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Model specific boards => Golf mk7 => Topic started by: willni on 18 March 2024, 18:50

Title: Attention - New Rust Point - Front Arches Chassis
Post by: willni on 18 March 2024, 18:50
Folks,

Just letting you all know for those that keep cars for long periods of time. When I was removing the foam triangles under the front arches I noticed the following on the body:

The plastic arch liners are rubbing through the token amount of paint VW have sprayed on at the factory and leaving it as a bare metal exposed area on the body, and will undoubtably become a problem later on.

I'm currently repairing mine but not sure what to put over it once neutralised and resprayed, seam sealer?

(https://i.postimg.cc/8zYVsx5v/IMG-0323.jpg) (https://postimg.cc/HrbNhZbW)

(https://i.postimg.cc/dVbSbF35/IMG-0328.jpg) (https://postimg.cc/21xwWP4W)

(https://i.postimg.cc/W4KrWp44/IMG-0324.jpg) (https://postimg.cc/5HB6jVLc)
Title: Re: Attention - New Rust Point - Front Arches Chassis
Post by: Jace on 19 March 2024, 09:38
once sealed maybe something like Helicopter tape ?
Title: Re: Attention - New Rust Point - Front Arches Chassis
Post by: Adam T7 on 19 March 2024, 10:14
Aren’t (according to the brochure) body panels galvanised and (this is from my dim and distant past schooldays 45 years ago) a galvanised surface can ‘heal’ itself?
Title: Re: Attention - New Rust Point - Front Arches Chassis
Post by: coolhandluke123 on 19 March 2024, 11:25
once sealed maybe something like



Helicopter tape ?
After all the issues with the foam on the MK5 wheel arches you'd have thought VW might have learnt a lesson.
Title: Re: Attention - New Rust Point - Front Arches Chassis
Post by: willni on 19 March 2024, 11:40
Galvanised surfaces can still corrode unfortunately, and abrasion can remove the zinc coating from the steel.

One side reacted fairly heavily to the rust neutraliser and the other had a much smaller reaction, I resprayed with graphene primer and put a bit of underseal over it for now, but will be going back later and adding better protection. Probably that helicopter tape Jace recommended.

I considered something like dynamat sound deadening but concern that the bituminous material could hold moisture.
Title: Re: Attention - New Rust Point - Front Arches Chassis
Post by: Adam T7 on 19 March 2024, 12:54
I’ve used helicopter tape on my bike where the chain can potential hit the carbon fibre chain stays. Zero damage after 11 years and 100% water and oil resistant.
Title: Re: Attention - New Rust Point - Front Arches Chassis
Post by: Tractor Dave on 19 March 2024, 13:17
Dinitrol 447 is very good.
Title: Re: Attention - New Rust Point - Front Arches Chassis
Post by: EB2019 on 19 March 2024, 20:51
Thanks for the info Willni, will keep an eye out for it.  :wink:
Title: Re: Attention - New Rust Point - Front Arches Chassis
Post by: Mikeyd1 on 21 March 2024, 20:47
once sealed maybe something like Helicopter tape ?
what your mileage mate . I hate finding this sort of stuff on my pride and joy I’m also very fussy about my car . I’ll be checking mine soon as was planing to dynax under arches in late summer .
Title: Re: Attention - New Rust Point - Front Arches Chassis
Post by: willni on 22 March 2024, 18:52
I'm on 32k miles.
Title: Re: Attention - New Rust Point - Front Arches Chassis
Post by: Mikeyd1 on 22 March 2024, 20:54
Still very low .feel for ya mate, know likes seeing this stuff on our cars .  Let me know how u get on as I said when I pull my arches I’ll be checking mine . My mates Gti 2018 at the rear arches have quite a few of zinc inclusions as well so something to keep an eye out for .
Title: Re: Attention - New Rust Point - Front Arches Chassis
Post by: symonh2000 on 23 March 2024, 11:08
Our 2016 car has a fair bit of rust on things like the subframe, drive shafts and suspension arms which I will need to deal with.

My Mk4 Golf had many faults but even at 10+ years old it didn't suffer any rust problems on critical parts.
Title: Re: Attention - New Rust Point - Front Arches Chassis
Post by: willni on 23 March 2024, 12:26
Our 2016 car has a fair bit of rust on things like the subframe, drive shafts and suspension arms which I will need to deal with.

My Mk4 Golf had many faults but even at 10+ years old it didn't suffer any rust problems on critical parts.

Only difference is you can get a full new suspension for a mk4 for £400 to sort it if it did.
Title: Re: Attention - New Rust Point - Front Arches Chassis
Post by: clubsport on 23 March 2024, 13:49
There is a Volkswizard video that covers potential rust issues on the Mark 7; https://www.youtube.com/watch?v=PxLU0b5fL5k

I did mine last summer on a very hot day, so that it was easy to spray the rust proofer.