for me personally.

You mentioned the donuts, I trust the rear donuts to lift the car and use them, but not the front. I actually am not convinced they were designed for lifting purposes even if they are commonly used for that. The front ones are not supported very well from a structural point of view.

Anyone working from home today and have the rockers off their car? (IMG:style_emoticons/default/poke.gif) (IMG:style_emoticons/default/wink.gif)