ktmrfs wrote:
"back in the day" the old "bumper jacks" were NOT the safest thing around either. More than once I'd seen or heard of cases where the car would roll forward/backward or side/side off the bumper jack. Lifting one end of the car off the ground with the bumper jack was not an invitation for any kind of stability.
Yes, bumper jacks had there issues I can remember Dad getting the whole family out of the '58 Ford, lifting the rear of car as high as the jack would lift, then pushing sideways to get car out of ditch. "Boys, see how easy it can fall? Be careful when jacking"
One thing that scares me when people decide a bottle jack is better than factory; You get the car up, the flat off, discover need to go up another little bit. Bumper jack or bottle jack, (or even the factory screw jack) that last bit is when the car is most likely to fall. And most bottle jacks, at least 1 arm is under the car working the jack, and the wheel isn't there to limit the down travel.
Sense I started this thread, I have discovered it takes a lot of torque on the factory jack as it gets to top end of travel. Have decided I will cut some 2X6 blocks to ride on top of spare wheel. 2 or 3 to pull the flat up on, before mess with nuts or jack, then 1 or 2 under the jack. Use wood and the engine to do most of the lifting.