Oil leak or seepage B9 S5 (pics)

[chicagobahn]

Hey all,

The other day I installed my downpipe at a shop and we came across what appeared to be a mild leak sort of right below the engine and right in front of the transmission. I was wondering if any of you maybe have come across anything similar? I may have to take it to the dealership to have it diagnosed where they will tell me my warranty is voided haha IMG_3996.jpg
IMG_3998.jpg


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[KLX]

If you still have a warranty, can't you take it to any AES certified mechanic, and they can bill your warranty company, my old APR dual pully stage 2 s4, had a 3rd party warranty and I got all kinds of things replaced under warranty, but I didn't take it to a dealer..my excuse was they were too far away, but I would call my warranty company and ask if you can take it to a local mech, and what is the process...My leak was the oil filter housing.

[wwhan]

+1

If you still have a warranty, can't you take it to any AES certified mechanic,.....

Oil leakage was a problem on some 2018/2019 2.9/3.0 L models.

15 Oil leak from cylinder head - 2.9 and 3.0TFSI only, TSB # 2053278/2 February 5, 2019.

https://static.nhtsa.gov/odi/tsbs/20...55709-9999.pdf

[chicagobahn]

If you still have a warranty, can't you take it to any AES certified mechanic, and they can bill your warranty company, my old APR dual pully stage 2 s4, had a 3rd party warranty and I got all kinds of things replaced under warranty, but I didn't take it to a dealer..my excuse was they were too far away, but I would call my warranty company and ask if you can take it to a local mech, and what is the process...My leak was the oil filter housing.

I only have factory warranty, and not much of it left


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[chicagobahn]

+1



Oil leakage was a problem on some 2018/2019 2.9/3.0 L models.

15 Oil leak from cylinder head - 2.9 and 3.0TFSI only, TSB # 2053278/2 February 5, 2019.

https://static.nhtsa.gov/odi/tsbs/20...55709-9999.pdf

I think that if it was the cylinder head I would be able to find oil around the middle and upper portion of the engine right? This seems to be more so below


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[bluestyle55]

Following. I have an 2019 S5 with 25k. Did the same job and noticed the same leak a few weeks ago. Cleaned it up and was going to go back and check it again later.

[PassionForAudi]

Hey all,

The other day I installed my downpipe at a shop and we came across what appeared to be a mild leak sort of right below the engine and right in front of the transmission. I was wondering if any of you maybe have come across anything similar? I may have to take it to the dealership to have it diagnosed where they will tell me my warranty is voided haha IMG_3996.jpg
IMG_3998.jpg


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Back in November I took my B9 in for an oil change (CARFAX is quite important to some, especially when selling the car and dealers report), I bring the car back home and the next day I notice a leak running down my driveway, I figured that it’d be something along the lines with the oil change that was just done so I take it in and they tell me that the oil filter housing’s leaking and that it’s a seal within that area and that it’d run somewhere along the lines of $2,400.00 and that my C.P.O. would cover it. Luckily I was still within that warranty because I was a month away from that expiring! Just thought I’d drop by to drop my 2¢ on what I feel might be the issue with you on that end! 🫡


#AudiForLife

[wwhan]

I think that if it was the cylinder head I would be able to find oil around the middle and upper portion of the engine right? This seems to be more so below....

The TSB does mention oil on the underbody. Oil has a way of traveling down to the lower back of the engine.

[chicagobahn]

Following. I have an 2019 S5 with 25k. Did the same job and noticed the same leak a few weeks ago. Cleaned it up and was going to go back and check it again later.

I did the same, probably gonna drive for another week or so before looking to see how bad it is. Your warranty should be good though ?


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[chicagobahn]

The TSB does mention oil on the underbody. Oil has a way of traveling down to the lower back of the engine.

Next time I look at the leak I will try to do a better job of tracing it


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[S4'ed]

Or leaking rear main crankshaft seal?

