Quick Jack subframe repair

[jpiazzam3]

I’m considering getting a set of quick jacks to do the rear subframe. Just curious if it’s possible to get the subframe out using the quick jacks. Or is there another direction I should look into

[oceansize]

Yep, many, including myself have done it. Plenty of room.

[Gt4]

I might be one of the few that didn’t like working with QJ. I prefer jack stand. Take less space and can access under car from anywhere. With QJ, it’s only front and rear cause side will be blocked.

[jpiazzam3]

I might be one of the few that didn’t like working with QJ. I prefer jack stand. Take less space and can access under car from anywhere. With QJ, it’s only front and rear cause side will be blocked.

Did you use jack stands for subframe. If so we’re taller ones needed


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[Gt4]

Did you use jack stands for subframe. If so we’re taller ones needed


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Yes I did used jack stands for subframe reinforcement more than once. Here is a pic doing it on my Interlagos blue M3 Dinan S3R and my Estoril blue M3:

[Tbonem3]

Jack stands for sure! Good ones too:

Can put skinny enough wheels under, too.

[bigjae46]

IMO, jack stands are the best if you're pulling out the entire rear end. Just have a long reach jack and two harbor freight furniture dollies for the wheel hubs.

I tried do a subframe removal on a lift. I found it more tiring reaching over your head trying to balance the whole thing with pole jacks.

[r4dr]

IMO, jack stands are the best if you're pulling out the entire rear end. Just have a long reach jack and two harbor freight furniture dollies for the wheel hubs.

I tried do a subframe removal on a lift. I found it more tiring reaching over your head trying to balance the whole thing with pole jacks.

Gotta lower it down onto something like this: https://ptrmachinery.com/shop/profes...carts-tp04001/

I've dropped the front subframe with engine + trans out onto a pallet sitting on one of those. Literally just lifted the car off with the 2-post.

[nahvkolaj]

I did mine with my quick jacks

[tlow98]

IMO, jack stands are the best if you're pulling out the entire rear end. Just have a long reach jack and two harbor freight furniture dollies for the wheel hubs.

I tried do a subframe removal on a lift. I found it more tiring reaching over your head trying to balance the whole thing with pole jacks.

Agree. Good idea with the furniture dollies!

[Gt4]

Agree. Good idea with the furniture dollies!

You can also consider buying 4 wheels dollies if you store your car during winter. I used mine to push my M3 as close as possible to my garage wall to get more space

[heinzboehmer]

IMO, jack stands are the best if you're pulling out the entire rear end. Just have a long reach jack and two harbor freight furniture dollies for the wheel hubs.

That's how I've done mine too:



Tip for others attempting this: don't rest the brake dust shields directly on the dollies unless you want to spend some time rebending them back into shape when you're done. Instead, stack a couple bits of scrap wood on the dollies and rest the hubs/camber arms on those.

[Cubieman]

I used a 4 post with jack stands, my 4 post has a sliding center jack which helped, the best thing would be a 2 post and a hydraulic table etc. as mentioned.

A lift is cool just for the fact you can disassemble while standing of course but a 4 post really gets in the way of suspension related items so the jack stands fix that.

I guess I can't picture how a QJ gets in the way?

[oceansize]

I guess I can't picture how a QJ gets in the way?

It doesn't for a subframe/rear end drop, zero issues with quick jacks for this specific task. Others are mentioning jobs unrelated to subframe or just their personal preference. Dropped mine on three separate occasions. Only tip is to make sure you can access the big v-shaped reinforcement bar edge bolts before lifting which is just a matter of positioning the lift rails.

1. Disconnect parking brake (inside car)
2. Remove rear wheels
3. Remove rear shocks
4. Remove v-brace
5. Remove section 2 support brackets
6. Remove section 2
7. Remove driveshaft (diff, csb, and at guibo)
8. Pull parking brake cables out from underneath car.
9. Disconnect ABS and wear sensors (passenger side) on calipers
10. Remove calipers (retainer clip, 7mm bolts).
11. Disconnect lower control arm via eccentric bolt at wheel
12. Feed caliper between control arm and trailer arm and support with something (this is to avoid disconnecting brake lines)
13. Disconnect trailer arm from frame (RTAB housing)
14. Remove charcoal filter plastic cover.
15. Disconnect rear light leveling sensor that is connected to upper control arm on passenger side
16. Remove subframe cross member bolts
17. Remove subframe bushing bolts
18. Drop rear end.

https://nam3forum.com/forums/forum/m...4563#post14563

[bigjae46]

Gotta lower it down onto something like this: https://ptrmachinery.com/shop/profes...carts-tp04001/

I've dropped the front subframe with engine + trans out onto a pallet sitting on one of those. Literally just lifted the car off with the 2-post.

I had access to a table and it definitely makes dropping an engine/transmission assembly simple. The problem is you still need to get underneath to undo the subframe bolts so the rear end will lower. That's why you can use a jack to the hold the subframe up and drop the subframe nuts and bolts. First, drop the wheel hubs onto the dollies.

Most all you don't have to find room to store the table.