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914World.com _ 914World Garage _ Jacking point damage?

Posted by: Biggles Mar 25 2020, 10:00 AM

I've noticed that the front jacking points on my car aren't level, and wondered if they've gone up as the car has been lifted - thoughts? It all seems solid.


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Posted by: SirAndy Mar 25 2020, 10:15 AM

They are crooked because those aren't jacking points!

There is noting solid on the other side, using them as jacking points means you are deforming your floorpan.
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Posted by: Biggles Mar 25 2020, 10:29 AM

QUOTE(SirAndy @ Mar 25 2020, 04:15 PM) *

They are crooked because those aren't jacking points!

There is noting solid on the other side, using them as jacking points means you are deforming your floorpan.
shades.gif


Ok not good. Thanks. I had used a reference on the world referencing round 'donuts' that were safe to jack on - evidently not! What purpose do those areas serve ?

So where is good to Jack up the car?

Posted by: dr914@autoatlanta.com Mar 25 2020, 10:37 AM

jack under the engine mounting bar, or the front cross member, these are to rest jack stands with pieces of plywood to cushion the jack stand from the donut


QUOTE(Biggles @ Mar 25 2020, 09:29 AM) *

QUOTE(SirAndy @ Mar 25 2020, 04:15 PM) *

They are crooked because those aren't jacking points!

There is noting solid on the other side, using them as jacking points means you are deforming your floorpan.
shades.gif


Ok not good. Thanks. I had used a reference on the world referencing round 'donuts' that were safe to jack on - evidently not! What purpose do those areas serve ?

So where is good to Jack up the car?


Posted by: bretth Mar 25 2020, 11:05 AM

I thought all four doughnuts were for jacking up/supporting the car. I always used a padded floor jack there and don't think i ever bent any except the rusty one under the hell hole on my car.

Posted by: Biggles Mar 25 2020, 11:13 AM

Cheers George. No engine mounting bar. It's a 6. I've been jacking on the rear donuts or on the trailing arm pick up points at the rear - no good?


QUOTE(dr914@autoatlanta.com @ Mar 25 2020, 04:37 PM) *

jack under the engine mounting bar, or the front cross member, these are to rest jack stands with pieces of plywood to cushion the jack stand from the



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Posted by: SirAndy Mar 25 2020, 11:17 AM

The donuts were used to suspend the cars on the assembly line.

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Posted by: Biggles Mar 25 2020, 11:18 AM

QUOTE(SirAndy @ Mar 25 2020, 05:17 PM) *

The donuts were used to suspend the cars on the assembly line.

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Wow. Thanks. Still learning.....

Posted by: SirAndy Mar 25 2020, 11:19 AM

And if you check the location of the donuts in the front and look at that location from above you'll find that it is only supported by the thin sheetmetal of the floor pan.
In the rear, it's only supported by the thin sheetmetal of the triangle piece in that corner.

There is nothing structural backing up any of the donuts ...
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Posted by: wes Mar 25 2020, 11:58 AM

I saved this year’s back from here.Attached Image

Posted by: kroelofsen Mar 25 2020, 02:12 PM

QUOTE(SirAndy @ Mar 25 2020, 06:19 PM) *

And if you check the location of the donuts in the front and look at that location from above you'll find that it is only supported by the thin sheetmetal of the floor pan.
In the rear, it's only supported by the thin sheetmetal of the triangle piece in that corner.

There is nothing structural backing up any of the donuts ...
shades.gif


Hi SirAndy, I'm sorry to say I don't agree with you for the rear donuts... Few weeks ago took of the triangle plate + donut to check for any rust and to make it straight again. The donut itself is directly under the frame member and supports it fully, see picture.
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The front I don't know yet...

Posted by: gandalf_025 Mar 25 2020, 03:14 PM

You can see the point on the floor ,in front of
the engine mount where it has been dented in
from many years of being jacked up with a
floor jack with a piece of wood on it..

