S4 / RS4 (B5 Platform) Discussion Discussion forum for the B5 Audi S4 & RS4 produced from 1998-2002

Recommended coolant and flush procedure?

Thread Tools
 
Search this Thread
 
Old Nov 8, 2009 | 06:55 AM
  #1  
MingsS4's Avatar
Thread Starter
AudiWorld Super User
 
Joined: Jul 2001
Posts: 9,832
Likes: 0
Default Recommended coolant and flush procedure?

Since I'm replacing my Aux Coolant Pump, I figure it's a great time to flush the cooling system and replace with the latest/greatest coolant.

Are there any chemicals/additives recommended to flush the 2.7t cooling system?

What is g12+ and how does it compare to a OAT coolant?

TIA
Reply
Old Nov 8, 2009 | 08:49 AM
  #2  
donromani's Avatar
AudiWorld Senior Member
 
Joined: Apr 2009
Posts: 1,901
Likes: 0
Default

Originally Posted by MingsS4
Since I'm replacing my Aux Coolant Pump, I figure it's a great time to flush the cooling system and replace with the latest/greatest coolant.

Are there any chemicals/additives recommended to flush the 2.7t cooling system?

What is g12+ and how does it compare to a OAT coolant?

TIA
You have to use G12 - do not use any other coolant additive. G12 is a neutral mixture that will not react with any of the sensors and other crap in these cars. If you use regular coolant you can get a buildup of gunk and damage engine components.

You can flush with a normal coolant flush additive from autozone etc. Just follow the instructions on the back (it takes about an hour to flush the system correctly). Then mix the G12 add. with some distilled water (I do a 40/60 g12 to h20 mix for my geo. area and driving habits)
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
ayap
Audi A5 / S5 / RS5 Coupe & Cabrio (B8)
7
Dec 15, 2023 05:27 AM
AutoRacer100
A4 (B8 Platform) Discussion
14
Nov 18, 2020 04:38 PM
MuRaN0Daddy
A4 (B6 Platform) Discussion
8
Oct 3, 2005 09:48 PM
Crisqo09 T.O.
A4 (B5 Platform) Discussion
2
Apr 30, 2003 07:26 AM
errolmorris
A4 (B5 Platform) Discussion
9
Apr 24, 2003 10:23 AM




All times are GMT -8. The time now is 02:58 PM.

story-0
The Highs & Lows of Every Audi C-Class Generation

Slideshow: The highs and lows of every Audi C-Class generation.

By Joe Kucinski | 2026-05-27 16:05:50


VIEW MORE
story-1
Top 10 Most Expensive Audis Ever Sold on Bring-A-Trailer

People were more than happy to shell out big bucks for these cars.

By Brett Foote | 2026-05-27 15:32:23


VIEW MORE
story-2
10 Audi Features & Options We Miss the Most!

Slideshow: 10 Audi features and options we miss the most.

By Joe Kucinski | 2026-05-12 19:33:47


VIEW MORE
story-3
Audi Recreates Crazy-Looking Speed Record Breaker From 1935

Slideshow: Audi has recreated one of the wildest machines of the pre-war speed-record era, reviving a streamlined V16 racer that originally exceeded 200 mph in 1935.

By Verdad Gallardo | 2026-05-11 09:49:34


VIEW MORE
story-4
Coachbuilder Recreates the 1995 Audi TTS Concept

Slideshow: A Dutch coachbuilder has reimagined the original Audi TT by finishing what the 1995 concept only hinted at.

By Verdad Gallardo | 2026-05-05 15:17:58


VIEW MORE
story-5
Every Audi V10 Car Ranked!

Slideshow: Ranking every Audi V10 road car

By Joe Kucinski | 2026-04-29 16:11:56


VIEW MORE
story-6
9 Audi Designs That Aged Like Fine Wine

Slideshow: A look back at the Audis that didn't just survive changing tastes, they quietly outgrew them.

By Verdad Gallardo | 2026-04-28 19:38:27


VIEW MORE
story-7
2026 Audi Q5 Buyer's Guide (Every Model Explained)

One year off a full redesign, the best-selling Q5 is getting a few more updates.

By Brett Foote | 2026-04-17 09:56:19


VIEW MORE
story-8
Ranking Every Current Audi 'S' Model From Worst to First!

Slideshow: Ranking every current Audi 'S' model on sale today from worst to best.

By Joe Kucinski | 2026-04-16 10:28:28


VIEW MORE
story-9
10 Best Audis That are FINALLY LEGAL to Import to the U.S.!

Slideshow: 10 best Audis that are finally legal to import to the U.S.

By Joe Kucinski | 2026-03-24 17:20:08


VIEW MORE