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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > Regional Forums > UK > UK Technical Forum > Car Ramps



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      01-12-2016, 04:57 AM   #23
djgandy
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Quote:
Originally Posted by apollo View Post
Perfect.
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      01-13-2016, 06:07 PM   #24
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I use these ...
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      01-13-2016, 06:28 PM   #25
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Quote:
Originally Posted by apollo View Post
I would not actually use these for what they're showing them.

I'd only use the ramp to gain better access for jacking on to stands.

Decent quick video showing how to make some too.

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      01-14-2016, 03:09 AM   #26
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Ah good old MCM! Love these guys.

Thanks for the advice chaps!
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      01-15-2016, 04:41 AM   #27
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Quote:
Originally Posted by Digitalize View Post
I would not actually use these for what they're showing them.
Why not? Assuming you dont need the wheels off, the cars safer sitting like that than it is on some jack stands.
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      01-15-2016, 04:45 AM   #28
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What he said ^^
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      01-15-2016, 06:29 AM   #29
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Quote:
Originally Posted by Jules59 View Post
I use these ...
Unless there's some kind of lock, these are just as dangerous as a jack. NEVER rely on hydraulic pressure to support a car. A small leak or blown fitting are real possibility and could seriously injure or kill you.
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      01-15-2016, 10:48 AM   #30
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Quote:
Originally Posted by Aragorn30d View Post
Why not? Assuming you dont need the wheels off, the cars safer sitting like that than it is on some jack stands.
Disagree completely, there is always the chance that they could roll off. Use the proper tools for a job, like they are designed.
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      01-15-2016, 11:21 AM   #31
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And theres a chance the car could wobble off a stand too.

I'd much rather have the car sitting firmly on its wheels, on two 10" wide pieces of timber with a huge surface area and great stability, than having it wobbling around on an axle stand, which is sitting precariously on a plastic lifting point thats designed for the round rubber pads on a car lift. Especially if your driveway isnt perfectly flat and smooth.
Most axle stands arent really fit for purpose because hardly any modern car has an axle these days, yet the stands are still shaped to fit round an axle tube. They really should be equipped with the round rubberised pad that you find on car lifts and decent hydraulic jacks, because thats what the lifting points on modern cars are designed for.

There are MILLIONS of car ramps, sold for the express purpose of driving a car onto and supporting it there while you work on it. The metal framed ones and the rhino ramps posted earlier in this thread are examples of exactly that. You're not going to drive up a ramp, then jack the car and put it on stands, thats just stupid, you might as well not bother with the ramp in the first place.

They clearly serve different purposes anyway. If you need access to the suspension/brakes and thus need the wheels off, then you jack it up, put it on stands and get on with it. If you want to do an oil change, or other work underneath the car where it can stay on its wheels you just need more room underneath to work, then drive on ramps can serve the purpose just fine, without the hassle of jacks and axle stands. Ofcourse, you need to use your brain and ensure its properly chocked and whatnot. but that applies to any vehicle lifting.
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      01-15-2016, 11:26 AM   #32
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You aren't using an axle stand properly if it is:

- Wobbling
- Sitting directly on to a plastic jack point
- On an unflat/unsmooth surface

You can buy lifting adaptor pucks that fit in to the jack point, they're super cheap, and work great.

It's an incorrect technique, and that's that. I wouldn't use it, and wouldn't recommend someone else do either.
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      01-15-2016, 11:35 AM   #33
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Quote:
Originally Posted by Digitalize View Post
You aren't using an axle stand properly if it is:

- Wobbling
- Sitting directly on to a plastic jack point
- On an unflat/unsmooth surface

You can buy lifting adaptor pucks that fit in to the jack point, they're super cheap, and work great.

It's an incorrect technique, and that's that. I wouldn't use it, and wouldn't recommend someone else do either.
Same applies to a ramp. You arent using it right if you are doing it in a 10 degree incline where the car can roll off.

I'd much rather work under ramps than axle stands. As Aragorn30d says, most stands are still designed to literally hold up the axle which is almost completely pointless. They are incorrect by design and personally I dislike using them because of this. I have adaptor pucks but the fitting is still not tight and perfect like it should be for something holding up 1600kgs. If the axle stands were flat on the top I'd not be so bothered.
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      01-15-2016, 11:52 AM   #34
Aragorn30d
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Quote:
Originally Posted by Digitalize View Post
You aren't using an axle stand properly if it is:

- Wobbling
- Sitting directly on to a plastic jack point
- On an unflat/unsmooth surface

You can buy lifting adaptor pucks that fit in to the jack point, they're super cheap, and work great.

It's an incorrect technique, and that's that. I wouldn't use it, and wouldn't recommend someone else do either.
I've never seen a jacking point adaptor that converts to the correct shape for an axle stand.

Most axle stands are designed to support an Axle, like this:



The jacking adaptors sold for BMW's convert the rectangular point into a round flat disk shape that better fits a trolley jack, like this:

http://www.amazon.co.uk/BMW-Jack-Pad.../dp/B006VC8UI0

They are intended to stop the plastic jacking points being damaged by ill fitting trolley jacks.

You cannot safely put a typical axle stand, which is designed to sit round the tube of a beam axle, onto the flat plate of one of those adaptors. If you do that, the curved piece on the top of the stand will usually bend out of shape, as the weight of the car tries to press it flat.

A quick google suggests you can get flat topped axle stands, but they're pretty rare things and ive never seen a pair.
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