Safe way to get a few more inches under car on flat surface

Question

Working on a 4 door sedan in the garage.

Need to go under the car to replace the ABS module.

Right now I can reach most of the screws, but if I could get just a few more inches of clearance it would help a lot.

Would over inflating the tires work or putting the front wheels on 2X4's?

...or are there any other safe methods?

Are wood planks equivalent to wood blocks, anything unsafe with this set-up, I tried pushing the car around, nothing seems to be moving:

Answer 1

You're not likely to be able to get inches by over inflating the tires, and if you try you're likely to exceed the design pressure and run the risk of popping the tire off of the rim. That would be dramatic.

Things you don't want to do:

• Trust a jack of any kind when you're working underneath the car.
• Trust concrete (cinder) blocks (they may be ok if they are oriented so that the load is taken in compression; they are not ok when the load is applied to the unsupported sides).

Thinks that are likely to be safe:

• A properly supported jack stand. On many the load bearing area is small and they can sink into soft surfaces such as dirt or hot asphalt.
• Wood blocks under the tires or the frame - as long as they are stable. Jack up the car and place the wood and the lower the car back onto it.
• Parking over a depression in the ground.
• Ramps designed for lifting a car to work under it.

Answer 2

I have in the past used the spare wheel laid flat to support a car after lifting it with the jack. especially when working on a dirt surface.

another trick is to drive one wheel up onto the curb, or park the car over some other natural hollow.

Answer 3

Ramps, like these; it's what they're made for. Just be sure to block the wheels to keep the car from rolling back down. I think the top platform has a small lip/depression to keep the wheel in place, but I wouldn't trust it.