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Old 08-16-2007, 05:51 PM   #1
Dragonbreak
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Default Would it be safe to turn the car on and move the wheels while on jack stands?

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Old 08-16-2007, 07:07 PM   #2
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Not really seeing a huge issue. When it hits the ground, if it falls, it will stall. On second thought...make sure the car isn't pointed at anything just in case. Be careful.
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Old 08-16-2007, 07:18 PM   #3
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My guess would be no the rotational mass of the wheels would probably knock the car off the stands.
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Old 08-16-2007, 07:21 PM   #4
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Are you talking about turning the car on, and turning the steering wheel? Or putting it in gear and letting it go? I have never done either but the former should probably be safe. I don't know about the latter. Probably would not try that one. It wouldn't take much at all to get the wheels spinning like mad and like lev98 said the rotational mass might vibrate that thing right off of there.
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Old 08-16-2007, 07:27 PM   #5
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Haha! Wow, I just meant to turn the wheel while it's in the air. Not, put it in 1st! lol wow. haha thanks guys.
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Old 08-16-2007, 07:31 PM   #6
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Yes, you should be just fine. I do it all the time to make getting to front brake bolts easier and it is also in the recommended procedure for bleeding power steering systems. Naturally, just make sure your stands are at the proper locations and not under the suspension or something silly like that.
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Old 08-16-2007, 07:42 PM   #7
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Note that you likely don't need to actually turn the car on to turn the wheels when it's on the stand, you just need to turn the key far enough to free the steering lock and it will turn fine since there is no weight on the wheels.

I've done this a lot for dealing with brakes, it makes the job much easier when you get more room for the ratchets and wrenches. You don't need to do it when bleeding the brakes, but for a pad replacement, sure.
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Old 08-16-2007, 08:33 PM   #8
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^winnar
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Old 08-16-2007, 08:42 PM   #9
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I start cars that are on jack stands all the time. Easy way to check for exh leaks. You can put it in gear as well, just dont go ripping on it then standing on the brakes. Its perfectly safe if you arent a bonehead. (meaning you have the car on the stands PROPERLY, and arent an idiot about it when its running in the air)
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Old 08-16-2007, 08:51 PM   #10
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I've put it in gear and let the engine spin the wheels while on stands. I had a grinding noise while moving and this made it easy to locate.
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Old 08-16-2007, 09:39 PM   #11
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Maybe backing up the jackstands with something a little more ...welll more would be good (think 12"by12" fir under many parts of undercarriage)
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Old 08-16-2007, 10:51 PM   #12
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Quote:
Originally Posted by lev98 View Post
My guess would be no the rotational mass of the wheels would probably knock the car off the stands.
What? Think about that. Let me know the magnitude of force from the inertia and in what direction it is being applied, then tell us how that would knock the car off the stands.
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Old 08-16-2007, 11:38 PM   #13
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Quote:
Originally Posted by REX8 View Post
What? Think about that. Let me know the magnitude of force from the inertia and in what direction it is being applied, then tell us how that would knock the car off the stands.
Hmmm... I'm thinking if you get all 4 wheels spinning good and fast, the gyroscopic properties of a rotating mass will actually help stabilize the car. Until you turn the front wheels and introduce precession, thus possibly knocking the car down.

So, um, yeah. Turn the wheels while on stands. Just be carefull.
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Old 08-17-2007, 03:33 AM   #14
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Read the topic title and knew I'd get a laugh!!

Steering wheel turning is A O K.

Now which of you is going to test the wheel inertia issue? I know one of you is drinking right now and got really curious!!! lol
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