A8 Parts Forum  

Go Back   A8 Parts Forum > A8 D2 > D2 - Interior

D2 - Interior Seats, dashboards, plastics, ventilation everything inside the cabin

Reply
 
Thread Tools Display Modes
  #11  
Old 11th November 2018, 01:49 PM
Nognar Nognar is offline
Senior Member
 
Join Date: Jul 2017
Posts: 244
Default

Long drive in the car today and I have heat out the vents

Flushing both matrixes means they are now clean, unblocked and importantly balanced so not upsetting the system. New G150 is working as it should also.

Heat out of both side vents as expected and the climate makes the cabin warm as expected when 22c or 24c and cools it correctly when I set to 20c.

So that's another job ticked of the list on the A8.

I must admit the 2.8 is far from fast but its a comfy cruiser and well suited to the recent poor weather we have been having.
__________________
--
2001 Audi A2 1.4 SE - Jaipur Red Pearl
2002 Audi D2 4.2 S8 - Ming Blue Pearl
2002 Audi D2 2.8 A8 QS - Audi Silver
--
Reply With Quote
  #12  
Old 11th November 2018, 10:32 PM
MikkiJayne MikkiJayne is offline
Senior Member
 
Join Date: Jan 2012
Posts: 5,017
Default

Glad yours is working. The HVAC is now completely and spontaneously broken in both my working D2s

Big Red used to work absolutely fine in the summer. Now she has no temperature control whatsoever. Max heat from the side and lower dash vents and no heat at all from the centre vent and the windscreen. No response at all to the temperature settings or the control in the centre vent. Set the cabin temperature manually by adjusting combinations of vents.

The S8, already having max heat from the right hand dash and lower vents, now also has almost no air coming through. The blower is working and makes a lot of wind noise on full chat, but barely a draught out of any of the vents regardless of setting.

Most frustrating.
Reply With Quote
  #13  
Old 11th November 2018, 10:34 PM
HPsauce HPsauce is offline
Senior Member
 
Join Date: Sep 2011
Location: Chilterns, almost over HS2!
Posts: 8,366
Default

A challenge to your IT and diagnostic skills?
__________________
2003 D2 FL S8. Irish Green Pearl/Beige. Solar sunroof, auto-dim mirrors, electric rear seat functions, ski hatch retrofit; extended leather. Aftermarket DVB-T, reversing camera and full XCarlink (Bluetooth etc.).
2016 Volvo V40 T5 Cross Country (4WD) with ALL the toys including adaptive cruise etc. etc. Osmium Grey with Blonde/Charcoal leather interior. Polestar performance "optimisation". (A much rarer model than a D2 S8 by the way!) Oh, and a brand new engine at just under 30,000 miles on the factory one!
Finally: gone, but not forgotten.....
1998 D2 PF S8. AgateGrey/Platinum. Every option (I think) except electric rear seats, tiptronic steering wheel, ski hatch, towbar & dimming door mirrors.
e.g. Cruise control, NavPlus/TV, Bose, GSM, Xenons, Solar roof, Parking sensors, Alcantara/leather everywhere of course. (internal dimming mirror added later)
1998 (very early) Ford Focus 1.8 Zetec; ABS/TCS, Heated screen/mirrors, Aircon, Auto-dim mirror, Leather, Trip computer, Cruise control, OEM Ford SatNav with CD changer.
And before that a lot of Rover 800s, a few oddities, a lovely Triumph Dolomite 1850HL with Overdrive and way back in my schooldays an Austin Seven aka Mini 850!
Reply With Quote
  #14  
Old 11th November 2018, 10:54 PM
Nognar Nognar is offline
Senior Member
 
Join Date: Jul 2017
Posts: 244
Default

I have put a huge amount of time into working out the HVAC system and going through it with VAGCOM.

It’s damn complex and frustrating but over the past four weekends I have got a better understanding of it now.

My S8 shows me the same readings across all the measuring blocks as the A8 and appears that it should be working.

Though my S8 also blows hot for no apparent reason out the right side vent which I control the temp by turning the vent open or closed!

That’s a task for another day
__________________
--
2001 Audi A2 1.4 SE - Jaipur Red Pearl
2002 Audi D2 4.2 S8 - Ming Blue Pearl
2002 Audi D2 2.8 A8 QS - Audi Silver
--
Reply With Quote
  #15  
Old 11th November 2018, 11:05 PM
MikkiJayne MikkiJayne is offline
Senior Member
 
Join Date: Jan 2012
Posts: 5,017
Default

One hot side I think is the valve block stuck open. I had both sides hot until I swapped the block, now the passenger side works properly but the driver's side is still hot.

Since you've studied it, do you have any ideas on the lack of airflow or lack of temperature control?
Reply With Quote
  #16  
Old 12th November 2018, 07:17 PM
Nognar Nognar is offline
Senior Member
 
Join Date: Jul 2017
Posts: 244
Default

Its the next project is the S8 heating as right now I am not sure why one side is hot and not the other.

Its either going to be mechanical (Motors/ Flaps) or the HVAC system thinks it needs to put heat out there.

One thing I did do on the A8 which I will do on the S8 is even though the VAGCOM basic settings told me the flaps were moving was to do a basic check. Hence I pulled the head unit out and used a sharpie to mark the white round plastic wheels on the motor flaps so I could actually see them move.

All was OK, I just did not 100% trust the VAGCOM readings.
__________________
--
2001 Audi A2 1.4 SE - Jaipur Red Pearl
2002 Audi D2 4.2 S8 - Ming Blue Pearl
2002 Audi D2 2.8 A8 QS - Audi Silver
--
Reply With Quote
  #17  
Old 19th November 2018, 02:28 PM
awolfinsheepsclothes awolfinsheepsclothes is offline
Senior Member
 
Join Date: Dec 2011
Location: oldham
Posts: 315
Default

My pump has started playing up now! How annoying a quick tap of a ratchet handle restarted it, but I can see me taking it back out to check the brushes and armature. Or maybe just fit a different auxiliary pump in the pipe in a convenient location almost every car now has these fitted now.
While doing a health check I noticed that the thermostat was stuck open a little slowing the warm up. rad getting warm pic 2 and my pipe into the matrix got to 57 degrees quite quickly but the car didn’t reach 90 and I ran out of time. so I’ll have to test that again pic 1 shows pipes at the air bleed outlet is cooler and I’m not sure if the pump was running then so I’ll test again. Use a long screwdriver against your ear(handle end) and the other end on the pump to listen to it.
Dave
Attached Thumbnails
Click image for larger version

Name:	066EA07C-F7DF-41B0-8361-6C5960B27EE5.jpeg
Views:	243
Size:	895.9 KB
ID:	20474   Click image for larger version

Name:	B47DA6E1-774D-40CE-85A8-3DB768A7AE47.jpeg
Views:	232
Size:	865.2 KB
ID:	20475  
__________________

2002 S8 silver with black half leather
2000 d2 S8 in Racing green pearl, RS4 manual gearbox,
2003 A4 avant TDi
1997 Volvo V40 2.0T
1992 Mazda eunos v spec
1976 Reliant Kitten
1965 Porsche 911
Reply With Quote
  #18  
Old 19th November 2018, 03:03 PM
MikkiJayne MikkiJayne is offline
Senior Member
 
Join Date: Jan 2012
Posts: 5,017
Default

You're very lucky if you need a listening stick to hear that pump. I could hear mine over the engine so just disconnected it.

Replacing that whole block of over-complicated misery with something simpler is definitely the way to go.
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 12:20 PM.


Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.