Starting E93 Engine and putting into drive on a lift?

Wodger · Today, 07:17 AM

Good Afternoon All,

This may seem a dumb question, but can i start my E93 and put into drive, on a lift with the wheels off the floor?

I only ask as i was reading elsewhere on the forum about the rollover protection deploying if the car senses the car has left the ground, tips etc..
Not sure how it would detect wheels leaving the floor exactly, but i am concerned i will trigger the rollover protection.

I recently changed my diff, giubo and centre support and now have a light rubbing while coasting at low speed. Could be brakes, heat shields etc..

When i lift the rear and spin the wheels by hand, all seems well.
Hoping that by getting a little more speed in the drivetrain and being able to move around freely under the car will help me identify it, without having to drop the exhaust and re-fit the shields etc, in a vain attempt at fixing it.

Thanks for the support!

Wodge

Efthreeoh · Today, 07:42 AM

I have a lift and I've run the drivetrain many times with the car off the ground. But I never tried with my E46 cabrio. I think the cars accelerometers would have to detect a rapid X-axis acceleration to trigger the rollover hoops to deploy. But I'd find the fuse and pull it.

Wodger · Today, 09:17 AM

Thank you for the reply!
This is a shout, ill have a dig and see what i can find on the fuse.

I believe you are right, as there is no hardware around the wheels/suspension that would detect they are off the ground.. Which i guess leaves wheel speed sensors and accelerometers.

Last thing i need is that to system to activate and deploy.. I understand the physical reset, but no idea what it would do with codes and other things it would trigger electronically

Today, 07:17 AM	#1
Wodger Registered 0 Rep 2 Posts Drives: BMW 335i Join Date: Mar 2019 Location: Milton Keynes iTrader: (0)	Starting E93 Engine and putting into drive on a lift? Good Afternoon All, This may seem a dumb question, but can i start my E93 and put into drive, on a lift with the wheels off the floor? I only ask as i was reading elsewhere on the forum about the rollover protection deploying if the car senses the car has left the ground, tips etc.. Not sure how it would detect wheels leaving the floor exactly, but i am concerned i will trigger the rollover protection. I recently changed my diff, giubo and centre support and now have a light rubbing while coasting at low speed. Could be brakes, heat shields etc.. When i lift the rear and spin the wheels by hand, all seems well. Hoping that by getting a little more speed in the drivetrain and being able to move around freely under the car will help me identify it, without having to drop the exhaust and re-fit the shields etc, in a vain attempt at fixing it. Thanks for the support! Wodge
	Appreciate 0 Tweet Quote

Today, 07:42 AM	#2
Efthreeoh General 18756 Rep 19,463 Posts Drives: The E90 + Z4 Coupe & Z3 R'ster Join Date: May 2012 Location: Virginia iTrader: (0)	I have a lift and I've run the drivetrain many times with the car off the ground. But I never tried with my E46 cabrio. I think the cars accelerometers would have to detect a rapid X-axis acceleration to trigger the rollover hoops to deploy. But I'd find the fuse and pull it.
	Appreciate 0 Quote

Today, 09:17 AM	#3
Wodger Registered 0 Rep 2 Posts Drives: BMW 335i Join Date: Mar 2019 Location: Milton Keynes iTrader: (0)	Thank you for the reply! This is a shout, ill have a dig and see what i can find on the fuse. I believe you are right, as there is no hardware around the wheels/suspension that would detect they are off the ground.. Which i guess leaves wheel speed sensors and accelerometers. Last thing i need is that to system to activate and deploy.. I understand the physical reset, but no idea what it would do with codes and other things it would trigger electronically
	Appreciate 0 Quote