Simon, your channel is better than the user manual for the Defender ... many thanks.

My Mrs works in a similar way, but I have to put her into "Wine" mode.

This car is just fantastic. Thanks for letting us know about this - I’ve added a note on my phone...

If the rad matrix is covered in mud, ideally it should be washed out from the fan side. I've seen some rads that superficially looked clean but the fins were actually hard packed deep into the core with dried dirt. This severely hampered engine cooling, intercooler and transmission cooling and, depending on the layering of radiators, the complete failure of the air conditioning as well.

I just tried this on mine and it doesn’t make the “boop, boop, boooop” noise as the flaps open. Perhaps that’s a configurable setting. Awesome find 👍 well done.

Simon you're a genius! Love all these info and secrets. Thank you for all these defender videos. I recently got one and want to know everything about them. I'm a DIY person and love growing my knowledge.

Honestly you deserve a bloody medal ! Also never sniggered so much through your video (with the continued description of said movable fins. 😂)

great find Simon. 😀👍

Good info as usual. Never had that on my 08 Defender😂 Too much nonsense that could go wrong. Thermostat should take care of warm up and engine temperature.

Absolutely fantastic..now how do we clean the bottom one 😂

Good work again Simon. This idea of washing the radiator from the back made me think of my underbody lance that I use for power washing the underside free of salt etc. It is a cranked steel tube with fan spray nozzle that connect to the Lance on my Nilfisk washer. I wonder if something similar but used at much lower power could work from the engine side. It is perfect for mud and salt anyway! Another thing for you to invent!! 😃😃😃Richard.

Another excellent video! 👍🏻

Hiya this just an observation and experience from cleaning mud plastered motorcross bikes Surely the direction of jetting water needs to be from engine side out to the front through the back of the rad. Jetting from the front is going to force / push stones and all the crap deeper into the fins.

Thank you! Have confirmed, also works on L462 Discovery 5 👍🏻

Just replaced my green D240 with a white D250 so will need all the cleaning tips!

This is getting exciting, what will the next secret mode be that you find I wonder?

Regarding maintenance, do you have any insight on changing the oil and resetting oil change reminder if applicable? Your reviews on this vehicle has been so much help, more than my dealer! Thanks.

Great finding ! Which other LR models are equipped with this system ?

man！！！you are god of land rover. thanks for teach it. and also i changed all my rangerover back trim. it was easy~~~ thanks for all your video.

I've been following your videos 👍I tried it yesterday after three years and it was great. (I'd like to know one more question. Navigation Connected Services Licence Expiring) （ONLINE PACK Subscription expired） What should I do in China。

Many thanks for your recent radiator wash tip! This was going to be my next truck but, because of that, I am now going to trade my Disco 5 in for something else - any suggestions, seriously! I've gone back to using my 1985 90 despite the noise and lack of heating........

Heres a thing...when engine is cold the thermostat is not sending water to radiator so no need to shut flaps to help engine heat up quicker. however I get for drag and wading reasons why its there. :)

Absolutely brilliant 🤩

Hi 🙋‍♂️ I think 🤔 if you don’t mind you can make one ☝️ more separate video for Land Rover like Hidden features. But you always make great 😊 video no doubt. Thanks 🙏

Good find, would it be the same for a 2020 disco sport I wonder?

Simon, would you be able to comment on the issue of the jet engine like roar coming from the operation of the cooling fan in the radiator of my 2024 Defender 110 2.0L 4 Cylinder Turbo? Runs for 1-3 minutes after engine shut off every time, extremely loud. I assume this is normal, just cooling down the turbo, but I have never heard anything like this on any vehicle. Forums and dealership seem to think this is "probably" normal, but nobody seems to know for sure. Thanks!

Great work

Does it work the opposite way, for example wading?

It used to called a "radiator blind". I suggest that the term is resurrected.

Great tip, hope it works on spinifex

Do the flaps close in wade mode?

does it work with other LR vehicles?

Seems way more complicated than it needs to be. There’s way to many electrics on these now not disputing they are a great car but I do very much question the reliability and being able to fix them easily anywhere has gone. Cant see many farmers or contractors buying them as Commercials as much as I do think it’s a step forward I do feel landrover have missed what made the defender great

Just wondering if there is a temporary mode to close these vanes for a short period of time if you are wading and don't want to flood engine bay?

Am I missing something with this demonstration! How can you show the flaps working opening & closing still fitted on the Defender when you have removed it to fit the winch? 🤔

Do you guys think its possible to retrofit heads up display on earlier L494 models? Could be a good video idea

third try... it seems my comment is removed ? Hi Simon! Apropos "secret features", do you know maybe how to activate manually the "EXTENDED MODE" height? (it seems I cannot type a reference URL to my comment ??)

Would it be more easy, intuitive and simple to add a mode “cleaning” ? Sometimes it get highly complicated for no reasons!

That’s not the reason for the flaps. They close to improve the aero efficiency.

Shouldn't it close in wading mode to stop this happening in the first place? If not they might be able to add that.

While I'm in a whiney frame of mind, what I really don't like on off-road or rough road vehicles is the habit of siting intercoolers down low in front of the front wheels, with vents or slats allowing warmed air out through the wheel arch liner. Firstly the intercoolers get covered in rubbish because they are low down [on some V engines there is one on each side], but the worse thing is that the sh1t that is thrown off the tyres sticks to the wheel arch liners and blocks the air exit slots. Power hosing inevitably washes muck into the cavity, filling behind the intercooler and in front of the wheelarch and ultimately adding a surprising amount of weight and limiting the cooling. Hope LR don't have any kind of radiator in that silly position like I had on a Q7 and, on one side, the Honda. The best solution for a Defender is an air-to-water intercooler positioned in the engine bay, but I don't know what LR have done Rant over.

I'd call them louvers.

My god, yet another peice of nonsense added that land rover can't even be botherd to tell you exists, or maybe they don't know it's there either, do they not fit thermostats in their vehicle's anymore?.every time they sell one instead of supplying an owners manual they should just give them a feature length video that you guy's have made because its by far more informative and accurate than anything the dealership or land rover could be botherd to supply a new customer,

I would just take those flaps off. Seems stupid in the first place.

It's not a new thing All im gonna say is Peterbilt 281 1954. I understand it's a feature but with how land rover are now it will brake the new Defender if you can even call it that is not a Defender it's not got a modular like the old one had so they took away the motor that the services use. Like BT needing to go over fields with the boom lift on the back, The water board, The power line people they all use the proper land rover Defender. Thats just a peace crap and only belongs with the other land rovers of today in the city's and towns driven by people who don't need them and then complain about the global warming and the price hike in the city's for the emissions zone.

Secret unless you read the manual...

Another reason to dislike this car, great vid though. What a complicated wash process just for a radiator and if I take my keys no radiator wash

Yet another feature not fit for purpose in a true off roader...awful

another excellent video - but I am pretty sure these new "Defenders" aren't made to go off road

Who the fuck is he looking at