The largest online repair guide library for every car

About us
Contact support
FAQ
Sign up
Sign in

Coolant Leak on my 2017 A6 - Suspect Water Pump?

0

Kevin B. · rep 0 · May 22, 4:31 AM · 1 replies · solved · Question

Vehicle: 2017 Audi A6 3.0T Prestige

Hello everyone,

I've been noticing a faint sweet smell around my 2017 Audi A6 3.0T Prestige recently, and today I found a small puddle of greenish-blue liquid under the front of the car. The coolant reservoir level is also a bit low.

From what I've read online, a failing water pump seems to be a common issue on these 3.0T engines. Has anyone else experienced this with their A6, particularly the 2017 model year? What were the symptoms you noticed?

Is this something I can attempt to diagnose myself, or is it best left to a professional? I'm trying to gauge the severity and cost of this potential repair.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 4:31 AM

0

ClearTheCode admin answer:

Your symptoms – a sweet smell, low coolant, and a puddle under the car – are classic indicators of a coolant leak, and on the Audi 3.0T engine (found in your 2017 A6), the water pump is indeed a very common culprit. These engines are known for their integrated water pump and thermostat housing designs, which can be prone to leaks as they age.

Here's what you need to know:

  1. Common Failure Point: The plastic components within the water pump and thermostat housing assembly can become brittle and crack over time, leading to leaks. The seals can also degrade.
  2. Symptoms: Besides what you've observed, other signs might include: an illuminated low coolant warning light, engine overheating (though less common if the leak is slow), or even a check engine light (CEL) if the leak is significant enough to affect engine temperature regulation (e.g., P2181 - Cooling System Performance).
  3. Diagnosis: While you can visually inspect for drips or residue around the front of the engine, particularly near the supercharger (where the water pump is located), a definitive diagnosis often requires a pressure test of the cooling system. This is best done by a professional.
  4. Repair Complexity: Replacing the water pump on the 3.0T engine is a moderately complex job. It requires removing the supercharger, which involves specialized tools and knowledge. It's generally not recommended as a DIY project for the average home mechanic due to the potential for damaging other components and the need for proper bleeding of the cooling system afterward.

When to See a Shop: Given the complexity and the critical role of the cooling system, it's highly advisable to take your A6 to an Audi specialist or dealership as soon as possible. Driving with a significant coolant leak can lead to engine overheating and severe, costly damage. Prompt repair is essential to prevent further issues.

Menu

Help & account