RS Model Line Audi RS4 and Audi RS6..Pure race-car performance technology applied to the comfortable ride for which Audi is known

2003 RS6 Radiator

Old 06-22-2016, 10:02 PM
1st Gear
Thread Starter
Join Date: Oct 2009
Posts: 6
Default 2003 RS6 Radiator

Hey out there. I bought a crashed RS6 and it needed a radiator. I bought one but it isn't an exact fit ($165). I eventually found an OEM but its around $1000. Here's the issue: there's a coolant hose that connects to an aluminum 'tube' on the lower side of the radiator, driver's side. The cheaper radiator does not have this 'tube'. There is nowhere to attach the coolant hose. Instead of buying a $1000 radiator, can't I 'tee' off from a different coolant line and connect to it. I've attached some pictures. I don't know what the plastic piece is from which the coolant line attaches. Its NOT the coolant overflow tank.
Attached Thumbnails 2003 RS6 Radiator-p1050877.jpg   2003 RS6 Radiator-radiator1..jpg  
Old 08-16-2017, 06:05 PM
1st Gear
Join Date: Apr 2005
Posts: 35

Assuming this has since been sorted out? Since there's no reply or follow up....

The plastic hose fitting is a thermostatic coolant valve. It goes to the radiator and engine. I believe the coolant is contained in the ATF cooler (radiator) with flowed controlled by the valve when needed. The open port shown goes to the transmission, there is an upper port not shown. The front mount oil cooler also cools ATF and engine oil.

The concern in changing anything could lead to the transmission overheating. Quickly.

With that said, it just may be a ATF pre-heat function. I'd have to dig into my tech files and look at my RS6 closer.
Related Topics
Thread Starter
Last Post
The BHP Project
Off Topic
03-03-2014 07:20 PM
Misc Items for Sale
03-28-2009 07:16 PM
Want to Buy
01-29-2009 04:58 PM
Audi A6
08-30-2007 03:13 PM
Off Topic
12-30-2004 04:42 AM

Thread Tools
Search this Thread
Quick Reply: 2003 RS6 Radiator

Featured Sponsors

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to and affiliated sites.