Yup. The QJ itself is rock solid. I still use back-up jackstands and wood blocks, because life is precious, well, at least to me mine is Anyway, don't double stack the blocks, line up everything just so, and you are good to go. A much faster and cheaper solution are the liftbars.

 

Liftbars work, but I’ve never considered them “easy”. Lifting and lowering require in my garage an extra low hydro jack, higher lift hydro jack and jack stands. OH, and be sure and check your jack stands for manufacture or “type” recalls or usage warnings. There have been a few, recently. I should mention, liftbars are heavy, managed while stooped over. My only near accident was when the rear of a liftbar began to swing out of place. Extra precautions since preclude that from happening. I think.
I’ve NEVER had a scary incident with quickjack. Maybe that’s because of the weight balance of the 928, which this is reserved for in my garage. Yes, I use a small block on a big block. I’ve never kept a lifted setup that looked less than solid, non-vertical or sketchy before getting under the car.

If we want to see hair raising accidents, just Google “2-poster accidents”.

Just a few years ago, a pro racer was found crushed under his car. Looked for the link again, couldn’t find it. I’ll bet he was experienced.

It’s very likely in these instances, something was missed, or something required more time than was given.
I don’t consider any of the Quickjack supplier’s setup requirements to be inherently dangerous. The experiences of users should be used to enhance safety.

Choose the setup that works best for your knees and back, and follow the suppliers instructions. Enhance those instructions with usage testimonials. Get old and obsolete stands, jacks out of your garage.
… and slow down.

 

I saw some rubber Jack blocks advertised that are single piece 4.7” height (120mm) which is pretty close to the 5” of stacked QJ blocks. I’m thinking of getting a set of those to lose a fraction of height and gain a reduction in risk!

 

yeah, post them please. The sq-inch size of the block(s) matters, as well for stability

 

Here are those blocks, 160x120x120mm (the stacked blocks are 127mm).

I wonder if the eBay blocks could be stood vertically to create 160mm support, or would that be unstable? There’s about 175mm between base of lift point on car and the QuickJack plate, so would that be enough clearance for QuickJack to start lifting before it contact car?

 

I would imagine one block is always more stable than 2.

But a taller block is less stable than a shorter one.

Whats needed is an AL block with rubber ends/caps, with a broader base.

 

Not sure you understand the problem...the jack is -great-...

 

I obviously am not as intelligent as I thought. Thanks for correcting me about distinctions... I think everyone else understood what I was alluding to.

 

This is what I described... If it will hold up ships, wood cribbing makes me comfortable enough to not want to rush out from under the car.
If the rubber blocks are a required part of the system and are the problem....

 

I’m trying to catch up with the real concerns about the QJ5000. As mentioned I own and have been using one for years.
Mine has been used almost solely for my 928, curb weight~3200lb. The QJ is rated at 5k lb.
The concern seems to be the blocks.
1) double stacking allows some block shift, although I notice very little. But yes, some is there.
2) block squish: with our Porsche’s? I haven’t noticed it. But I suspect a vehicle weighing north of 4k lb might could produce that.
Are these things (above) a concern with your Porsches?

 

I never had problems with the 928 either, when I double stacked, but that is due perhaps more to the lower weight and lower weight distribution. Still, it may also be due more to being lucky I suppose. If you read the original post I put up when I opened this thread, the problem occurred with my SUV - much heavier and different weight distribution than a 928. You note "some block shift, although not very much..." I would suggest any block shift is cause for concern. I just won't ever double stack again. Maybe I'll get those tall ones posted above, but honestly, with the taller ones that came with the QJ, my cars get as high as they need to. Plenty of height without double stacking.
As to the block squish, that happens no matter what. Just inspect the blocks occasionally, and make sure that they are not dried out or cracking. You don't want them to crumble and fail. I note that hockey pucks also squish a little bit too. I carefully inspect all of these things before each and every use.

 

My favorite support method of all time has been liftbars to elevate the 928, lowering it onto wooden blocks under each wheel, allowing 21” safe elevation. Elevation and lowering with this method however is with lots of steps, 2 floor jacks, (temporarily placed) jack stands and wooden blocks, all operated stooped over with back and knees far from my 40’s.
My next house should be built around a 4- poster, but that isn’t going to happen. The next residence will likely have everyone my age, noise restrictions, limited small floor plans, bingo nights…..😢

 

I had a steel stand fail just as I was crawling out from under my sisters 70's era grand prix back in the early 80's. the bumper bolt cut my back as a result. I would rather take the extra 10 minutes and feel comfortable under a few thousand-pound machine blocked up than rely on O-rings and welds.

 

I remember the flimsy things that were referred to as jackstands back in the 80’s.
You’re reminding of it just resurfaced buried memories. 😨

 

Hi all, I'm considering getting a Quick Jack for home garage 928 service and maybe use at track events for the Coke Cola track car.
I'm thinking the 3,500 is out as it's too close to the max and the 5,000 is the recommended unit for 928.

For those of you that own one, would you buy one again based on your usage experience?

Thank you,

Dave K