This Pin 12 trick to open the boot

Stash36 · Post by **Stash36** » Sun Dec 03, 2023 2:38 pm

Ok noted, thanks.
So I may have all hoses correct and second unit has failed? Is there a foolproof way of tracking hoses back or ruling out one by one?

RobbiZ4 · Post by **RobbiZ4** » Sun Dec 03, 2023 2:43 pm

Stash36 wrote: ↑Sun Dec 03, 2023 2:38 pm Ok noted, thanks.
Is there a foolproof way of tracking hoses back or ruling out one by one?

That depends....

The ones from the roof shell are very difficult to track without cutting each zip tie from top to the bottom.
But those on the main cylinders as well as on the couplings easily can be checked visually.

RobbiZ4 · Post by **RobbiZ4** » Sun Dec 03, 2023 2:46 pm

Stash36 wrote: ↑Sun Dec 03, 2023 2:38 pm ... and second unit has failed?

Unfortunately, this cannot be ruled out. Only a test with a pump that is confirmed to be working can provide certainty.

RobbiZ4 · Post by **RobbiZ4** » Sun Dec 03, 2023 3:21 pm

In my Hydraulic-TestBox...

... I've marked all the hydraulic hoses with special zip ties with marker fields. That could be an option for you as well:

: Bild1.jpg (103.87 KiB) Viewed 914 times

Chippie · Post by **Chippie** » Sun Dec 03, 2023 5:40 pm

RobbiZ4 wrote: ↑Sun Dec 03, 2023 2:43 pm
Stash36 wrote: ↑Sun Dec 03, 2023 2:38 pm Ok noted, thanks.
Is there a foolproof way of tracking hoses back or ruling out one by one?
That depends....

The ones from the roof shell are very difficult to track without cutting each zip tie from top to the bottom.
But those on the main cylinders as well as on the couplings easily can be checked visually.

Is it possible to disconnect the hoses and blow down each pipe in turn to see which is which?

Stash36 · Post by **Stash36** » Sun Dec 03, 2023 6:17 pm

Wow what a setup Robbi.
I bought these plastic clip on numbers that work well, can slide them out of the way to get access.
Still, hasn't stopped me possibly messing up

Interesting idea Chippie, not sure how that would work. I'll have a think over the week and try something else next weekend.

RobbiZ4 · Post by **RobbiZ4** » Sun Dec 03, 2023 6:39 pm

Chippie wrote: ↑Sun Dec 03, 2023 5:40 pm Is it possible to disconnect the hoses and blow down each pipe in turn to see which is which?

That could be tricky, as each hose has a diameter of only 2 mm. At first you have to blast out the oil over 3,30m(!) I'm not sure if that works without any adapter for the air gun.

RobbiZ4 · Post by **RobbiZ4** » Sun Dec 03, 2023 6:42 pm

Stash36 wrote: ↑Sun Dec 03, 2023 6:17 pm I'll have a think over the week and try something else next weekend.

Well, if you've mixedup two hoses from one side of the roof shell, it should turn immediately instead of trying to move forward or backward. That should be easy to diagnose visually.

Stash36 · Post by **Stash36** » Sun Dec 10, 2023 4:38 pm

Update, I had hydraulic lines 11 and 21 the wrong way around. Still not there are the rear shell is moving like a crab, suspect something bent whilst I've been trying to sort this, but a a problem for another day.
Can get windows up finally!

How do I get the boot lid out of maintenance mode?

RobbiZ4 · Post by **RobbiZ4** » Sun Dec 10, 2023 5:20 pm

Stash36 wrote: ↑Sun Dec 10, 2023 4:38 pm ...the rear shell is moving like a crab

What do you mean by this: the roof shell is moving very slowly or it gets caught somewhere?

Stash36 wrote: ↑Sun Dec 10, 2023 4:38 pm How do I get the boot lid out of maintenance mode?

Just pull the BMW emblem when the roof is fully closed or fully opened.

Stash36 · Post by **Stash36** » Sun Dec 10, 2023 5:47 pm

So it does! Thank you Sir

I'll make a video of the movement when I get a moment.

Stash36 · Post by **Stash36** » Sat Dec 16, 2023 5:44 pm

Ok, my crab like rear shell. Cant see anything obvious but I'm sure something must be out of shape.

https://youtu.be/78elbybZWPU

https://youtu.be/rRf77aH86pQ

B21 · Post by **B21** » Sat Dec 16, 2023 5:51 pm

Stash36 wrote: ↑Sat Dec 16, 2023 5:44 pm Ok, my crab like rear shell. Cant see anything obvious but I'm sure something must be out of shape.

https://youtu.be/78elbybZWPU

https://youtu.be/rRf77aH86pQ

Oh dear not good..quite a thump when the shells go into the boot too..

RobbiZ4 · Post by **RobbiZ4** » Sat Dec 16, 2023 8:52 pm

Obviously a problem with one of the hydraulic rams in the rear roof shell or, a problem with the hydraulic pump!
Can't be justified in any way!

Only tests with replacement parts can identify the real issue. Keep in mind, that hydraulic rams have to be replaced pairwise. If not, the new one will move with a different speed as the old one on the other side and you will run into the exact same problem!!

Stash36 · Post by **Stash36** » Sun Dec 17, 2023 11:01 am

Thanks Robbi.

Movement was exactly the same with both complete motor units, so I think the motor/pump is good. (Have returned one now for refund).
How certain are you about the RAM and something not being bent? When only one side was lifting the rear shell did twist quite a bit.
The steel looks damn strong and unlikely to bend though, I would think.
I know that's an unfair question but really value your opinion.

And if I go for new RAMs, is it these part numbers... 54377223337 and ..3338?

How hard is the job, I've searched this forum and cant find it being done, I saw one thread where I think you advise its a four hour job?

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