Not a good idea to put a jack under the oil pan

[elgyqc]

Originally Posted by john12312

Whoever suggested that must not like you. Any google search on jacking up a Boxster from underneath the car will provide guidance and none will tell you to use the oil pan as a support.

It was not me who did this, the cracks where evidently there when I bought the car three years ago. I hope no one is foolish enough to jack up the car using the engine sump... but some people suggest supporting the engine with a jack under the sump.

From the Pelican Parts site technical articles:
"Replacement of the mounts couldn't be easier... Gently place the floor jack under the engine sump, taking care to only apply enough pressure to relieve tension on the front mount... "

Note that this article does not even suggest using a block of wood between the jack and the sump.

[Starter986]

Originally Posted by elgyqc

It was not me who did this, the cracks where evidently there when I bought the car three years ago. I hope no one is foolish enough to jack up the car using the engine sump... but some people suggest supporting the engine with a jack under the sump.

From the Pelican Parts site technical articles:
"Replacement of the mounts couldn't be easier... Gently place the floor jack under the engine sump, taking care to only apply enough pressure to relieve tension on the front mount... "

Note that this article does not even suggest using a block of wood between the jack and the sump.

My recollection entirely isn't clear... but when I replaced my water pump and motor nount I may have blocked the pan jacking up the engine an inch or two to clear a bolt. No harm done.

I wouldn't do it as a matter of routine practice.

[10/10ths]

…..Porsche included an Owner’s Manual with every car.

[Rob175]

…..Porsche included an Owner’s Manual with every car.

.....but that assumes people READ!....... usually a wrong assumption!...LOL

[jaykay]

There is of course a central structurally sound unapproved jacking location in the middle........but if you get the wrong spot you will potentially damage other stuff.

My car is so low in ride height that I usually jack from the lower control arm hinge near the upright and then get one stand at a time under the rear jacking points. Then go for the central location if needed, to go higher.

I believe I have used the pan toward the edge to support the engine only but I have a Mantis deep sump which is a fairly thick billet aluminum component. If one plans to change transmission mounts is there a recommended support location on the engine / trans.?

...without the use of the support bar?

[JFP in PA]

Originally Posted by jaykay

If one plans to change transmission mounts is there a recommended support location on the engine / trans.?

...without the use of the support bar?

No.........

[JFP in PA]

Originally Posted by elgyqc

It was not me who did this, the cracks where evidently there when I bought the car three years ago. I hope no one is foolish enough to jack up the car using the engine sump... but some people suggest supporting the engine with a jack under the sump.

From the Pelican Parts site technical articles:
"Replacement of the mounts couldn't be easier... Gently place the floor jack under the engine sump, taking care to only apply enough pressure to relieve tension on the front mount... "

Note that this article does not even suggest using a block of wood between the jack and the sump.

Just another example of questionable information posted by them. You should NEVER use the sump to support the engine, even for a few seconds. There are tools to do this properly without damaging anything: Engine support bar