A6 / S6 (C5 Platform) Discussion Discussion forum for the C5 Audi A6 and S6 produced from 1998-2004
Sponsored by:
Sponsored by:

Old 08-15-2016, 12:45 PM
How-Tos on this Topic
Last edit by: IB Advertising
See related guides and technical advice from our community experts:Browse all: Audi A6 (C5) Cooling System Guides
Print Wikipost


Thread Tools Search this Thread
Old 02-23-2010, 06:01 PM   #1
AudiWorld Newcomer
Thread Starter
Join Date: Feb 2010
Posts: 1

can some one please tell me where are the bleeding points ARE for the coolant system i removed all the coolant but need help with finding the bleeding points i have a 1999 audi A6 quattro wagon v6 2.8L
sugadaddy12 is offline   Reply With Quote
Old 02-24-2010, 09:54 AM   #2
Chief Cook and Bottle Washer
Kris Hansen's Avatar
Join Date: Oct 1998
Posts: 66,550,180

The most important bleeding point is the hose that leads to the heater core. Pull back the covering from those hoses, and find the hose that has a small hole pre-formed in it. Loosen the clamp and slide that hose off of the barb enough to cause the hole to clear the barb.

With the engine OFF, and COLD, start filling the coolant. stop filling when the tank is full, let it settle, refill. sometimes it helps to remove the screws that hold the tank to the car, and hold it up as high as the hoses will let it. Keep doing this till you get a steady flow out of the bleed hole. Slide the hose back on, and let the coolant settle some more. Once the level remains constant in the tank, start the engine, and let it come up to temps. Make sure to have the heat on full hot. give the engine a few runs up in the revs, and shut it off, let it sit.

Top up the coolant as needed.
Kris Hansen is offline   Reply With Quote
Old 02-24-2010, 01:23 PM   #3
AudiWorld Member
01A6Turbo's Avatar
Join Date: Jul 2009
Posts: 126

STFA - there are a thousand threads on coolant flushes.

But just to add to Kris' comment - yes the most important bleeder is the heater core located just to the right of the battery under the rain catch panel. (Remove rubber strip, pull panel towards front of car to remove.) Your outlet hose will have the bleeder hole (you'll see in the hose a little tiny hole that is surrounded by white) - after unclamping the hose, pull it back (twds front of car) until it is JUST off of the "pipe", of the core, so to speak.

I'm not sure about the 2.8L but my 2.7L also has another bleeder hole in the coolant pipe just to the right and below the TBB in front of the mani. It's a 5mm Hex I believe. Bentley states there is another bleeder on the return line just under the expansion tank on the 2.8's. This one is to be bled before the one by the TBB. (Go in order - Heater Core --> Reservoir Return Line --> TBB). My 2.7 doesn't have the return line/inlet one, or at least I never found it - so what I do is just d/c the inlet hose from the tank until I get a steady flow of coolant, then reconnect inlet to tank. I strongly suggest doing a better STFA or buying a bentley repair manual before attempting another job like this without proper instructions though...

Hope this helps!
01A6Turbo is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
EPC Light on... Coolant Leak ... ECM needs Replacing Audifastdaddy A8 / S8 (D4 Platform) Discussion 10 07-07-2016 04:43 PM
Coolant temperature sensor 97 audi cabriolet location and replace 9552T500 Audi 90 / 80 / Coupe quattro / Cabriolet 3 09-08-2015 05:41 AM
Clutch is not fully disengaging RTnDL A6 / S6 (C5 Platform) Discussion 0 09-07-2015 11:17 AM
:: ECS Tuning :: B6/B7 S4 ECS Assembled Heater Core Refresh Kit ECS Tuning-Audi S4 (B6 & B7 Platforms) Discussion 0 09-03-2015 12:45 PM
:: ECS Tuning :: NEW!! B7 A4 2.0T ECS Baffled Oil Catch Can ECS Tuning-Audi A4 (B7 Platform) Discussion 0 09-01-2015 09:16 AM

18t, 1998, 1999, 28l, a4, a6, ag, audi, audivw, audiworld, avant, bleed, bleeding, coolant, cooling, quattro, system

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

All times are GMT -8. The time now is 12:44 PM.

  • Ask a Question
    Get answers from community experts
What's your question?