CV8Z roof rusting around sunroof?

[Z8VC]

Hi everyone,

I'm starting this thread to see if there are any other Holden owners out there who are suffering a roof rust problem????

I have a CV8Z Phantom Monaro that came out with the factory sunroof, which I bought from new, it has done 40,000kms and has been garaged everyday.

I noticed there was some raising of my sunroof rubber on my roof and took it back to my local dealership, and they referred me to a panel beater.

Anyway, it is rust! It's out of warranty by 18 months and Holden have been fantastic about it, offering to repair it (which its away now getting down) but it got me to thinking how many other Monaro drivers of this CV8Z model or any Holden driver with a sunroof is suffering the same problem.

It is a massive task I was at the panel beaters Thursday checking out the damage. Originally it was going to be a standard grind off and fill procedure and refit a new sunroof, however the DAMAGE WAS THAT BAD with it going right through that a brand new turret (roof) has to be welded in, and then trucked to Melbourne to the sunroof company for them to redo another sunroof (hopefully right this time). Apparently the company who does Holden's sunroofs (who shall remain unnamed in this forum but people probably already know) didn't treat the metal properly when they cut out the hole for the sunroofs.

I'd be interested in seeing how many other people have suffered a similar problem or better yet let people know and get them out in the garage checking out their roofs. It seems terrible to me that you can pay $65,000 for a car and it be rusting at such a fast rate early in its life. Maybe Holden should change Sunroof companies. With my repair bill currently sitting at $5900 and its still not done they should be kicking the sunroof companies backside and tell them to do the jobs right.

Any feedback welcome

[old_mate]

props to Holden for fixing it, although i know Ford have also been quite good with territory's and anything painted shockwave blue that has rust/paint peeling problems.

wonder what these companies think is going to happen when they install stuff like this on the cheap

[planetdavo]

Good service from Holden.
Personally, I'd never own a single sunroof equipped car after being in the auto industry. The vast number of blocked sunroof drain tubes leading to terminal rust in the turret (roof skin) needs to be seen to be believed...

[hRTHSV]

All due credit to Holden for fixing that, I bet that made you happy, I think I would have left the sunroof out this time.

We had an Advntra Lx8 for a while with the factory sunroof and I was careful to check it just in case.

[Z8VC]

I never wanted a sunroof myself, but thats how the model came out so what can you do!

I was bloody pissed when I first discovered it I can assure you. And I did think about leaving the sunroof out, but then I'd have to replace the hoodlining? and although i'd only used the sunroof once in its whole life, i still wanted to keep the model original! I have been assured by Holden the sunroof installers have been told to do it bloody right this time!

I have to say I am extremely happy with Holdens service, I couldn't be happier. its not their fault they don't put the sunroofs in, but perhaps they may need to look and make sure those companies that are fitting them are doing the right thing!

[John_LS1]

a factory HBD sunroof should have a rolled edge where the hole is if it was done properly. maybe they were taking shortcuts? at least holden are helping you out to get it fixed.

[lowriding]

Big credit to Holden for fixing what is probable a fairly isolated case .... compare that to Ford and the Territory and Falcon rust issues . Those guys can't get much love to fix their cars in warranty and it's a design issue your getting great service from something a year and half out of warranty probably the fault of a third party supplier . Credit where credits due ,Good job Holden :goodjob:

[KrisR]

CV8Z here, so far knock on wood no issues with the moon roof. I personally did not want a big hole in the roof but unfortunately as you said it's a standard feature with the Z's.... It's just another place for water to get trapped/rust and leak.

[H5VT0NN3R]

Sounds like alot of work has to go into repairing it but it's awesome that Holden is helping you out with it. Hopefully its not to common, being only a few years old it'd be pretty bad if this sort of thing is widespread already and should mean a change of sunroof companies.

[tezzastreasures]

hi all. if it has a rubber around the sunroof opening it is a non genuine roof that has been put in after the car has been built. by hbd usually. it is still classed as a genuine roof though. all factory fitted genuine sunroofs have no rubber and a metal rolled edge. as the roof has to be cut obviously it exposes the roof to the possibility of rust as there is only a silicone seal bead under the rubber to hold the rubber down. there is only the thickness of the roof metal exposed when cut as it is a very clean cut. it is then painted with a rust preventative by hand which is not a perfect solution but the only realistic one. any break or crack and that will allow rust to start if there is any bare metal obviously. again a credit to holden for fixing it.:goodjob: it should have a hbd build plate under the bonnet with snr on it if you got the roof fitted before you took delivery of it.
cheers tezza

[CV8ZD]

No problems here. I thought the CV8Z sunroof were actually fitted at the factory as opposed to the HBD 'dealer fit' options for all other holdens?