[dark_side_s3]

I had this issue on my 2018 SQ5. It was the rear main seal and there was also a sensor that was leaking ( I think it was can position sensor). Luckily it was under warranty as the repair was almost $7k.

[LYFESGD]

As info, I just had the same oil leakage on a 2018 S5. Mechanic noticed it when changing plugs and coil packs. They thought it would be the oil cooler seals, turned out to be the oil filter housing. A known problem. Had them replace all seals to oil cooler and filter housing.

[chicagobahn]

I had this issue on my 2018 SQ5. It was the rear main seal and there was also a sensor that was leaking ( I think it was can position sensor). Luckily it was under warranty as the repair was almost $7k.

Thank you for the insight, I have yet to do anything about it at this time still waiting to re evaluate here in a few weeks


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[chicagobahn]

As info, I just had the same oil leakage on a 2018 S5. Mechanic noticed it when changing plugs and coil packs. They thought it would be the oil cooler seals, turned out to be the oil filter housing. A known problem. Had them replace all seals to oil cooler and filter housing.

Interesting, I’ll have to read more into this. Thanks, will keep ya posted when I get my car back to further inspect (I got rear ended the other day -_-)


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[plai7778]

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2018 Audi S5 Sport back 47k Mi. This seems like a common issue in the B9 3.0 TFSI. Has anybody had a leak like this that gradually expands?

CPO till 7/2024 or 60k. Service advisor states there's a small leak no leak or "residual oil"
They put a special dye in to further diagnose. I really hope its not the rear main seal or timing chain cover

Anybody with similar experiences? Or rather, specifically how to get Audi to cover it under warranty.

[initiala4]

I have started to see this in my car though.

The tech states that it is the rear main seal.

[JonnyBravo!]

At first, I thought it was all due to my oil filter housing gasket. So I fixed that, but I'm still seeing some leakage, though not as bad as before. It's probably the rear main seal...

[A4fuzz]

I just dropped my 19 RS5 Sportback off at the dealer for an oil leak. I found oil in the drivers side rear spark plug tube when doing the plugs. Looks like it would be the seal mentioned in the above TSB but in typical dealer fashion they have no insight until a tech looks at it. I'm under warranty still so hopefully its all covered. As far as I can tell there's no external oil leaks but I have not checked under the car so who knows.

[PassionForAudi]

I just dropped my 19 RS5 Sportback off at the dealer for an oil leak. I found oil in the drivers side rear spark plug tube when doing the plugs. Looks like it would be the seal mentioned in the above TSB but in typical dealer fashion they have no insight until a tech looks at it. I'm under warranty still so hopefully its all covered. As far as I can tell there's no external oil leaks but I have not checked under the car so who knows.

Warranty SHOULD ALWAYS cover these types of issues. Only reason that I could see them denying anything would be if you were to roll on in there with a flashed ECU.


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[A4fuzz]

Warranty SHOULD ALWAYS cover these types of issues. Only reason that I could see them denying anything would be if you were to roll on in there with a flashed ECU.


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Well, unfortunately the dealership met my expectations… There’s a chance they can still redeem themselves but this response is not reassuring.

“as for spark plug issue.. we are still digging into we do know the tsb you are talking about however at this point we are not seeing an issue. as to see just a tad bit of oil up in the plugs is not concidered a leak and is normal but we are still looking into this”

I’m posting this here not to hijack the thread but it is relating to the tsb posted above and relative to the OP issue.

[plai7778]

After they put the dye in the motor oil, the service advisor took the car for a week.

In order to bill insurance and start an estimate, he needed definitive proof that there is an oil leak meaning he has to see the dye around the RMS.

After a week, they acknowledge the leak. They are in the process of starting the paperwork
I do not know if they are doing the RMS/Timing cover seal or oil filter housing gasket.

Strongly advise anyone with a B9 to check their RMS especially under warranty

More updates to follow

[TJUNER_RS4]

Same issue on my 2.9 RS4, crankshaft oil seal (main seal) is leaking. Just a few days before my warranty experienced, I reported it and they approved the repair. It seems to be a common issue.

