Member Since: 24 Nov 2023
Location: edinburgh
Posts: 12
Underbody Rust
Click image to enlarge
Hi folks.
I've been doing some work on my sills after removing the tree sliders on my D4.
The outer sills were pretty rotten so I've welded in new metal.
The car also needs discs, pads and I think the compressor rebuilt. Before i spend more on it, I could do with a view on whether the chassis has too much rust or not?
Essentially, if it's a wire brush and lanoguard, I'll get it done at the end of summer but if it's worse than that, I'll likely get rid.
What do you guys reckon? (Photos attached).
Click image to enlarge
Click image to enlarge
3rd Jun 2024 10:18 am
disco chris
Member Since: 25 Apr 2022
Location: London
Posts: 277
As far as I'm aware the chassis on the D3/4 are pretty chunky and what you see there is probably surface.... apart from the sills and maybe another weak spot around the rear driveshafts, not likely to have proper issues with many other bits?
Although I may well be corrected by someone more knowledgeable!
3rd Jun 2024 12:43 pm
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 5034
In addition to what disco chris has already said re the chassis and rear drive shaft housings. A closer look is needed at the rear crossmembers, gussets, inner sills, and general underbody. There looks to be at least some heavy body corrosion given the condition of the area in the N/S/R wheel arch where the brake pipe is held.
It might be serviceable but the body steel is nowhere near as heavy as the chassis in these areas. To assess properly you you need get under it with a sharp screwdriver and see if you can pierce through the rust. Spare wheel removal will make it easier to access the rear/boot floor/EPB mount/crossmember etc.
Check also the condition rear disc backplates as they're no small job to replace.
Unless all the rust is removed properly it will be a waste of time and money, but either way it's gonna be a very dirty job for somebody. yµ (idµ - eAµ) ψ=mψ
3rd Jun 2024 1:23 pm
kris83
Member Since: 24 Nov 2023
Location: edinburgh
Posts: 12
Thanks guys. The inner sills are OK, I've had a good look when I've had bits of the outers cut off.
I'll have a poke around with a screwdriver and hope for the best!
3rd Jun 2024 2:14 pm
Cresco750
Member Since: 20 Sep 2016
Location: Auckland, NZ
Posts: 49
Is that the result of driving on salted roads? (Asking from a non-salted part of the world).2016 LR4 3.0 SDV6 HSE
SOLD: 2005 LR3 2.7 TDV6 HSE
3rd Jun 2024 9:41 pm
kris83
Member Since: 24 Nov 2023
Location: edinburgh
Posts: 12
I think so. Looking at the car's history, it's spent quite a while in the north east of England and Scotland. (Or down a salt mine, or possibly in the sea)
3rd Jun 2024 9:45 pm
itsaguything
Member Since: 20 Dec 2023
Location: Manotick, On
Posts: 245
I’ve spent some time researching how to deal with the rust issue.
In the end I’ve decided to proceed with a 3 step process:
1. clean/wire brush off the loose rust
2. apply a rust converter
3. optionally paint, if preferred.
4. apply lanolin or equivalent (I opted for Corrosion Free, as it passes the military standards)
fwiw2015 LR4 HSE Lux Aintree Green
2013 LR2 HSE Radiance Red
2007 XKR Jaguar Racing Green
2005 XJR Jaguar Racing Green
2002 S-Type R British Racing Green
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