I don’t have time to post some of the results I have collected. This is the section for the addition of any of the test results people have gotten or seen for the 2003-2009 Audi S4 4.2 chain driven motors.
If anyone has any or seen any information posted please feel free to populate
Year of the S4: Example 2004 B6
Motor size: OEM 4.2
Mileage: example 130,000+
Audi lists there “NEW” specs on the 4.2@203=14 bar After break-in the acceptable levels should be 185psi anything over is steller. Anything under 130 or 9bar is known as too low or in need for repair.
You really don’t want to see a Difference between Cylinders = max 20psi
See video here
Compression tests should be done after the motor is up to operational tempiture
I will delete this post soon. Im going to update the original post to include
Here is a quick reference on what side of the motor your compression tests are from.
The motor firing order is 1- 5- 4- 8- 6- 3- 7- 2 Keep in mind unlike other motors our TDC is referenced with the #2 cylinder