The 2.0-liter Audi CAHA 2.0 TDI engine was produced by the German concern from 2008 to 2013 and was installed on many of its popular models, such as the A4 B8, A5 8T, A6 C6 and the Q5 8R crossover. This diesel engine is essentially a more efficient version of the famous CAGA engine.
EA189 family: CAYC, CAAC, CAGA, CAHA, CBAB, CFCA, CFGB, CLCA, CLJA, CKTB, CFHC, CKUB, CDCA, CNEA, CNFA, CNFB, CSHA.
Specifications
| Production years | 2008-2013 |
| Displacement, cc | 1968 |
| Fuel system | Common Rail |
| Power output, hp | 170 |
| Torque output, Nm | 350 |
| Cylinder block | cast iron R4 |
| Block head | aluminum 16v |
| Cylinder bore, mm | 81 |
| Piston stroke, mm | 95.5 |
| Compression ratio | 16.5 |
| Features | DOHC |
| Hydraulic lifters | yes |
| Timing drive | belt |
| Phase regulator | no |
| Turbocharging | VGT |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 4.6 |
| Fuel type | diesel |
| Euro standards | EURO 4/5 |
| Fuel consumption, L/100 km (for Audi A6 2009) — city — highway — combined |
7.5 4.7 5.7 |
| Engine lifespan, km | ~330 000 |
| Weight, kg | 165 |
The engine was installed on:
- Audi A4 B8 (8K) in 2008 – 2011;
- Audi A5 1 (8T) in 2008 – 2011;
- Audi A6 C6 (4F) in 2008 – 2011;
- Audi Q5 1 (8R) in 2008 – 2012;
- Seat Exeo 1 (3R) in 2009 – 2013.
Disadvantages of the Audi CAHA engine
- From low-quality fuel, capricious piezo injectors quickly fail here;
- Diesels before 2009 suffered from a problem with the hex of the oil pump;
- Even in the engine quite often presses oil from under the plastic valve cover;
- According to the factory regulations, the timing belt serves 180,000 km, when it breaks, the valves bend;
- On significant runs, a lot of problems are caused by a particulate filter and an EGR valve.
Frequently asked questions about the Audi CAHA
How much power does the Audi CAHA make?
The Audi CAHA develops 170 hp and 350 Nm of torque.
How much oil does the Audi CAHA take and which one?
Engine oil capacity: 4.6 liters. Recommended oil: 5W-30.
Does the Audi CAHA have a timing belt or chain?
The Audi CAHA uses a timing belt.
Is the Audi CAHA turbocharged?
Yes, the Audi CAHA is turbocharged (VGT).
Does the Audi CAHA need valve clearance adjustment?
No, the Audi CAHA has hydraulic lifters, so the valve clearances do not need to be adjusted.
How long does the Audi CAHA last?
The typical lifespan of the Audi CAHA is ~330 000 km with proper maintenance.
What is the fuel consumption of the Audi CAHA?
Audi A6 2009: city 7.5, highway 4.7, combined 5.7 L/100 km.
What cars was the Audi CAHA installed on?
Audi A4 B8 (8K) in 2008 - 2011; Audi A5 1 (8T) in 2008 - 2011; Audi A6 C6 (4F) in 2008 - 2011; Audi Q5 1 (8R) in 2008 - 2012; Seat Exeo 1 (3R) in 2009 - 2013.
What are the common problems of the Audi CAHA?
From low-quality fuel, capricious piezo injectors quickly fail here. Diesels before 2009 suffered from a problem with the hex of the oil pump. All known problems.
