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Audi SUVs (Q7 & Q5) and other V6 TDIs Discussions area for Audi Q7 and Q5 TDI (2009+ in Canada & the US) as well as others with the V6 TDI such as the A6, A7 and A8 sedans.

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Old October 5th, 2019, 13:29   #1
Join Date: Sep 2019
Location: AB
Default Overfilled engine oil and engine knocking

We bought a 2013 Audi q7 TDI (US model) About 2 months ago. after driving just over 2000Km (including a 1600KM camping trip towing 6000lbs) We noticed some oil on the garage floor. and then we checked the oil for the first time and saw that it was over the max. So we towed it to the Audi dealer, and it was diagnosed with a faulty rear main seal, (but Audi said we could still drive the car) and that the leek was not too bad. So we picked up the car and after 58KM we heard engine knocking and pulled over immediately. After a short conversation with the dealer, we called a tow truck and had it towed back to Audi. After 2 days they called us to tell us that the engine is toast. So my question is, is it possible that too much engine oil caused the engine to blow up.
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Old October 5th, 2019, 13:36   #2
Vince Waldon
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Join Date: Apr 2009
Location: Edmonton Alberta Canada

To answer this question it would be best to have a lot more details about what "toast" means.

Oil-starved? Coolant-starved? Broken valvetrain? Broken rods?

That said, over-filling can blow out seals, which if go undetected can lead to oil starvation.

Or, perhaps it was overfilling due to a head-gasket breach and it was coolant rather than oil that made the level look high.

Lots of possibilities.
Vince Waldon Edmonton AB Canada
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Old October 5th, 2019, 13:45   #3
Join Date: Sep 2019
Location: AB

all Audi did was a sound diagnosis and that they need 15 hours to diagnose it properly.

also, it did not smock or leak any fluids.

and the knocking started instantly without previous symptoms

Last edited by Magus; October 5th, 2019 at 14:02.
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Old October 6th, 2019, 08:11   #4
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Location: CA
TDI(s): 02 Jetta

Possible that the oil level rose due to a failure in the fuel system?
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Old October 6th, 2019, 10:39   #5
Join Date: May 2019
Location: Canada,ont North America were Neighbours to usa
Fuel Economy: oh gosh alot better than burning Gasoline.?

Just curious does the knock sound change or go away with higher engine rpm?
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Old October 8th, 2019, 08:02   #6
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Join Date: Oct 2011
Location: Denver
TDI(s): A6, Q5, Golf
Fuel Economy: 32+

I’m hoping it falls under your extended warranty.
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Old October 21st, 2019, 12:39   #7
Join Date: Sep 2019
Location: AB

it's throwing these codes





any idea?
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