C2 on jackstands - 2 questions

[BarryK]

Heaven
thank you!
the pics are VERY handy and help a lot, especially on stand placement

 

[Viet Nam Vett]

Mark didn't give me a real answer........... it's because this is the only thing he worries about jack up

Well sometimes I use it to Jack up my Meat......

 

[BarryK]

i'm not goping ANYWHERE near THAT statement Mark.......

 

[ChuckG]

I jack mine up on the side rail - just forward of the transmision x-member - both wheels on one side come off the ground. I raise it just enough to slide in the jacks on the lowest setting. Then I do the other side + 2 notches, then back to the original side + 4 notches, then back to the other side + 2 notches. At no point is it close to tipping. I use 3 ton jack stands. Brian

That's what I do. I've been doing it for decades. Never "rolled" a car, never even close. Takes about 10 minutes to get it on 4 stands. Chuck

 

[BarryK]

Chuck
do you place the stands at about the same points as 67Heaven?

 

[ChuckG]

Chuck
do you place the stands at about the same points as 67Heaven?

Yes, exactly in the same places. Chuck

 

[BarryK]

thanks Chuck

 

[Kid_Again]

In my never-ending quest to be helpful, I'll volunteer that I jack from EITHER the sides or the front/back and block the wheels that are on the opposite end of the lift. I use a piece of 2x4 as a pad for the jack but I use a low rise jack that allows me to get under the side pipes and the rear pumpkin.

I NEVER use jack stands alone if I am going to be under the car for any length of time longer than an oil change. It doesn't matter whether the jack stand is rated for 2 tons or 20 tons, I don't like the small footprint of the jack stands. I use either 4x4 or 6x6 cribbing and have the jack stands there as a back up. I stack the wood perpendicular to the length of the car.

 

[BarryK]

Kid

i'm surprised you have to jack up your car at all. I thought when your car needed work you just left it in Mark's driveway and than went back a few days later when he was finished with it.


although how Mark manages to jack up your car with that tiny little jack of his he uses for beer is beyond me.

 

[WayneC]

Barry, things are always going to move some...

when you raise the jack, the arm swings up in an arc, moving upward, and at the same time, toward the rear of the jack. So if the arm stays planted on the frame, either the jack or the car HAS to move to accomodate the arc as the top end of the jack arm moves closer to the rear of the jack in it's arc. the higher you raise the car, the more the arm moves towards the rear of the jack. So either the car is going to move or the jack will slide, and the movement will appear greater (more precipitous) if the jack is not perpendicular or parallel to the frame rail, especially on a rough surface where the jack wheels can't easily move... if they can't move, the car frame has to move, in a direction that isn't straight up. If you jack at a crazy angle to the frame and the jack wheels can't move, the frame will move and the movement will be multiplied the further the arm moves away from the the original jack/frame contact point, pulling the frame with it (ie, if you watch the rear end of the car while jacking in front of the rear wheel, the frame may only move 1 inch at the jacking point, but the frame is pivoting off the fixed front wheel, so the far rear corner of the frame may move 2 inches)

My approach to raising all fours is to drive one end up on a pair of car ramps, then chock the tires on the ramp and jack up the other 2 corners (preferably at the third member, rolling the jack in from the rear) to insert jackstands under the frame... if the car is operable... otherwise I first jack it up under the front lower shock mounts and slide the car ramps under the front tires one at a time.

 

[BarryK]

Wayne

yes, I realize now that a little movement is going to be normal as I'm jacking it up because the angle changes as the car raises up. I actually did think of that immediately as I saw it happening but never having put a car up on jacks before and being a bit nervous about it while I was doing it I felt it was best to stop, wait, and ask questions to confirm to be on the safe side before proceeding further.
Better safe than sorry!
Thanks for the info and confirming the movement is going to be normal though
Now when I go back to raise the car again I won't have to be as concerned about a little jack movement as I'll know to expect it.

 

[Rollin's65]

Lets take the pucker factor out! What if? we were to have two jacks and 4 jack stands.
Do I have this right? Block the rear wheels front and rear on each. Jack the front end up by the side rails on each side. Place two jacks stands next to the jacks and lower down on the jacks. Move the jacks to the rear on each side rail and jack up equally each side. Place the other 2 jacks on the side rails and down we go on the rear 2 jacks.
2 jacks sure gives a person that yum in the tumy feeling.
Sure hope I'm doing this right.