I would recommend everybody with the EA839 motor to have a look at it. It starts with just a few oil drops on the line under the transmission cooler.

[initiala4]

Same issue on my 2.9 RS4, crankshaft oil seal (main seal) is leaking. Just a few days before my warranty experienced, I reported it and they approved the repair. It seems to be a common issue.

I would recommend everybody with the EA839 motor to have a look at it. It starts with just a few oil drops on the line under the transmission cooler.

is yours the front or rear leaking?

Mine seemed to show signs in the rear.

[TJUNER_RS4]

is yours the front or rear leaking?

Mine seemed to show signs in the rear.

Rear, it's leaking out of the connection between engine and transmission.

[initiala4]

Rear, it's leaking out of the connection between engine and transmission.

Thanks for confirming.

Do you happen to know what parts were replaced?

06E 103 051 J Oil seal rear main
0D5 498 111 Gasket set for axle drive

So far i have these 2 parts

[plai7778]

Quoted 5k for RMS transmission out job. They also quoted 2.3k for the timing cover and seals all covered by warranty.

Others with the RMS replaced have quoted that it was misdiagnosed and it was eventually the transmission cooler line or oil filter housing gasket. Does anyone know how much each of these jobs are quoted at?

Expecting the car back in 10 days.

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[fusion3214]

ive got an sq5 with the same oil leakage and it was the lower timing cover. rear main seal was replaced as well, part numbers listed below. i would highly suggest buying new bolts as i snapped the first one when trying to torque it. transmission bolts can be re used once, dm me if you need part numbers.

6x N-911-276-02 (arrows)
19x N-104-134-05 (numbers 1-6)
1x 06E-103-051-J (rear main seal)

torque specs and pictures as followed -

arrows - 3nm, 8nm + 90deg
numbers - 8nm + 90deg
lower timing cover 1.jpg
lower timing cover 2.jpg
lower timing cover 3.jpg

[spacecase]

Have this exact leak. Took it to Audi and they replaced the transmission oil cooler line. I checked again and it’s still leaking, but very lightly now. The line sprays oil everywhere and looks like an rms leak. Audi will probably replace the hose and transmission oil cooler this time

[Andy_FL]

Have this exact leak. Took it to Audi and they replaced the transmission oil cooler line. I checked again and it’s still leaking, but very lightly now. The line sprays oil everywhere and looks like an rms leak. Audi will probably replace the hose and transmission oil cooler this time

Good info, can you post up the part number(s) that they put on the work order?

[TJUNER_RS4]

After a long while I got my RS4 back from AUDI. It was assumed in the beginning that just the crank seal is leaking, but in the end they found out that the timing cover was leaking as well.

[spacecase]

Good info, can you post up the part number(s) that they put on the work order?

I got you. https://imgur.com/a/P9ujUjA

Also, in another forum for audis peope are running into this and some even replaced their RMS and Timing Chain covers and still had the same leak. Their outcome was that the transmission oil cooler line was leaking instead.

The pictures in this thread look very similar to how mine looked.
https://imgur.com/a/7RWE5sJ

[TJUNER_RS4]

@spacecase For me the second picture looks like engine oil. I could be wrong, because I would need to see, feel and smell it in person, but I'm quite sure that it's not ATF fluid.

But every good mechanic will be able to sort it out very quick and tell what it is.

[spacecase]

@spacecase For me the second picture looks like engine oil. I could be wrong, because I would need to see, feel and smell it in person, but I'm quite sure that it's not ATF fluid.

But every good mechanic will be able to sort it out very quick and tell what it is.

ha, unfortunately audi was being a pain and refused to acknowledge where the leak is. Im working with the service manager and lead tech and going to figure out this problem as the dealership I go to said this is a tricky leak to solve. They said they've been told it can be the RMS/timing Chain cover, the oil cooler line, or from the oil filter gasket. I've already added a tracer dye a few months ago and it didn't seem like it was from the rms or oil filter gasket. When I checked again after the oil cooler repair, I saw the leak was a lot less and coming from the bottom of the oil cooler line.