[Z8VC]

The sunroofs in the CV8Z's are not HBD nor were they fitted at the factory. They were "factory fitted" at the request of Holden by a third party, apparently this is how Holden do the sunroofs now to be classed as factory fitted. I don't know thats what Holden and the Holden district service manager told me.

[KrisR]

I think they're Webasto sunroofs fitted by Webasto themselves. When I was talking to the previous owner of my CV8Z I had asked him if he had the sunroof whistle fixed and he said yes, Holden sent it went back to Webasto and they sorted out the seal for him under warranty.

[sk0690]

Good service from Holden.
Personally, I'd never own a single sunroof equipped car after being in the auto industry. The vast number of blocked sunroof drain tubes leading to terminal rust in the turret (roof skin) needs to be seen to be believed...

Davo, is there a procedure of cleaning the drain tubes for these sunroofs?

Cheers

[redvxr8clubby]

Davo, is there a procedure of cleaning the drain tubes for these sunroofs?

Cheers

+1, something I would check out when I see a sunroof equipped car, can I spot any rust, that and leaks. When I bought a VX Calais with a roof I wasn't too worried about the roof. My Dad used to have an XB hardtop with a roof and it developed a fair bit of rust. Didn't help we lived at Curl curl at the time, not far from beach.

[surfwagon]

Geez I'm worried now, my senator has the rubber mould around the sunroof as mentioned above and I live near the beach.
Now I will make sure I keep the salt washed off the roof more regularly and I also would like to know if there is a procedure for checking/cleaning the drain holes.



_______________________________________________
http://www.ls1.com.au/forum/showthread.php?t=121025&highlight=senator

[STod.]

Ive had sunroof problems with both my CV8Z and VZ GTO, both leak very badly. Been talking to the guy in Perth that does all Holdens sunroofs, and he reckons all of the sunroofs fitted to monaros were done after the car was made, not sure about this though. And that they use the sedan sunroof for the monaro even though the monaros roof is more rounded. All these reasons contribute to the leaking. Apparently they can take the sunroof off and bend it a little bit so it fits better. I have had a thicker seal put around the CV8Z sunroof with little improvement. Maybe its a rust problem.

From what Ive learnt, Id say Holden didnt have the expertise to fit the sunroofs properly.

[Z8VC]

He is right all of the sunroof were fitted after.

I've never had a problem with my sunroof leaking and as i stated earlier i'd only used it once. My panel beater said the rubber is sealed pretty tightly to the roof so there should be no reason water would be getting under there and as he said there is no rusting around the windsreens and the rubbers at the front and rear windscreen are the ones that can catch water under them. If the metal had been treated properly when the hole was cut for the sunroof there shouldn't be a massive problem this early in a cars life with rusting. He reckons it has been rusting from the inside since day 1. Nothing was going to stop it.

Just thought people should check their cars and be aware that apparently there is a problem with these sunroofs and this model now, and thought it'd be nice to hear others are or have had a similar problem. It's all been pretty disheartening really.

[surfwagon]

Ive had sunroof problems with both my CV8Z and VZ GTO, both leak very badly. Been talking to the guy in Perth that does all Holdens sunroofs, and he reckons all of the sunroofs fitted to monaros were done after the car was made, not sure about this though. And that they use the sedan sunroof for the monaro even though the monaros roof is more rounded. All these reasons contribute to the leaking. Apparently they can take the sunroof off and bend it a little bit so it fits better. I have had a thicker seal put around the CV8Z sunroof with little improvement. Maybe its a rust problem.

From what Ive learnt, Id say Holden didnt have the expertise to fit the sunroofs properly.

So maybe the sedans are ok and its really only a problem with the curvier roof of the coupes.
__________________________________________________ _
http://www.ls1.com.au/forum/showthread.php?t=121025

[tezzastreasures]

actually your car won,t have a build plate because it wasn,t a hbd accessory as such but a deal done with holden. from what i,ve been told all cv8z coupes were done by hbd in adelaide as a third party contract. all sunroofs are webasto and yes they are sedan ones that have been bent a little more around the edges and moved forward in the roof panel due to the rear screen being so close. if you want to check the drain tubes just pour water down them and check under the rear wheel arches for water coming out. also check to see if water comes out the front area near the lower front guard as there is a drain tube there as well from memory. it,s been a while since i,ve done a monaro. if no water comes out try a quick blow out with some air to clear them. you can see the drain tubes in your boot if you pull the covers back and look forward towards the wheel arches.
cheers terry

