Another special tool required

[Yogioes]

So, lockdown boredom.
There is a little black screw holding on a black plastic cover on the top of my Discovery. I assume this is the aerial.
One of the screws is rusty (as you would expect on a 4 year old car!!!).
It's hard to see but irritating nonetheless and a lot easier to meddle with than all the corrosion underneath.
Or so I thought.
I decided to remove it and see if I had a suitable replacement.
At a quick glance I could see that it was a star with a pin up the middle.
No problem as I had previously bought a security bit set.




I tried several which looked like the correct size but none dropped into the hole.
Hmmm?

Is the hole in the tool too wee for the pin in the screw?
I don't fancy my chances of drilling it bigger as these tools should be quite hard.

After a closer look without my glasses and applying of my O Level arithmetic I realised that my tools are all six pointed and the screw on the car is five pointed.

DOH! - Another special tool required.




Plan B
I think I'll attempt to treat the rust in situ and dab some black paint on it.

[tight fart]

5 sided torx with pin, vw use them quite a bit.

[tight fart]

[Chris32345]

Small flatebalde screwdriver in the middle and gives twist will often snap the middle pin so you can use a normal torx

[normalbloke]

Chris32345 said:

Small flatebalde screwdriver in the middle and gives twist will often snap the middle pin so you can use a normal torx

But it’s not a normal torx ,even with the pin removed...

[Baldchap]

This looks like a match (£22):
https://www.amazon.co.uk/Laser-5031-Torx-Plus-Piec...

[Yogioes]

Thank you, that looks perfect for the job.
Not sure I can justify any more tools. I already have lots of tools bought for single jobs ...... but as we all know, you can't have too many!

[Turn7]

Torx anti tamper screw - its the Manufacturers way of saying "dont fk with this..."

[paintman]

Discovery 4?

LRcat gives part number XYP500240.
http://new.lrcat.com/#!/12728/53806/54449/4305/544...

Brit-cars website (might be slow to load) says M5x14mm.
https://www.brit-car.co.uk/product.php/170362/5497..._discovery_3_4_

Replace with something stainless steel?

[Yogioes]

paintman - thank you for that info. Very informative.
It is a Disco 4 with part no 18A984A

I was thinking that I would replace the screws with one from my assorted stainless steel collection.

But, while I originally dismissed Turn7's comment, on looking at the diagram it's not clear what it screws into.
The other option appears to be fitted with a nut from underneath while mine appears to have a mounting bracket with captive threads.

I will need to have a better look to ensure that I can get to that without stripping off the interior trim or worse, have it rattling around the roof somewhere.

It seemed like a good idea.......

[tapkaJohnD]

https://www.ebay.co.uk/itm/Five-5-Sided-Tamperproo...i0AAOSwo6lWOxVM

[thebraketester]

Use a centre punch and a hammer to spin the screw out...

[Drive it fix it repeat]

Use an angle grinder and remove the car from the screw. Got to think clever in these circumstances.

[Yogioes]

So, to bring this to it's conclusion.
I bought the 5 pointed torx bits and had a go at removing the offending rusty screw.
However, it appeared to be lifting the top plastic cover with it and the thread that I could see exposed below looked bigger than it should have been. I suspect it was the part that the screw was screwed into.

At this point I chickened out and tightened it back in.

Sanded it as best I could with limited access, treated it to some Hydrate 80 and painted it with some matt black enamel.

It'll have to do.

Thanks for the hints and tips

[Boosted LS1]

Drive it fix it repeat said:

Use an angle grinder and remove the car from the screw. Got to think clever in these circumstances.

Part 2.. Weld a new car back in after removing it's torx :-)