The manual stated to turn OFF engine, then turn steering wheel lock-to-lock left and right.

This is really hard to do and it seem to put a lot of stress on the steering column. Remember, with the engine off, the is no hydraulic assist at the steering rack, so all the steering/turning must be done via the steering column.

I'm concerned that the torsion bar and flex couplings inside the steering column could get damaged.

Attached below the the factory service manual. I've seen mis-prints before?

What are your thoughts? Any ASE mechanics in here?

 

Do what it says...I usually do it with the engine on and it hasn't been an issue but don't blame me if you break something.

 

You do know that cars used to come without power steering. Turning the wheels didn't hurt the steering column then and it won't hurt it now.

 

well not entirely true Cars with no power steering assist were designed that way in mind. The steering column has no torsion bar, which activates the hydraulic solenoid for left or right. I'm sure the couplings are probably beefier as well. And finally the steering ratio is probably more truck-like, making it easier to turn, but more revolutions for each steering angle increased.

 

Park the car in the grass/dirt if you are concerned with the stress of this method...or raise the front wheels off the ground and do it...

 

I actually put it on an alignment rack with front wheels on turn plates. But I made this post because my partner insist that the front wheels be on the ground to be properly done.

 

done mine twice up the air now

 

I'm sorry, you did yours twice with wheels up in the air?

 

I did mine with front wheels off the ground, worked great, no problems.

 

why not just drive the car and fill it as it goes down? you are making a big deal out of nothing.

 

Remember do not use regular power steering fluid..