What is the problem with the Audi C7 engine?
Excessive oil consumption and leaks are relatively common issues in the Audi A6 C7 2. TDI, especially in older models with higher mileage. Oil leaks can occur at various points in the engine, including the valve cover gasket, oil pan gasket, and turbocharger seals. Oil contamination or insufficient lubrication is the most common cause of turbo failure in the Audi A6 C6 2. TDI. Because the turbo operates at very high speeds, any disruption in its lubrication system can lead to bearing failure or damage to the turbine blades.
How reliable is a C7 engine?
In terms of reliability, the CAT C7 has a solid track record. With a B50 rating of 450,000 to 500,000 miles, half of these engines could be expected to reach half a million miles before requiring a major overhaul. This longevity made it an attractive option for fleet managers looking to maximize their investment. Cat’s C7 engine had a few notable problems, with roughly half of them experiencing engine failures at (or before) 500,000 miles, often requiring an overhaul. However, this failure rate doesn’t differ at all much from a lot of competitor engines produces in the Tier 4 era.