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!

[Richard Casto]

Thanks Perry, that is what I was looking for. That gives an indent of 13mm which is close to what I would have guessed it was.

It's interesting that if you start to measure some of the small details on the car how stuff ends up with really nice even numbers sometimes. 10mm, 15mm, 30mm, 45mm, etc. I can just see the guy at Porsche drawing out the design and using those nice even numbers.