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Roof

Discuss problems you have had or are having with your Z4
HinesBeans
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Roof

Post by HinesBeans » Sat Jun 13, 2020 4:27 pm

Advice please, when I come to lower the roof it starts off okay then stops about a foot over. Could this be the roof motor on its way out?
The drainage holes are open and water is running freely.
The car is in for a service on Saturday so I’ll get him to take a look at it.
Has anyone had the motor replaced and if so how much would I be looking at?
Thanks
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Number5
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Post by Number5 » Sat Jun 13, 2020 5:32 pm

Roof Motors are about £125/£150 Pumps are about £150 too.
If your motor is able to pull the roof back from the windscreen and pass the top Apex, then its OK as that is the hardest part for it. After that gravity should take over until the last bit where it needs to suck it down and compact it as it folds.

You could try pulling the red hoop and check that the roof can physically fold flat and that nothing is obstructing it. Has anything been left on the rear shelf thats blocking it from a complete fold ?
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Mr roadster
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Post by Mr roadster » Sat Jun 13, 2020 5:42 pm

Hi this happened to mine make sure the shelf in the boot is at it’s lowest if its
up it won’t go down hope this helps.
If it is the roof motor a guy called Durham Dave on this site will sort it for you.

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Post by Smartbear » Sat Jun 13, 2020 6:05 pm

Mr roadster wrote: Sat Jun 13, 2020 5:42 pm Hi this happened to mine make sure the shelf in the boot is at it’s lowest if its
up it won’t go down hope this helps.
If it is the roof motor a guy called Durham Dave on this site will sort it for you.
If that shelf isn’t in its lowest position the roof won’t move at all, this seems a different issue as the roof starts it’s operation but fails to complete it :thumbsup:
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Post by Jeda » Sat Jun 13, 2020 6:41 pm

Smar
Smartbear wrote: Sat Jun 13, 2020 6:05 pm If that shelf isn’t in its lowest position the roof won’t move at all, this seems a different issue as the roof starts it’s operation but fails to complete it :thumbsup:
Rob
You’re right, assuming the microswitch is intact and not shorted due to a previous defect with a lazy owner. If the switch is bypassed roof opens regardless of shelf position.

I would check the shelf none the less, and after that try to check the roof through manual operation.

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Post by HinesBeans » Sat Jun 13, 2020 6:52 pm

Thanks for the advice, the shelf is all the way down.

I would of thought if the roof motor was broke or on its way out then it wouldn’t go part way right? .. It was working fine yesterday.
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Post by Mr roadster » Sat Jun 13, 2020 10:57 pm

Smartbear I was only trying to help I wish I had your knowledge

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Post by Number5 » Sat Jun 13, 2020 11:30 pm

Going back to my post, does the roof fold right into the boot if done manually or is there a physical obstruction.?
Also does the roof Power closed ok? If so you can discount any issues with the motor, however it is not in common for the pump to be weak in just one direction.

Try the above and report back
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Post by Smartbear » Sat Jun 13, 2020 11:53 pm

Mr roadster wrote: Sat Jun 13, 2020 10:57 pm Smartbear I was only trying to help I wish I had your knowledge
No offence taken, I’m not the smart guy with roof issues here - I’ve only got a basic understanding of them, listen to Alan not me :thumbsup:
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HinesBeans
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Post by HinesBeans » Sun Jun 14, 2020 11:19 am

Number5 wrote: Sat Jun 13, 2020 11:30 pm Going back to my post, does the roof fold right into the boot if done manually or is there a physical obstruction.?
Also does the roof Power closed ok? If so you can discount any issues with the motor, however it is not in common for the pump to be weak in just one direction.

Try the above and report back
Hi mate,

I’ve just had another look, and when I press to open it just unclips and nothing happens. I try and manually fold the roof back but there seems to be an obstruction on the first fold over if you know what I mean? .. clips back in fine.
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Post by Number5 » Sun Jun 14, 2020 12:58 pm

Usually thats the classic (Hydraulic) motor fail, if it unclips from the windscreen and then stops a couple of inches back. The fact that you said it was just not going the last foot gave a different impression.
The unclipping is driven by a different motor in the hood itself that opens the claws by means of a worm drive.

Unclip it, then pull the red hoop in the boot,(the hydraulic bypass) and see if it will then fold back easily ?
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HinesBeans
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Post by HinesBeans » Sun Jun 14, 2020 1:44 pm

Number5 wrote: Sun Jun 14, 2020 12:58 pm Usually thats the classic (Hydraulic) motor fail, if it unclips from the windscreen and then stops a couple of inches back. The fact that you said it was just not going the last foot gave a different impression.
The unclipping is driven by a different motor in the hood itself that opens the claws by means of a worm drive.

Unclip it, then pull the red hoop in the boot,(the hydraulic bypass) and see if it will then fold back easily ?
I’ve tried pulling the red hoop mate but there is no give in it?
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Post by Number5 » Sun Jun 14, 2020 2:56 pm

OK. That means your bypass valve is also seized which is also quite typical after 11-17 years of never being activated.

You’re going to need the motor out of the car and inspected/serviced.

Where are you located as there’s a few of us who offer the service ?
Alpina Roadster #307
Porsche Boxster GTS
Previous Zs
Stratus E86
G29 30i
1x Imola Z4MR
Alpina #019
10x E85 Se/Si Roadsters
2x E89's
Roof Motor Relocations (Bristol)

HinesBeans
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Post by HinesBeans » Sun Jun 14, 2020 4:18 pm

Number5 wrote: Sun Jun 14, 2020 2:56 pm OK. That means your bypass valve is also seized which is also quite typical after 11-17 years of never being activated.

You’re going to need the motor out of the car and inspected/serviced.

Where are you located as there’s a few of us who offer the service ?
Thank you for your responses mate, appreciated. I’m located in Glossop near to Manchester.
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charliebeavis
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Post by charliebeavis » Mon Jun 15, 2020 12:30 pm

I have the same problem as this and need the motor replacing.
I'm based in East Sussex. Do you know who would be the closest person to offer this service (and how to contact them?)

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