Roof issues

UK forum for general and technical discussion about the Z3 roadster

Moderator: Gazza

Post Reply
Gareth 161
Joined: Thu 08 Mar, 2012 23:41
Posts: 118

  Z3 roadster 3.0i
Location: Cornwall

Roof issues

Post by Gareth 161 » Thu 13 Jun, 2019 14:49

I am having trouble with my electric roof in that sometimes it takes many attempts to get it to work whilst other times it works first time. This is from either the opening or closing position. Have read the posting on how to replace micro switch which looks a possibility but is there any way of checking what is causing the problem before I start ripping things apart as presumably it could be the brake switch or roof switch?. I started to look at the roof operating switch in the console but looks a bit more complicated than a simple push button switch with contacts.
Also my rear plastic window has gone opaque and although there are various write ups on polishing out scratches,is there any way to get the window clear again which actually works other than replacing the whole hood as unfortunately my window is not the zipped in variety.
Thanks for any help
Gareth
2001 3.0 Z3, 2008 Subaru Forester Xten

User avatar
Adam
Joined: Sat 21 Jul, 2007 19:43
Posts: 336

  Z3 roadster 2.8
Location: Newport
Contact:

Re: Roof issues

Post by Adam » Thu 13 Jun, 2019 15:35

I cant assist on the roof issues myself but I can for the rear screen.

I used some Autoglym Super Resin Polish and either some good old fashion elbow grease or a machine polisher to clean the rear window. It might take a few treatments inside and out to clear the screen up. You will be quite surprised how well it will come up but obviously it will never be like new (depends on the current condition of the screen)

The same applies for cleaning up your headlight lenses.

Gareth 161
Joined: Thu 08 Mar, 2012 23:41
Posts: 118

  Z3 roadster 3.0i
Location: Cornwall

Re: Roof issues

Post by Gareth 161 » Thu 13 Jun, 2019 16:10

Thanks Adam will get some and try, also will try on headlights as one has gone a bit cloudy.
Had a quote for new roof of just over £700 and not much less for taking roof off to put in new window as stitched in and not zipped.
As roof is getting a bit tired, if I can’t clean it up enough to see through then could be an early Xmas present to myself!
With the roof operation, it’s a pain as either you are in the blazing sun repeatedly trying to get it down or in the pouring rain trying to put it up. Either way one looks a bit of a t . . t and having to resort to manual operation!
2001 3.0 Z3, 2008 Subaru Forester Xten

User avatar
Gazza
Site Admin
Joined: Tue 04 Oct, 2005 21:58
Posts: 9429

  M roadster S54
Location: Romford Essex

Re: Roof issues

Post by Gazza » Thu 13 Jun, 2019 16:39

Is the pump working ?

Have you checked the ‘T’ screw on the pump ?
Gazza

"Understeer is when you hit the wall with the front of the car, oversteer is when you hit the wall with the rear of the car. Horsepower is how fast you hit the wall and torque is how far you take the wall with you"

Z3 S54 M roadster Image, BMW Z1, BMW M3 CSL, Z4M Coupe
ImageImage

Gareth 161
Joined: Thu 08 Mar, 2012 23:41
Posts: 118

  Z3 roadster 3.0i
Location: Cornwall

Re: Roof issues

Post by Gareth 161 » Thu 13 Jun, 2019 17:24

I think pump is ok and T handle in right position I assume as if I turn it back, then I can operate roof manually but it just seems strange that if I keep trying by pushing the various buttons and roof back it will eventually work electrically although will sometimes stop halfway which is why I thought it must be linked to the electrical side. Is there any way of telling if there is enough fluid in the pump in case that makes any difference?
Thanks Gareth
2001 3.0 Z3, 2008 Subaru Forester Xten

User avatar
colb
Joined: Sat 05 May, 2012 23:46
Posts: 662

  Z3 roadster 1.8 TU
Location: Newport South Wales UK

Re: Roof issues

Post by colb » Thu 13 Jun, 2019 17:25

You would get a cheaper replacement hood at Jack Smith trimmers in Swansea, worth a couple of days away from Cornwall and he completes the job in a day whilst you sightsee Swansea. Quite a lot of Z owners have used his services and all have glowing reports on his work. Well worth phoning him for a quote, you also get a choice of colours. Windows are sewn in not zipped. He has a facebook page search for Jack R. Smith Motor Trimmers on facebook. Best phone as he dosn't monitor his pages too often.
01792 461022
158 St Helen's Avenue (66.70 km)
SA1 4NQ Swansea, United Kingdom
Colb
1999 BMW 1.8 Z3
1998 Honda Deauville NT650V

Gareth 161
Joined: Thu 08 Mar, 2012 23:41
Posts: 118

  Z3 roadster 3.0i
Location: Cornwall

Re: Roof issues

Post by Gareth 161 » Thu 13 Jun, 2019 17:29

Thinking about it, I did move the pump when I changed the aerial grommet so possibly disturbed something although can’t remember if the problem started after that or not?
2001 3.0 Z3, 2008 Subaru Forester Xten

User avatar
Robert T
Site Admin
Joined: Mon 12 Jun, 2006 11:35
Posts: 10072

  Z3 roadster 1.9
Location: Cheshire

Re: Roof issues

Post by Robert T » Thu 13 Jun, 2019 22:14

You can eliminate the microswitch by disconnecting it and its loom close to where the base of the roof hinges on the left-hand side of the car, and then shorting the same two pins together in the three-way connector on the body. The other pin is for the heated rear-window of the hardtop.

