Jacking up the rear (time for definitive answer)

[CamB]

Righto. This is discussed from time to time and I would like to be clear on what is and isn't ok, so, based on this picture, where is ok to put a floor jack...

I know there are factory jacking holes on the side, I just want to know about the rear only... will worry about the front another time. Thanks!




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Cameron Baudinet
1975 911S (in bits)
1969 911T

[Vipergrün]

You can jack right on the round sump cover. Just use your floor jack and a 8x8" piece of plywood to protect it....

cheers
-Brad
80SC

[Superman]

No no no. Respectfully, I would urge against jacking agains the sump cover. Perhaps if it is done right then damage can be avoided, but it would be easy to bend that plate or even crack the case at the edge of the sump late opening.

The factory has specified that you may jack on the thick strip of cast aluminum case that sticks down just behind (toward the rear of the car) the sump plate. It can clearly be seen in the picture directly between the #1 exhaust port and the #6 exhaust port. Use a block of wood.

Awesome headers, BTW!

PS....This thread will not yield a definitive answer. STrike that. This thread has yielded a definitive answer, but there will not be unanimous support.

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'83 SC



[This message has been edited by Superman (edited 10-11-2001).]

[pbs911]

Glad that's cleared up.



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Paul
78SC Targa
Pelican Parts Members Gallery

[Superman]

I'm going to qualify my advice. Your case may be magnesium, and I am not sure if this jack point is specified by the factory on magnesium cases. I do know the factory allows this on aluminum cases.

Still, your Baby looks beautiful from below.

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'83 SC

[CamB]

Awesome headers, BTW!

Unfortunately not mine :-( They are HUGE though!

It is a picture from Dr Steve Timmins site (well known 3.6 conversionista).

I do have a magnesium case. I also have well perforated heat exchangers and the exhaust part has welded up holes. It is NOT pretty!

I should give my views. I have jacked from the section Superman mentioned and from the 4" by 1" part at the front of the engine case (before the transmission).

I have been told both are ok, and that the front is ok and that the back is not. I can get at the back a lot easier than the front, so would like to use that.

Cam

[This message has been edited by CamB (edited 10-11-2001).]

[Roland Kunz]

Hello

The sumpplate is very fragile and a NoNo.

Porsche used the rear engine carrier as they have special "Steinbock" lifters who direct snap in there.
It is also allowed to lift on the reinforcement rip from the trany witch is direct under the R&P Housing.

You also can lift on the ends from the emginecase where the Porsche lift tool sits on. Aluminiumcases ( 65-68 & 77- 2001 ) are tough enough to survive a misslift but the magnesium cases tend to leak slight ( more )oil afterwards.

Race cars have a special modified rear engine mount with a towhook and a lifterplate for fast lifting.

Grüsse

[cstreit]

...and I thought I was the only guy with Supertrapp's on my porsche..

[Jorgeman]

Wayne's 101 Projects--Pg 17--Fig 1. "The bottom engine sump is one of the best places to jack up your 911!" And he recommends using a block of wood or rolled newspaper to protect it from scratching. Do we go with Wayne or seek further?

George 86T

[Vipergrün]

Thanks Jorgeman!

I have been told by my mechanic, and have read a few places that the sump cover *is* ok, just protect it. I use a 3/4" piece of plywood... Wayne, do you have anything additional to add?

-Brad
80SC

[Greg-slant/cab]

I always used a piece of "soft" wood I.E. -redwood....and place it over the sump area and have never had any problems.

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Greg-slant/cab
http://www.geocities.com/gregslantcab/

[speeder]

I've been told to place jack under trans mount-yoke. Seems like safest place to me, I would not jack from engine even if case is safe because of backwards stress on mounts.