Vapour in the rocker cover would point to worn piston rings/bores.

Spiral fluted taps are pretty good.

Discovery section. Well worth signing up to the disco3 forum.

Lift pump and injection pump are two different things.

Do your research on the Ingenium 2 litre diesel before buying any small LR product. Google or youtube, loads of info out there.

I think you can relatch it with diagnostic kit?

2001 TD5 I had years ago, the throttle pedal tracks wore out on one side. New to me 2nd hand pedal assy sorted it.

That would actually be quite nice.

On machinery etc yes different colours, but think std colour was always black.

Double press lock button on the fob, this switches off the internal motion sensors. Have had to lock mine this way for years.

Are there really thin seal rings cut into the block or head?

Thread size or spanner size?

I use my rear tow hitch on the 90, now doing the same on the d3 since the sensors packed up.

Fuel pin seized in the injection pump. had it happen on a 200 (same pump) and was as flat as a wet fart! Item B, 5 mins work to get at, only 4 screws to remove.

TD5 might be different but I think the TDI had a purple wire to the rear light clusters that was permanent live worth a look

if I remember correctly the brake pedalswitch has two circuits one for the brake light and second circuit to switch off the cruise.

Crap old pics, but you can see what I did, pics dated 2015 and all still okay. Just wired to a toggle switch under the dashboard. Car runs fine even with the pump switched off, but will lack power on hills until you switch the pump back on. Also makes filter changes and bleeding it a doddle.

I may have replied earlier, but bypassing the mechanical lift pump and fitting a Facet copy one off of ebay works well.

Dont think the threads have anything to do with the union seal, that is on the end of the pipe.

Blocked dpf is the end result of something else failing. All the inactive codes will have a part to play in this. Ps D4 belongs in the discovery section.