Newbie

[SB73]

Hi everyone,

Sharing my new pride & joy, 2003 Z4 E85 2.5i with 94K
Had the car for 2 months now and have gone through the following: wheel refurb, addition of original badges to the bonnet, bonnet & wheels, respray to the front bumper, new aerial, refreshed number plates, new floor mats, replaced lateral acceleration sensor, DIY refurb of the leather seats, engine clean and service

One challenge to overcome with the roof - fixed a broken wire in the roof loom, so the motor latches / unlatches and the windows now drop

Unfortunately the roof will not lower or raise, red flashing light appears after the roof is unlocked with the instrument button.
Pump was re-located to the boot by the previous owner - I have checked the brass plunger, this was sticking so I have sorted this and have topped the fluid up. I can hear the pump kick-in after the windows have dropped - have also checked the three fuses, these are ok.

Anything else I should be looking at to diagnose?

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[enuff_zed]

Welcome, nice motor.
Are you saying the motor is running?
If so, check the fluid level again. The max mark is not enough when it's at a greater angle in the boot. One of the ports is slightly uncovered and it just pumps air.
Pull it into an upright position, take the fill bung out of the top of the reservoir and use a small syringe to keep adding jack oil until it spills out the top. Then seal it all again and put it back in it's new home.
Fingers crossed this may be your only issue.

[SB73]

Thanks for the feedback enuf_zed
Once the roof has unlatched and the windows have lowered the pump appears to kick-in (rotation of the white blade).
Have just topped the fluid up as much as possible, unfortunately still no movement from the roof
Is there anything else I can look at or try?

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[buzyg]

Looking sharp for those miles. Welcome aboard.

[Mr Tidy]

Hi and welcome aboard with your smart looking Z4.

[enuff_zed]

Thanks for the feedback enuf_zed
Once the roof has unlatched and the windows have lowered the pump appears to kick-in (rotation of the white blade).
Have just topped the fluid up as much as possible, unfortunately still no movement from the roof
Is there anything else I can look at or try?

IMG_2475.jpg

Hmmm, well if there's loads of fluid and the bypass valve is definitely not stuck in then the only thing I can think is a failing pump?

[SB73]

The pump was replaced in April by the previous owner and relocated to the boot, he thought this was the reason for the roof not working.
I will take another look, just wondering if there is any recommendation on where / who to source a quality pump from?

[DMike]

Are you sure the bypass valve is sorted? Sometimes the bowden cable may need fine tuning after relocation. Try to undo it for diagnostics?

[SB73]

Thanks DMike.
I'll double check the bypass valve (presume this is the brass plunger?) in the morning.
I have not checked or adjusted the Bowden cable - what do I need to do to undo it?

[MikeyH]

Welcome to the forum nice car and colour

[Chippie]

Hi SB73 and welcome to the forum, nice looking Zed, hope you can get the roof sorted easily.

[Ole gits rule]

Hello and welcome to the forum

[enuff_zed]

Thanks DMike.
I'll double check the bypass valve (presume this is the brass plunger?) in the morning.
I have not checked or adjusted the Bowden cable - what do I need to do to undo it?

Use a small allen key to remove the whole of the black plastic bracketry around the brass plunger.
There'll then be no chance that it is being pushed in.
The plunger only moves a few mm, so double check you can push it in and it pops back out.
Try the motor like that and see.

Has it ever worked since the pump was replaced?
Just wondering if he dropped the little drive pin when swapping it over? Without that the motor will spin but the pump won't turn.

I would also query the pump replacement?
The motor and spacer block look shiny new, but the pump head looks like it's much older.

[Andrew Sheldon]

All good suggestions coming from other Z4 members regarding remedies for your roof problems. A bit of a long shot on my behalf but is there a possibility of an air lock within the system. I remember when I sorted my roof motor problems on initial start up, after filling the fluid reservoir, it did a few stops and starts before it primed the pipes. It was so bad that on closing it slammed shut quite badly due to air in the system.

[Andrew Sheldon]

Nice looking Z4 btw, very smart. Same colour as mine, she looks like a little silver bullet...