Jacking up the rear of a 911

[Mr911]

Do you know the best way to jack up the rear of an early 911

Purchased the jack pad and put it into the slot to use as a jacking point. Found that it has a tendency to slip which raises my blood pressure a little. The entire side of the car comes up with the rear wheel still touching the ground. Managed to get the front wheel off but not the back.

Are there any easier jacking points which are easy to access? Tried the protruding point forward of the rear wheel but the jack doesn't extend that far. Was also thinking this was a better point for a jack stand than a trolley jack.

[Merv]

Maybe the slot for the jack has become bent at the wrong angle over time? Originally, the lever or wind-up jack fitted in that slot and, with wheels chocked on the opposite side, raised both wheels on the side lifted. The rear comes up last of course. Alternatively, on the rear only you can with a thick rubber pad put a scissor or trolley jack under the chassis point where it makes a "U" under the torsion bar. Need to be careful however to not damage the area with the jack. Then put an axle stands under the torsion bar retainer. I have a hoist so I haven't done this for a while ... The jack in the side slot should work if the car is flat and chocked and wound up enough. I keep a good more recent Porsche wind up jack for the purpose as I don't trust the original lever jacks.

[Mr911]

Thanks Merv

I don't think I have the 'original' jack that should have come with the car; I was using a basic trolley jack with the jack pad. Later model cars have the points towards the middle of the car rearward of the front wheel and and forward of the rear which made removing separate wheels quite straightforward.

The slot seems fine but as the car goes on an angle, the pad goes on that angle too, and the trolley jack just slips a little the more you lift the car up.

I'll have another look under the car and try again.

[Merv]

I don't know which year model you have, but I guess you have an early one? The jack pad increases the distance from the original jacking point but the rollers on the trolley jack may be the problem.

[Cairns888]

Mate, I use a piece of timber approx 450mm long and jack the engine and gearbox up with a trolley jack. Jack stands under the torsion bars and bobs your uncle.
It is probably totally wrong but it seems to cradle all the weight on the timber.
I haven't had to change a spare yet. I will cross that bridge when it comes.
I have never carried a spare come to think of it.
In a sports car I think a tow truck once every 10 years is worth it.
I bloody hope I haven't jinxed myself

[Oldskl60]

It may not help you right now but I know a few guys run these (see link below) tow hook and jacking pads that bolt to the case.

[klasikcis]

For what it is worth; at home I use a trolley jack which I set under the suspension outrider where the axle runs thru to the rear wheel or under the front struts. I also have a hydraulic jack and a vintage round screw type cast iron stand that I set under the end of the torsion bar. I never jack under the engine or under the sills or floorpan and it is always one wheel and side at a time. Chocks under the wheel and lay the rim and tyre under the sill and floor pan to be sure to be sure!!

[Spirit of Racing]

Changed my engine mounts the other day and I did some research and asked question.
I found the below link quite useful from pelicans who are quoting from "101 projects for your 911" by Wayne Dempsey.

http://www.pelicanparts.com/techarticles/101_Projects_Porsche_911/01-Jacking_Up/01-Jacking_Up.htm

Worked a treat - no issues or any damage.

[Merv]

I think we are all saying pretty much the same thing. However, the problem that you seem to have is that the trolley jack that you use is rolling around and with the angle created in the lift, the moment of force (engineers here please speak up) is directed outwards and the trolley jack starts to roll giving you concerns. Is that correct? I don't use a trolley jack for this kind of lift so how should you best position a trolley jack? Parallel to the car?

[Paul W]

After seeing many Porsche mechanics jack from the engine case (seam) I've always done so myself.

[9er]

After seeing many Porsche mechanics jack from the engine case (seam) I've always done so myself.

Same.

[Terminator]

Mate, I use a piece of timber approx 450mm long and jack the engine and gearbox up with a trolley jack. Jack stands under the torsion bars and bobs your uncle.
It is probably totally wrong but it seems to cradle all the weight on the timber.
I haven't had to change a spare yet. I will cross that bridge when it comes.
I have never carried a spare come to think of it.
In a sports car I think a tow truck once every 10 years is worth it.
I bloody hope I haven't jinxed myself

What he said