I do lose about a half a quart of oil every 1-2k miles. I originally thought it was the RMS/timing chain cover, but again someone on Audiworld got theirs replaced and ended up having to replace their oil cooler cos the leak was still happening. For me, if you look at the oil pattern, it looks like its being sprayed from the oil cooler line. Now there are legitimate rms/timing chain cover leaks, but if your oil cooler line is also dirty that could also be the culprit. Ill follow up once I figure this out and get it fixed from Audi, but I predict they're going to have to replace the actual oil cooler and the hose/o-ring. Last time they only replaced the hose. Here is a TSB for BMW's leak. We have the 8HP55 but I don't think there's much of a difference. https://static.nhtsa.gov/odi/tsbs/20...79024-9999.pdf

Check out this recall https://www.motorbiscuit.com/recall-...gas-oil-leaks/ uses same engine and transmission as us. seems like the culprit.

[initiala4]

Just a heads up.

Just checked my car again, and there is another leak on the oil cooler gasket, and the oil filter gasket as well.

[EarlGT2]

Just a heads up.

Just checked my car again, and there is another leak on the oil cooler gasket, and the oil filter gasket as well.

Oil filter housing and oil cooler seal are the culprits of these leak 80% of the time. I have yet run into a EA839 with an actual rear main seal leak.
Check for oil in the valley of the engine, just to the right of the filter housing. Runs down the back of the engine while your driving. I almost had my rear main replaced and we caught these to leaks. No leaks since.

[Andy_FL]

Oil filter housing and oil cooler seal are the culprits of these leak 80% of the time. I have yet run into a EA839 with an actual rear main seal leak.....

Just for clarification - are you an indy shop mechanic or work at a dealer? It sounds like you've worked on or diagnosed many EA389s, and while I am (was?) pretty certain my leak that appears identical to the OP.....I also thought I inspected the valley and filter housing pretty well when I had the turbo out. I hope I'm wrong but I had nearly made up my mind it might the RMS.

[Andy_FL]

Oil filter housing and oil cooler seal are the culprits of these leak 80% of the time. I have yet run into a EA839 with an actual rear main seal leak.....

Just for clarification - are you an indy shop mechanic or dealer tech / SA? It sounds like you've worked on or diagnosed many EA389s, and while I am (was?) pretty certain my leak that appears identical to the OP.....I also thought I inspected the valley and filter housing pretty well when I had the turbo out. I hope I'm wrong but I had nearly made up my mind it was the RMS.

[IGY6MJ]

So what’s the verdict? I see a few different things. Trans cooler line, rms & timing cover, and oil filter housing.

I have a new to me 2020 B9 SQ5. I was under it this week changing several fluids that required me to remove all three covers. I’ve changed the oil once but I use a vacuum to pull from the oil dipstick. I’ve put 3k miles and no issues or oil level warning lights. Hopefully this is a good sign?

I’m out of warranty by the in service date and well over the 50k mileage. Has anyone outside of your warranty had Audi cover the repair and parts?

I’m also not modified. No ecu/tcu flash and it shows all service completed at Audi, oil changes and all the mileage intervals. Maybe this will help.


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[teamgomez]

Dropped into this thread as I diag an oil leak on the wife’s ’18 SQ5 and couldn’t believe what I read:

After they put the dye in the motor oil, the service advisor took the car for a week.

YGTBMFSM. If a SA ever said that he needed to take my car for a week and drive it, I’d tell him to send his wife over for a week and see how he likes it after she gets home…never heard of any SA telling customer that he needed to ’take a car for the week’. I’d be all over AUDI USA’s ass on this one; SA should have released the car back to you to drive for a week.

I found oil in the intake valley and found a very inexpensive aluminum housing on the ‘bay. Ordered it along with the $50 -G gasket and I’ll either drop the aluminum one in or just put a new gasket on current housing given the failure rate of the gasket is far, far greater than housing failure. We’ll see.