Sunroof Issues

Charizma · 29th March 2015, 14:11

Afternoon all,

I've an issue with my Sunroof that has me stumped at present. While i was closing my sunroof yesterday i heard a sharp crack, the roof stuck in place half open and would not budge. Unfortunately I was 80 miles from home and it was starting to rain.

I've since opened up the cover to the motor and dropped the motor down to reveal a fractured drive cog. I've hopefully added a picture to this post.

I'd like to know if it is possible to replace the cog and where i could get one from. If not I expect i'll have to get a whole sunroof assembly

Hope someone can help!

Charizma · 31st March 2015, 13:16

Just a heads up for anyone else with this issue in the future, I got a response from another forum.

The cog is part of the motor assembly, it is not sold separately but it does appear to be common with the BMW sunroof from the 2002-2006 era, so trawling the scrappies should bear fruit! A BMW owner did just this and repaired his fractured cog!

Paulifa1 · 31st March 2015, 15:25

Hi, mine did the same, the cog is part of the motor and doesn't come off separately. If you struggle to find a good 75 motor for a reasonable price, BMW 3 series from the same era are exactly the same motor and usually available on eBay, the only difference from the rover motor, quite literally, is the part number sticker!

Be sure to find the reason for the failure before fitting the new motor, the blind might have jammed due to clip failure, causing the roof to jam and the extra load to fracture the gear, this is what had happened on mine.

Kevin Williams · 1st April 2015, 12:29

I'm pretty sure the BMW Mini sunroof is the same too, if that helps.

Charizma · 1st April 2015, 12:49

Thanks Paulifa1 and Kevin, once the roof is back in place I don't intend to open it again!

Evansabove · 1st April 2015, 14:48

There is a great video on youtube on removing and repairing the BMW 3 series sunroof which is exactly the same as the 75 roof. He had to replace the clips that hold the sunroof in place which caused the jam. Worth a look.

John

Polly · 1st April 2015, 15:42

Quote:

Originally Posted by Charizma

Thanks Paulifa1 and Kevin, once the roof is back in place I don't intend to open it again!

I assume you are already aware that you can close your roof with an Alan key?

Charizma · 2nd April 2015, 05:26

Not when the drive cog has shattered Polly, there's no way to turn the worm drive

Polly · 2nd April 2015, 21:31

It's a little while since I had mine apart, but I'm assuming it's the large nylon gear wheel that's broke.
If this is correct, yes it would not be a simple case of turning the Alan key, but if you first separate the motor from the drive gear, the key should work.
They are not all identical, but it fairly easy to separate the motor, in my case I simply opened the locking tabs and piled it out. Suitable replacements can be found on many different cars from the era, although the original circuit board would be best retained.

Paulifa1 · 3rd April 2015, 08:37

Just a point to be aware of regarding closing the roof with an allen key. Only do this if you know the motor is bad, as it is an emergency one time thing for the motor as it destroys the large cog in the motor by stripping off the nylon teeth!!

31st March 2015, 13:16	#2
Charizma Regular poster Rover 75 Join Date: Jun 2012 Location: Whitehaven, Cumbria Posts: 34 Thanks: 10 Thanked 2 Times in 2 Posts	Just a heads up for anyone else with this issue in the future, I got a response from another forum. The cog is part of the motor assembly, it is not sold separately but it does appear to be common with the BMW sunroof from the 2002-2006 era, so trawling the scrappies should bear fruit! A BMW owner did just this and repaired his fractured cog!

31st March 2015, 15:25	#3
Paulifa1 Loves to post 75 launch car Join Date: Aug 2010 Location: North East Lincs. Posts: 367 Thanks: 42 Thanked 56 Times in 41 Posts	Hi, mine did the same, the cog is part of the motor and doesn't come off separately. If you struggle to find a good 75 motor for a reasonable price, BMW 3 series from the same era are exactly the same motor and usually available on eBay, the only difference from the rover motor, quite literally, is the part number sticker! Be sure to find the reason for the failure before fitting the new motor, the blind might have jammed due to clip failure, causing the roof to jam and the extra load to fracture the gear, this is what had happened on mine.

1st April 2015, 12:29	#4
Kevin Williams Loves to post Rover 75 CDT Tourer [116 bhp] in Wedgwood Blue / MG ZT CDTi [131bhp] in Anthracite Join Date: Dec 2009 Location: Matlock Posts: 330 Thanks: 106 Thanked 66 Times in 52 Posts	I'm pretty sure the BMW Mini sunroof is the same too, if that helps.

1st April 2015, 12:49	#5
Charizma Regular poster Rover 75 Join Date: Jun 2012 Location: Whitehaven, Cumbria Posts: 34 Thanks: 10 Thanked 2 Times in 2 Posts	Thanks Paulifa1 and Kevin, once the roof is back in place I don't intend to open it again!

1st April 2015, 14:48	#6
Evansabove Loves to post Rover 75 CDT Conn SE Join Date: Mar 2008 Location: Bournemouth Posts: 272 Thanks: 1 Thanked 6 Times in 6 Posts	There is a great video on youtube on removing and repairing the BMW 3 series sunroof which is exactly the same as the 75 roof. He had to replace the clips that hold the sunroof in place which caused the jam. Worth a look. John

2nd April 2015, 05:26	#8
Charizma Regular poster Rover 75 Join Date: Jun 2012 Location: Whitehaven, Cumbria Posts: 34 Thanks: 10 Thanked 2 Times in 2 Posts	Not when the drive cog has shattered Polly, there's no way to turn the worm drive

2nd April 2015, 21:31	#9
Polly Posted a thing or two MG ZT 260 SE, ZS120, ZR105 Join Date: Mar 2014 Location: Peterhead Posts: 1,375 Thanks: 203 Thanked 350 Times in 241 Posts	It's a little while since I had mine apart, but I'm assuming it's the large nylon gear wheel that's broke. If this is correct, yes it would not be a simple case of turning the Alan key, but if you first separate the motor from the drive gear, the key should work. They are not all identical, but it fairly easy to separate the motor, in my case I simply opened the locking tabs and piled it out. Suitable replacements can be found on many different cars from the era, although the original circuit board would be best retained.

3rd April 2015, 08:37	#10
Paulifa1 Loves to post 75 launch car Join Date: Aug 2010 Location: North East Lincs. Posts: 367 Thanks: 42 Thanked 56 Times in 41 Posts	Just a point to be aware of regarding closing the roof with an allen key. Only do this if you know the motor is bad, as it is an emergency one time thing for the motor as it destroys the large cog in the motor by stripping off the nylon teeth!!