[Peter B - CV8]

I ordered a "factory" sunroof from new. It was installed after the dealer received the car - and it's a Webasto roof with a thin rubber seal - with a felt finish (approx 5 mm wide). My understanding is that all monaro's were done this way (ie no sunroofs installed on the actual production line).
There are 4 drains on mine ie 1 in each corner. 2 drain to the rear quarters & 2 to the inside door jambs. No sign of rusting in mine & I love it.
Good to know about possible corrosion problems - and to keep the drains unblocked :goodjob:

[Peter B - CV8]

I ordered a "factory" sunroof from new. It was installed after the dealer received the car - and it's a Webasto roof with a thin rubber seal - with a felt finish (approx 5 mm wide). My understanding is that all monaro's were done this way (ie no sunroofs installed on the actual production line).
There are 4 drains on mine ie 1 in each corner. 2 drain to the rear quarters & 2 to the inside door jambs. No sign of rusting in mine & I love it.
Good to know about possible corrosion problems - and to keep the drains unblocked :goodjob: No HBD plate on mine

[Party Pete]

No problems with leaking from mine which was fitted with a HBD sunroof from new. I will be checking the drainage now.

[sk0690]

actually your car won,t have a build plate because it wasn,t a hbd accessory as such but a deal done with holden. from what i,ve been told all cv8z coupes were done by hbd in adelaide as a third party contract. all sunroofs are webasto and yes they are sedan ones that have been bent a little more around the edges and moved forward in the roof panel due to the rear screen being so close. if you want to check the drain tubes just pour water down them and check under the rear wheel arches for water coming out. also check to see if water comes out the front area near the lower front guard as there is a drain tube there as well from memory. it,s been a while since i,ve done a monaro. if no water comes out try a quick blow out with some air to clear them. you can see the drain tubes in your boot if you pull the covers back and look forward towards the wheel arches.
cheers terry


Thanks Terry for the drain location info.

If possible, can anyone post pics of the darin tubes so I know what to look for and keep them clean?

Cheers

[RABSP]

I have a VT II Calais with the HBD factory sunroof.

She is just over 10 now and there is no sign at all of any rust.

I have checked with four otehr guys at work that have sunroofs, and none have any rust.

Must have scratched the paint during install and not patched it.

[super coach]

Here are some shots of the CV8Z sunroof. I notice there is a black rubber running around the outside of it just like the front window rubber. Does this mean it will have a tendency to lift from the metal work?

If these sunroofs were fitted to the cars after they came off the production line does that mean no rolled edges? I too am interested in finding the drainage holes. Where abouts around the sunroof surround has the rust developed Z8VC? And how far has it spread?


http://i97.photobucket.com/albums/l225/supercoach24/21687946.jpg

http://i97.photobucket.com/albums/l225/supercoach24/24420339.jpg

http://i97.photobucket.com/albums/l225/supercoach24/27167234.jpg

[LTH-00L]

I've got a 2004 CV8-R which has a HBD sunroof. (Even has a plate under the bonnet stating this)

I've havent had any issues with mine at all.

Cheers

[Z8VC]

The rust is around the entire hole where the sunroof sits in mostly under the rubber, consequently pushing the rubber up, and has spread about a 1-1.5cm in some places all the way around. This is why i started this, the company who fitted the roofs did not treat the metal properly or at all when they cut out the holes, thats a "quote from Holden" by the way not me!


P.S i also LOVE the car other than this little concern.

[Z8VC]

The rubber you're referring to in your first paragraph, is not like a windscreen rubber, it does not lift up like windscreen rubbers do they are sealed down tightly to the roof with an adhesive, probably silicon. Water cannot get under this rubber if it is sealed properly. which mine was.

[super coach]

well thats good to hear about the rubber surround. How are the repairs going on your car Z8VC? did you happen to take any photos before and during the repair?

[tezzastreasures]

the drain tubes are 20mm clear plastic tubes. you can actually see the ends of them sticking out under the car if you have a look at the the inside edge of the body just behind the wheel arch at the rear of the car on both sides. its pretty unusual to get a blocked drain tube. i,m not saying it doesn,t happen but you would have to be pretty unlucky because when you think about it not much but water can get in there unless you tend to leave it up and other stuff falls in. all you have to do is open the sunroof and do a quick visual check for maybe a leaf or something stuck in there. you cannot see the front ones as they run inside the front pillars and exit out a hole in the front lower behind the kick panels. hope this helps.
cheers terry:):)

[mickeyVX350]

We have a VTII Calais with the Hollandia roof. I am going to check it after work as it has lived outside and been treated terribly all of it's life.