Quote:
Originally Posted by Walt Fricke
Locker
Why do you jack up the rear with the jack forward of the sump cover (for the older 911s that have a cover)? That puts a bending load on the engine/transmission assembly. I'm pretty sure the assembly can withstand this load, but why? If I want both rear wheels up, but don't need the fronts up, I jack from the rear of the assembly, just forward of the motor mount. Or from the rear motor mount. This means the load path goes up to the chassis through a minimum lengthwise distance, and minimizes it. Besides, it is quicker and easier to locate the jack.
I don't bother with a hockey puck, being willing to accept the odd scrapes and gouges, but nothing wrong with a puck as long as you are extra careful about fore/aft movement until you get the jack stands in place.
|
Forward of the sump cover is safe and sturdy. Aft of it is likely just as safe, and you make a good point. I suspect, barring actually conducting the static analysis, moving the jacking point the 6 inch fore or aft won't make much a difference.
That said, if it can be done better, do it better. I'll give it a try.