The roof up/down switch and brake light switch have also been known to fail.

Cheers R.

Sent from my SM-G950F using Tapatalk

Arctic Silver '99 Z3 1.9 & Black '59 Frogeye 1275cc
Image

Gareth 161
Joined: Thu 08 Mar, 2012 23:41
Posts: 118

  Z3 roadster 3.0i
Location: Cornwall

Re: Roof issues

Post by Gareth 161 » Thu 13 Jun, 2019 23:32

Thanks Robert and that might a good first move to eliminate one possible cause although I do hear it click when lifting roof back the first few inches so assumed it was ok. However as it seems worse when been sitting in full sun on that side, possibly it could be the culprit and presumably does not cause any issues if disconnected.
I did take the roof switch out and check for any corrosion but it is a lot more complex than the switches on my old 325i so gave up and eventually managed to refit it into console.
Will see if I can get to the brake pedal switch in case there is any obvious signs of a problem there.
Gareth
2001 3.0 Z3, 2008 Subaru Forester Xten

Gareth 161
Joined: Thu 08 Mar, 2012 23:41
Posts: 118

  Z3 roadster 3.0i
Location: Cornwall

Re: Roof issues

Post by Gareth 161 » Fri 14 Jun, 2019 11:57

Hi Robert
Have traced the wire from the micro switch down to the hinge but do you know how I access the plug as not sure which piece of trim to remove and don’t want to start taking out the wrong bits!
Thanks Gareth
2001 3.0 Z3, 2008 Subaru Forester Xten

Gareth 161
Joined: Thu 08 Mar, 2012 23:41
Posts: 118

  Z3 roadster 3.0i
Location: Cornwall

Re: Roof issues

Post by Gareth 161 » Fri 14 Jun, 2019 13:31

I suppose another option is to join the wires together where they join the micro switch as that’s fairly easy to get to?
2001 3.0 Z3, 2008 Subaru Forester Xten

User avatar
Robert T
Site Admin
Joined: Mon 12 Jun, 2006 11:35
Posts: 10072

  Z3 roadster 1.9
Location: Cheshire

Re: Roof issues

Post by Robert T » Fri 14 Jun, 2019 14:39

There are some pictures in this thread of where the connector is on my car - they were taken with the hardtop installed - with the hardtop off and roof down, it is much easier to get at. The trim piece is part of the hardtop fitting kit, so you likely won't have this.

Also, take a look in the Z3 Knowledgebase under "Hardtop and Softtop" - there are articles on replacing the microswitch itself, replacing the brake light switch and on repairing the microswitch loom.

You could short the pins on the microswitch, or simply remove it and depress it firmly to rule that out. The wiring loom for it is in a sheath, so it not easy to see broken wires. And you can test the brake light switch by checking the brake lights - if they flicker, you have a dodgy switch!

Cheers R.
Arctic Silver '99 Z3 1.9 & Black '59 Frogeye 1275cc
Image

LaRy
Joined: Mon 12 Nov, 2018 17:47
Posts: 38

  Z3 roadster 2.8

Re: Roof issues

Post by LaRy » Mon 24 Jun, 2019 16:06

The Micro switch problem. It is rather common that micro switch is getting broken. Mine is replaced twice, and it was acting just as you describe. You can by pass it by connecting the wires at the micro switch, but remember to lift the roof in the correct way, while testing.
The switch is small and a little bit special, the price for an original one is in Europe approximately 70 USD. But to find a cheaper one will take long time to make it fit. It is not worth the savings.
When you get a new original one, it is including the wires. I changed those, but it is a hell of a job, to get it through everywhere from the switch to the connector, even through the tubes for the roof frame.
The first changed was made by a official BMW repair shop. I noticed, when changing, that they made it in a lazy way, and I would do the same next time. The wire was cut just 2 inches from the micro switch, and the old wires were soldered to the new ones and insulated.

Gareth 161
Joined: Thu 08 Mar, 2012 23:41
Posts: 118

  Z3 roadster 3.0i
Location: Cornwall

Re: Roof issues

Post by Gareth 161 » Mon 24 Jun, 2019 16:13

Thanks and I am beginning to think it is the micro switch as plays up more when been sitting in sun and that would fit in with other descriptions.
Sounds a good idea to join wires near switch as didn’t fancy tracing wires back.
Perhaps before I buy a new one, will try shorting wires together to confirm and will buy an original as although the write up on how to alter the marlins one was very good , it does look a bit complicated!
2001 3.0 Z3, 2008 Subaru Forester Xten

deni2s
Joined: Mon 25 Mar, 2013 22:02
Posts: 761

  Z3 roadster 2.8

Re: Roof issues

Post by deni2s » Mon 01 Jul, 2019 14:25

I might offer switch repair kit after a month or so. Might cost around 20 pounds.

Gareth 161
Joined: Thu 08 Mar, 2012 23:41
Posts: 118

  Z3 roadster 3.0i
Location: Cornwall

Re: Roof issues

Post by Gareth 161 » Mon 01 Jul, 2019 16:27

Count me in please for one as long as it's fairly easy to fit!
2001 3.0 Z3, 2008 Subaru Forester Xten

User avatar
lebigmec
Joined: Sun 17 Oct, 2010 14:04
Posts: 221

  Z3 roadster 1.9i
Location: Downham Market, Norfolk.

Re: Roof issues

Post by lebigmec » Fri 26 Jul, 2019 14:05

I would be Interested in this too, as mine plays up occasionally also.

Post Reply

Who is online

Users browsing this forum: Google [Bot] and 1 guest