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View Full Version : Floor jack placement on M3 and more


RickR
09-11-2005, 08:39 PM
I thought I would do the OCD routine on my rims and do a thorough cleaning and waxing with Klasse. I took a quick look under the rear of the car and did not see any obvious lift points for a floor jack. The only thing I saw as a rectangular hollow box like area forward of each rear wheel. Any suggestions?

The other thing I saw was that several areas of the undercarriage seemed to be coated with a yellowish white substance that looked like lithium grease, but applied as if it was an undercoating. Anybody seen this before and know what it is? Or did the dealer run over a grease gun before delivery? The greasy substance is like a grease, not a wax or tar.

I will try to get a better look at it later this week, maybe get the car up on some ramp blocks to see what it is.

Input appreciated.

Rick

Cowboy Bebop
09-11-2005, 09:18 PM
the junk you see under there is Cosmoline.
BMW puts it there to protect the cars from Saltwater during shipping.
Itr will eventually burn off - mostly.

as to the jack points
I have attached a pic that might help...

patton03m3
09-11-2005, 09:22 PM
I thought I would do the OCD routine on my rims and do a thorough cleaning and waxing with Klasse. I took a quick look under the rear of the car and did not see any obvious lift points for a floor jack. The only thing I saw as a rectangular hollow box like area forward of each rear wheel. Any suggestions?

Rick

This picture shows OEM jack points (red circles) and preferred jack points (green boxes). Don't use the rubber jack points (the ones with the x's) in front of the rear wheels to hold up one side of the car...they can collapse.

Cowboy Bebop
09-12-2005, 09:06 AM
thanks patton for that clarification... forgot to do that last night when I posted... too tired, spaced on it totally.

patton03m3
09-12-2005, 11:58 AM
thanks patton for that clarification... forgot to do that last night when I posted... too tired, spaced on it totally.

Cool, your post wasn't up when I started...you beat me by 4 minutes, and as tired as I am I'm surprised I didn't post of picture of my cat...I think the picture says it anyway...just like to reiterate since I saw some ugly pictures on another board that happened to someone...rear jack point collapsed - there is really not much underneath it apparently. Feels like a design issue...especially since there seems to be zero on the subject in the owner's manual.

liuk3
09-12-2005, 02:01 PM
This picture shows OEM jack points (red circles) and preferred jack points (green boxes). Don't use the rubber jack points (the ones with the x's) in front of the rear wheels to hold up one side of the car...they can collapse.

You say not to use the factory jack points as they are not reliable. Is this in fact correct? How can the factory indicate this for a jack point if they are not reliable. Is sounds really, really dangerous. On the other hand, I don't like the idea of using jack points other than recommended by the factory. I am confused what to use. :confused:

RickR
09-12-2005, 05:03 PM
Thanks Cowboy and Patton.... I knew someone on the forum would know the answer. I assume the dealer floor jack or the dogs on their lifts are designed to fit into those rubber boxes..... and I assume the cupped plate of a floor jact would just compress them.... so I'll use the OEM points indicated.

Thanks for the input! :thumbup:

Rick

patton03m3
09-12-2005, 11:02 PM
You say not to use the factory jack points as they are not reliable. Is this in fact correct? How can the factory indicate this for a jack point if they are not reliable. Is sounds really, really dangerous. On the other hand, I don't like the idea of using jack points other than recommended by the factory. I am confused what to use. :confused:

They have been shown to collapse when attempting to hold up one entire side of the car on just one jack point. I've seen pictures (on another forum) of just that. If used together with other factory jack points they should work fine. But don't assume they will work just because they are the factory recommendations...people have also pulled their bumpers off when using the tow hook on the front bumper. It usually works out that the people that use the car on a daily basis end up knowing more about the actual structural integrity than the people that designed the car. Unfortunately.

liuk3
09-12-2005, 11:27 PM
They have been shown to collapse when attempting to hold up one entire side of the car on just one jack point. I've seen pictures (on another forum) of just that. If used together with other factory jack points they should work fine. But don't assume they will work just because they are the factory recommendations...people have also pulled their bumpers off when using the tow hook on the front bumper. It usually works out that the people that use the car on a daily basis end up knowing more about the actual structural integrity than the people that designed the car. Unfortunately.

This just seems absolutely ridiculous. If you used the jack points and it failed, would BMW cover the damages under warranty? For them to suggest a jack point with poor structural integrity seems not only unethical, but potentially lethally dangerous.

patton03m3
09-13-2005, 06:56 AM
This just seems absolutely ridiculous. If you used the jack points and it failed, would BMW cover the damages under warranty? For them to suggest a jack point with poor structural integrity seems not only unethical, but potentially lethally dangerous.

Actually, since it doesn't come with a jack, and there is no mention of jack points in the manual...at least that I could find...it is an assumption that the rubber squares are intended to be useful. Have you found any official description of a jack point in BMW documentation? The pictures above were not provided by BMW, by the way, WRT to the jack points.

liuk3
09-13-2005, 10:23 AM
Actually, since it doesn't come with a jack, and there is no mention of jack points in the manual...at least that I could find...it is an assumption that the rubber squares are intended to be useful. Have you found any official description of a jack point in BMW documentation? The pictures above were not provided by BMW, by the way, WRT to the jack points.

Thanks. I'll look through the manual when I get a chance. Much appreciated.