I have an Audi Q7 SUV. Water is mixing with the Oil

I have an Audi Q7 SUV. Water is mixing with the Oil Mechanic's Assistant: When was your last oil change? 4 weeks ago Mechanic's Assistant: What year is your Q7? 2012 Mechanic's Assistant: Are you fixing y...

I have an Audi Q7 SUV. Water is mixing with the Oil Mechanic's Assistant: When was your last oil change? 4 weeks ago Mechanic's Assistant: What year is your Q7? 2012 Mechanic's Assistant: Are you fixing your Q7 yourself? What have you tried so far? The issue was only noticed two days ago. Have not tried anything

Automotive Expert
Hello, and thank you for your question. I am reviewing it now and will reply again in a moment.
Automotive Expert
Most likely the cylinder head gasket is damaged. Typically the metal gasket is cracked between the cylinders. **\*The website will prompt a phone call automatically, NOT me. So please don't let this automatic service prompt annoy you. I prefer using text-only since most of the time I am inside the shop.** The repair is quite expensive, you are looking at somewhere around $3000-4000. Most of the expense is from the labor.

Do you think the Cylinder could be damagedPlease give details of repairs to be carried out
Automotive Expert
I don't think the cylinder is damaged. Typically is the cylinder head gasket follow by the cylinder head that gets damaged. You could do an engine compression test to prove it. Do you have experience with extensive engine repair? This is at least an 18 hours job that requires various tools and experience.

Ho do I go about the engine compression test
Automotive Expert
Get yourself a block tester much easier to perform. [https://www.amazon.com/Block-Tester-BT-500-Combustion-Leak/dp/B06VVBSFTF/ref=asc\_df\_B06VVBSFTF/?tag=hyprod-20&linkCode=df0&hvadid=312177448019&hvpos=&hvnetw=g&hvrand=\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*16&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9004340&hvtargid=pla-570352767565&psc=1&tag=&ref=&adgrpid=61495038909&hvpone=&hvptwo=&hvadid=312177448019&hvpos=&hvnetw=g&hvrand=\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*16&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9004340&hvtargid=pla-570352767565](https://www.amazon.com/Block-Tester-BT-500-Combustion-Leak/dp/B06VVBSFTF/ref=asc_df_B06VVBSFTF/?tag=hyprod-20&linkCode=df0&hvadid=312177448019&hvpos=&hvnetw=g&hvrand= *****************16&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9004340&hvtargid=pla-570352767565&psc=1&tag=&ref=&adgrpid=61495038909&hvpone=&hvptwo=&hvadid=312177448019&hvpos=&hvnetw=g&hvrand=***************** 16&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9004340&hvtargid=pla-570352767565) For the compression test - you will need a Compression Tester. But you should use a block tester first to diagnose.

What is the method in using the BT 500 Block Tester - as seen on Amazon
Automotive Expert
Basically, this tool is test if there is combustion gas in the coolant.
Automotive Expert
see link 1
Automotive Expert

I forgot to mention that the Q7 is Diesel
Automotive Expert
This tool can be work both in diesel engines also.
Automotive Expert
I will be back tomorrow morning, let me know if you have further questions. I will get back to you tomorrow.

Ok Thanks very much for your assistance

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