How to fix oil consumption on VW/Audi/Porsche 3.0T engine?
In this video I perform a two stage piston soak on a 2017 Q7 with the Audi 3.0T engine. The vehicle was burning 1L of oil every 2-400km under regular driving so I performed a piston soak with Seafoam and B12 to free up the clogged piston rings.
While the Seafoam soak showed no improvement, the B-12 soak worked very well. The Q7 is no longer burning oil so this was a great success. A few important points to consider:
Soak the pistons when they are at top dead center to ensure the whole crown of the piston is covered in liquid
Three pairs of 2 cylinders are normally at TDC at the same time - 1-6, 2-4 and 3-5
The process took 72hrs but can probably be shortened - that's 24hrs per pair of pistons x 3
I used 50ml of B-12 per piston ever 12hrs. That means I used 100ml of B-12 per piston on 600ml for the whole engine during the second stage of the flush
B-12 breaks A LOT of carbon from inside the motor. If the soak is performed at TDC, B-12 is also soaking the bottom of the valves and the injector tips
All of the garbage that B-12 dissolved accumulates at the bottom side of the piston (remember the piston is at 45deg) so when the liquid goes through the rings, the carbon deposits just sit on top of the piston preventing it from turning - you must clean your cylinders with compressed air after the soak
WARNING!
Always turn the crank by hand multiple rotations before using the starter. This is very important. If you feel any resistance STOP immediately and make sure your cylinders are clear from any debris. If you use the starter YOU CAN CAUSE SERIOUS DAMAGE!!!
DISCLAIMER
This video provides general information and discussion on the topic of piston soaking an engine and reducing excessive oil consumption. If you choose to try this method on your engine you do so at your own risk. This video and the information included in it are not intended to serve as a substitute for a consultation with a professional mechanic. Under no circumstances will Eurotrash Motorsports be responsible or liable in any way for any content, including but not limited to, any errors or omissions in the content, or for any loss or damage of any kind incurred as a result of any content communicated in this video, whether by Eurotrash Motorsports or a third party.
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