markdotreed wrote:

Tempted Geoff?


https://www.autotrader.co.uk/car-details/2...amp;page=1

Vogue wrote:

She hasn’t been in the sea at anytime has she ? Boat launching or a splash through salt water ? I have seen corrosion like this before on a friends RR Sport used for launching a jet ski

That's Not good

“Thankfully, it's the only one we've seen like that, but we have seen corrosion build up on quite a few cars now...”

Mikey, are there specific areas you’re seeing this, aside the rear subframe mounts you’ve already highlighted? would be good to know where to check & hopefully catch before it becomes an issue

I had hoped to leave corrosion problems behind when moving from my L322 to an all aluminium bodied L405

As chance would have it, we had a 2015 in today for a service...

Click image to enlarge

That’s not a good sign! 2002 4.6 Vogue SE - Alveston Red with Lightstone Leather
2012 Range Rover 5.0 SC Autobiography in Indus Silver with Jet/Ivory Interior
2012 Range Rover 4.4 TDV8 Autobiography in Baltic Blue with Sand Interior
2013 Range Rover Sport SDV6 HSE Black Edition in Santorini Black with Ebony Interior

Another yesterday. 63 reg. Not good...

Click image to enlarge

Click image to enlarge

Quote:

Being aluminium, I don't know how to even begin repairing that. And the floor pan is bonded together, not welded.

I tried many years (25 years lol) to stick weld aluminium, with aluminium rods, it's like welding butter lol without any warning if it gets just slightly too hot it collapses into a molten mess. It can be done nowadays with TIG/MIG or plasma but never tried that lol.
Some interesting info here, not a project for DIY

https://www.uti.edu/blog/welding/aluminum-welding 2018 SE SDV8 4.4 Byron Blue

Was that a car that had spent most of its life in Scotland, Mikey?

I keep looking at 405’s to replace my SC at the moment but this puts me off as it’s a much more specialised repair then the steel 322’s if they need welding.

David. 2002 4.6 Vogue SE - Alveston Red with Lightstone Leather
2012 Range Rover 5.0 SC Autobiography in Indus Silver with Jet/Ivory Interior
2012 Range Rover 4.4 TDV8 Autobiography in Baltic Blue with Sand Interior
2013 Range Rover Sport SDV6 HSE Black Edition in Santorini Black with Ebony Interior

Mikey wrote:

Another yesterday. 63 reg. Not good...

Click image to enlarge

Click image to enlarge

Nope not good at all, the rest of the car just rusted into thin air  Filters are in fact so good that in certain circumstances, when the ambient air is already polluted, a diesel car will tend to extract more particles from the air than it emits. Emissions Analytics worked with........etc etc

He who dies with the most toys wins...

dhallworth wrote:

Was that a car that had spent most of its life in Scotland, Mikey?

I keep looking at 405’s to replace my SC at the moment but this puts me off as it’s a much more specialised repair then the steel 322’s if they need welding.

David.

It looks like JLR depend on both surfaces having a protective film to prevent Galvanic action, even the fastenings are coated.

I would have thought from Mike's photo's, JLR would have fitted some sort of insulated gasket/spacer etc with insulated sleeve bolts during the build. Relying on a few microns of protective paint etc is totally not good Engineering practice. Just 1 scratch during installation and the barrier has gone!

I found below files in the WSM which may be of interest for anyone who goes down a weld repair it shows weld procedure and grades of Aluminium used (filler wire). The approved MIG welder uses Direct Current, (DC) and does not produce High Frequency, (HF), at start up, (initial arc).

Corrosion prevention
https://www.fullfatrr.com/gallery/albums/u...ENTION.pdf

Body Construction and welding techniques
https://www.fullfatrr.com/gallery/albums/u...UCTION.pdf 2018 SE SDV8 4.4 Byron Blue