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Posted by: rgalla9146 Mar 25 2020, 04:34 PM

QUOTE(gandalf_025 @ Mar 25 2020, 05:14 PM) *

You can see the point on the floor ,in front of
the engine mount where it has been dented in
from many years of being jacked up with a
floor jack with a piece of wood on it..

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agree.gif Very common damage on 6s but hard to avoid as it is a very
solid point on the chassis and provides great height when jacked there.

Posted by: ctc911ctc Mar 25 2020, 04:47 PM

SirAndy! MORE OF THESE FACTORY PICTURES PLEASE!




QUOTE(SirAndy @ Mar 25 2020, 11:17 AM) *

The donuts were used to suspend the cars on the assembly line.

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Posted by: mbseto Mar 25 2020, 04:59 PM

So aside from accuracy, there's no reason to replace these?

Posted by: bretth Mar 25 2020, 06:13 PM

I think if it was designed to hang the whole car on, it will stand up fine to a properly placed floor jack. I don't think i would use the rear firewall area for a jack though.

Posted by: drem914 Mar 25 2020, 06:49 PM

If those are not where we are suppose to jack the car up from, then how are we supposed to use a quick jack? I have one specifically so I don't have to use a single side lift jack to lift the car up. So much simpler to use than jack stands and a shop jack.

@http://www.914world.com/bbs2/index.php?showuser=18749 ?

Posted by: SO.O.C914er Mar 25 2020, 07:25 PM

I agree these are the jack points if they are not show something in writing from Porsche indicating the true jack points. I’ve used these since the 1980’s mine are not bent. I’m bent but they are not. av-943.gif av-943.gif lol-2.gif

Posted by: bkrantz Mar 25 2020, 08:29 PM

QUOTE(SirAndy @ Mar 25 2020, 10:15 AM) *

They are crooked because those aren't jacking points!

There is noting solid on the other side, using them as jacking points means you are deforming your floorpan.
shades.gif


There is on mine (with some custom backing plates inside the front floor).



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Posted by: 914e Mar 25 2020, 09:32 PM

QUOTE(bkrantz @ Mar 25 2020, 07:29 PM) *

QUOTE(SirAndy @ Mar 25 2020, 10:15 AM) *

They are crooked because those aren't jacking points!

There is noting solid on the other side, using them as jacking points means you are deforming your floorpan.
shades.gif


There is on mine (with some custom backing plates inside the front floor).



I thought about doing that as well. What gauge of sheet metal did you use?

Posted by: cuddy_k Mar 26 2020, 12:10 AM

QUOTE(drem914 @ Mar 25 2020, 08:49 PM) *

If those are not where we are suppose to jack the car up from, then how are we supposed to use a quick jack? I have one specifically so I don't have to use a single side lift jack to lift the car up. So much simpler to use than jack stands and a shop jack.

@http://www.914world.com/bbs2/index.php?showuser=18749 ?

I've always used the donuts...though with a quick jack the load is equally spread over the 4 of them. I suppose you could use the QJ pinch weld blocks and lift from the rockers, but you'd need to remove the rocker covers to keep them from getting bent.

Posted by: Biggles Mar 26 2020, 03:25 AM

Based on the responses, the fact the rear donuts / surrounding floorpan on my car look fine, and noticing from a picture I took where my garage jacked the car at the front I will jack it on the rear donut with a spreader plate and a spreader plate in the front corner behind the wheel arch:


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Posted by: drem914 Mar 26 2020, 10:02 PM

QUOTE(cuddy_k @ Mar 25 2020, 11:10 PM) *

QUOTE(drem914 @ Mar 25 2020, 08:49 PM) *

If those are not where we are suppose to jack the car up from, then how are we supposed to use a quick jack? I have one specifically so I don't have to use a single side lift jack to lift the car up. So much simpler to use than jack stands and a shop jack.

@http://www.914world.com/bbs2/index.php?showuser=18749 ?

I've always used the donuts...though with a quick jack the load is equally spread over the 4 of them. I suppose you could use the QJ pinch weld blocks and lift from the rockers, but you'd need to remove the rocker covers to keep them from getting bent.

For now I'll stick with the donuts. at most each is carrying 500 lbs.

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