Go Back   AudiWorld Forums > Audi Models > Audi A6 / S6 / RS 6 > A6 / S6 (C5 Platform) Discussion
Sign in using an external account
Register Forgot Password?


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

Welcome to AudiWorld Forums!
Welcome to AudiWorld.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the AudiWorld Forums community today!


Reply
 
 
 
 
LinkBack Thread Tools Search this Thread Display Modes
Old 08-12-2011, 01:47 PM   #1
AudiWorld Newcomer
Account #: 219915
 
Join Date: Aug 2011
Posts: 5
Default Massive Coolant Leak near firewall

I just recently replaced my water pumpback in May due to I had massive amounts of water and coolant leaking from my car. The heads were checked and nothing was warped. The leak stopped for about a month and a half and now the problem is back again. This time, the reservoir will not even hold water at all. With the car completely off, I put the water in the reservoir and whithin a minute, all the water has leaked out. I took it to a master mechanic and he said the water is coming from the back of the block near the heater hose to the firewall. I had all the hoses checked for the radiator, coolant lines and heater hoses. No tears or leaks. He is a master mechanic and does not regularly work on Audi's. He could not tell me what the part was called, so I am inclined to take whatever he says as BS. What could this be? I have been reading a lot about auxillary water pumps, j plugs, and compression rings. Someone please help!
jensen_jenniferl is offline   Reply With Quote
Old 08-12-2011, 01:51 PM   #2
AudiWorld Member
Account #: 171699
 
tester123's Avatar
 
Join Date: Oct 2009
Posts: 509
Default

Quote:
he said the water is coming from the back of the block near the heater hose to the firewall
Can you visually locate where the water leak is?

Also, What model/year?
__________________
ʘ˥ Pearl White А6 Ч.2ℓ Quattro
Sport, cold, everything -Nav.
▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫
No more OIL or COOLANT leaks! │ T-Belt, Water pump & Valve Covers DONE! │ Trans & Diff Fluid DONE! │ Bearing & Inner Tie-rod Next │ Steering leaks?
Fuel Banks 1 & 2 Lean issue fixed (finally!)
Rebuild Bosch 150 Amp Alternator (save major $$$)

Last edited by tester123; 08-12-2011 at 01:54 PM.
tester123 is offline   Reply With Quote
Old 08-12-2011, 01:53 PM   #3
AudiWorld Newcomer
Account #: 219915
 
Join Date: Aug 2011
Posts: 5
Default

2001 Audi A6 Quattro 2.7T
jensen_jenniferl is offline   Reply With Quote
Old 08-12-2011, 01:58 PM   #4
AudiWorld Newcomer
Account #: 219915
 
Join Date: Aug 2011
Posts: 5
Default

[QUOTE=tester123;24182744]Can you visually locate where the water leak is?

The mechanic said he could visually see where the water was coming from the end of the heater hose off the back of the block to the firewall. He also had my car torn apart though.
jensen_jenniferl is offline   Reply With Quote
Old 08-12-2011, 03:02 PM   #5
AudiWorld Senior Member
Account #: 196934
 
Join Date: Dec 2010
Posts: 757
Default

Probably the black cross pipe on the back of the engine that goes between the two heads. Sealed with O rings on either end. One is probably leaking and badly by the sounds of it. $.25 O ring, but absolute PITA to get to.
__________________
'99 A4 2.8 Tip Quattro
'03 Allroad 2.7t Tip (Gen I's + Bilstein's)
'87 Toyota FJ60 LandCruiser
5v/cyl is offline   Reply With Quote
Old 08-12-2011, 06:08 PM   #6
Tech Guru
Account #: 43812
 
4Driver4's Avatar
 
Join Date: Oct 2002
Posts: 33,256
Default

If it's a massive leak, why is it so difficult to find?
Given that we can only guess, my guess is aux water pump.
__________________
4Driver4

Growing old is mandatory; growing up is optional.

2005 A6 Sedan Q 3.2 (wife's whip)
2000 A4 Avant Q 2.8 (daily driver)
1980 VW Scirocco (mid-life crisis car)
1983 Mazda RX-7 (revolutionary sports car)
2003 Mini Cooper S (just because)
1995 Mazda Miata, Superdupercharged(anti-Audi)
1999 Mazda Miata SSB (track beotch, no plate)
2003 GMC Yukon Denali XL (the anti-earth)
2004 Dodge Dakota (hey, at least it's stick and 4x4)
4Driver4 is offline   Reply With Quote
Old 08-13-2011, 12:12 PM   #7
AudiWorld Senior Member
Account #: 158737
 
Join Date: Feb 2009
Posts: 1,041
Default

Have you checked the rubber hose going from the resevoir to the coolant line in the back of the heads? This hose has braiding over it and that could make it difficult to spot a leak. What about the resevoir itself, as they are known to crack?

Like 4D4 said, if it's that big, it should be pretty easy to locate. I'd unscrew the resevoir, flip it over, look at it, and look at the hoses going to the back of the engine. Then I'd look at the coolant pipe to the back of the heads.

But as 4D4 said, since we can only guess...it could be almost anything.
jseklund is offline   Reply With Quote
Old 08-13-2011, 09:27 PM   #8
AudiWorld Member
Account #: 171699
 
tester123's Avatar
 
Join Date: Oct 2009
Posts: 509
Default

Just from the common sense angle, my thoughts are leading towards an obvious ruptured hose/fitting. Having said that, it can be difficult at times to find out exact origins of the leak. It is somewhat difficult to find a small leak but, if you are emptying out the tank quickly, things should not be that difficult to trace it. Trace the coolant hoses / route through the diagram and isolate the area. I know, sounds easy typing behind a screen but, that's what really going to help. It's not easy for any of us to pinpoint the leak over the forums as you can understand. Hope you find it quickly.
__________________
ʘ˥ Pearl White А6 Ч.2ℓ Quattro
Sport, cold, everything -Nav.
▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫▫
No more OIL or COOLANT leaks! │ T-Belt, Water pump & Valve Covers DONE! │ Trans & Diff Fluid DONE! │ Bearing & Inner Tie-rod Next │ Steering leaks?
Fuel Banks 1 & 2 Lean issue fixed (finally!)
Rebuild Bosch 150 Amp Alternator (save major $$$)
tester123 is offline   Reply With Quote
Old 08-14-2011, 02:04 AM   #9
AudiWorld Member
Account #: 191790
 
bigdadi's Avatar
 
Join Date: Sep 2010
Location: Boston, MA USA
Posts: 368
Default

Put some colorful or something flourecant can be identified by ultra violet light.
__________________

12 A4 2.0T Quat(In 4/25/12)
02 A6 Avant 3.0 Quat(Out 4/24/12)
07 Outback 2.5i Ltd(Sold 5/4/12)
bigdadi is offline   Reply With Quote
Old 08-14-2011, 04:34 PM   #10
AudiWorld Super User
Account #: 44417
 
SloopJohnB@mac.com's Avatar
 
Join Date: Oct 2002
Posts: 5,546
Default

Yeah..that's the ticket with a massive coolant dump...Not.

Just find the ruptured hose or loose/broken fitting.
SloopJohnB@mac.com is offline   Reply With Quote
Old 08-14-2011, 04:34 PM
AudiWorld
Audi R8




Paid Advertisement
 
 
 
Reply

Tags
2001, audi, auxiliary, coolant, fire, firewall, leak, leaking, loss, massive, pump, s4, tacoma, wall, water


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 On
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -8. The time now is 05:05 AM.


Copyright 2014 AudiWorld.com Audi Enthusiast Community