![]() | Home > Technical (L405) > Rear seats air vent. heating - 4 sone system - cold air… |
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fisha Member Since: 25 Sep 2009 Location: Scotland Posts: 1450 ![]() ![]() |
There is a rear A/C unit in the left hand side of the boot as you stand at the tailgate looking in. It supplies air to the face vents in the roof next to the interior lights and the vents at the edges of the rear seat base area.
I split the connection and capped both metal pipes with my short pipes which left the 2 rubber hose pipes that ran to the rear free.
I then used a garden hose with another piece of copper pipe and inserted it into 1 the rubber hoses on the rear loop.
Turned on the hose, and flushed through the rear loop until no air was coming out and it was clear water. Then with a low flow on the garden hose feed, I then re-made the connection with the hose the water was coming out of ... which then started filling up the whole system, and then I quickly disconnected the garden hose and remade the second connection. It was messy and wet, and was a case of putting my thumbs over the ends of hoses and pipes to hold water in, but it worked well. With it all connected back up, I completed the re-fill / bleed procedure fine. - - - - - - I don't know why exactly the workshop procedure didn't work properly ... I suspect there was just not enough flow or pressure getting pushed along the pipes to purge out the air at the high point. Good luck ! V8 or else ... |
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JLS Member Since: 25 Jan 2016 Location: Oslo Posts: 23 ![]() ![]() |
Thx for a comprehensive explenatioin, fisha. Now I understand the situation. I have a small leaak of coolant, I guess from the coolant inlet to the oil cooler, since I can see coolant drops on the belly pan rear of the engine. I have bought all the gaskets for this job, including oil cooler gasket x 2 for the cooler and the turbo feed pipe.
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fisha Member Since: 25 Sep 2009 Location: Scotland Posts: 1450 ![]() ![]() |
https://drive.google.com/file/d/1aSE85XAUn...jS3Pd/view
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JLS Member Since: 25 Jan 2016 Location: Oslo Posts: 23 ![]() ![]() |
Thx for the Wiki-link. It was the same as I have downloaded before. But, the tip of searching a little bit deeper down in to the different folders was vital! The info isn’t Haynes quality, but sufficient |
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Pugster Member Since: 17 Nov 2024 Location: Hinckley Posts: 11 ![]() ![]() ![]() |
Hi
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JLS Member Since: 25 Jan 2016 Location: Oslo Posts: 23 ![]() ![]() |
Hi Pugster. I’m not an expert on the heating system, but it seems that you have an issue with airduct activators/‘flaps’. This beacuse you have warn air to one side. If you have an air lock in the back, it will result in cold air on both sides, and only effecting the air vents at the grab handles/puddle lights, and the vents where the back seat cussion meets the back rest.
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Pugster Member Since: 17 Nov 2024 Location: Hinckley Posts: 11 ![]() ![]() ![]() |
Thanks JLS funnily enough I got a low coolant light yesterday! I have a minor leak and top it up now and then so that may explain the front!
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JLS Member Since: 25 Jan 2016 Location: Oslo Posts: 23 ![]() ![]() |
Sorry, Pugster, not deeply familiar with with the in depht tech on the warmth distribution on the L405. I would get a fault reader, not the generic one, and see if that will pinpoint any fault air/coolant flap.
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Pugster Member Since: 17 Nov 2024 Location: Hinckley Posts: 11 ![]() ![]() ![]() |
I've got the sdv8 - apparently it's a super common leak around the header tank or something else, a friend (indy specialist) says it a quick enough job I just need to get it up to him.
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JLS Member Since: 25 Jan 2016 Location: Oslo Posts: 23 ![]() ![]() |
Yes, I have the same information: leak is common and ‘easy’ to fix… I’ve bought all the gaskets and sealing rings for both oil cooler and thermostat housing. I just need to find time and energy - just finished changing the rear differential… phuuu! Used 2,5 loooong days, included some rust fixing on steel components.
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Pugster Member Since: 17 Nov 2024 Location: Hinckley Posts: 11 ![]() ![]() ![]() |
God knows what's round the corner!
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JLS Member Since: 25 Jan 2016 Location: Oslo Posts: 23 ![]() ![]() |
He-he… cross fingers…
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Pugster Member Since: 17 Nov 2024 Location: Hinckley Posts: 11 ![]() ![]() ![]() |
Just to say thanks for your help JLS - swapped changeover valve and have heat.
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