RS5 Engine failure

A5/S5/RS5
#18

So yes, the RS5’s engine has more in common with the R8 than with the RS4. There are aftermarket rods/pistons for the R8 which should work with the RS5’s motor. I’d make sure the cylinder walls are not scored heavily due to oil contamination.

I think those bearings are done!

The V8 M3’s had major bearing issues, with many cars requiring new bearings in as little as 40K miles. I’m just about to turn 70K and the motor is still going strong.

If your motor is consuming oil, take a good hard look at the PCV system. I was consuming oil for a while and did have to replace my PCV valves. I think they go bad and contribute to oil consumption long before they start to “whistle”.

I’ve had, literally, zero oil consumption since my last oil change using the Motul Sport (and new PCV valves). But…consumption was greatly reduced when I switched back to Motul Specific from Liqui-Moly.

#19

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Speaking of oil, the low engine oil warning light turned on in my RS5 and when I checked the owners manual it and it recommended Castrol Edge which is easy to get. How come I never hear anyone using it? I have about 33k on it. I have Total oil in my car now. Which oil should I be using?

#20

I think, if you can get it, you will be happy with 0w30 502/507 (I think) Castrol edge titanium. I go with that to stick with the same oil, but the titanium 5w30 LL is a lot more easy to come by here so I am running that more often than not.

The key is oil sample tests, to have this question answered. Otherwise, we will to wait for, God forbid, engine failures.

I can tell you this much though: this side of the pond Castrol (BP) is common in general. The only other oil you, although only rarely, get from Audi here is Mobil1. Most people here don’t know how to change their own oil and go to audi for the 600 USD oil change every 2 years or 20.000 miles.

Here is the point: I have rarely heard of engine failures here in Europe of the b8(.5) rs4 and RS5s. The same applies to the R8 with the same intervals. Based on that I would say that the titanium oil is doing a good job. Once I get a country where people take more notice of oil changes I will have the samples taken between oil changes, even.

#21

Thanks!

#22

If you check the specs, the Castrol Edge sold in N. America isn’t as good as the stuff sold in Europe so it wouldn’t be my first choice in N. America. I’m going to stick to my Redline oil.

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#23

Will check that out. The discussion about which oil to use probably deserves its own thread. It would be possible to compare oil samples of different oil using the kms/miles to oil change intervals in the on-board computer, as it takes driving style, # of cold starts etc into account (although probably not perfectly).

On another, new, topic, for burning off water and similar after the car has been sitting, before revving high, I am guessing just use the oil temperature gauge. You can maybe even just let it idle, since the fans and any cooling from air movement is minimized.

#24

Well, at least the new engine/transmission are in the same picture as the car. Currently rebuilding the rear suspension but hopefully get the package installed in the next week or two. Sold the OEM hood so I have to wait until Seibon does another batch of hoods, hopefully Jan or Feb.

Engine Install ready
Engine Install ready1080×810 194 KB

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#25

You could just get an A5/a4 hood in the meantime along with the whole rear subframe, might be easier. Have you considered Ohlins struts?

#26

Those headers look mean as fook !! Very nice indeed buddy nice job will be beautiful once it all together. Keep up the good work :+1::grin:

#27

I could do the A5 hood or steal the Carbon Fiber hood off my S5. I originally bought the Seibon Carbon Fiber hood for the RS5 but the S5 project got finished first so that’s where the hood ended up. Got the hood painted so now it would look out of place on the RS5.
I’m going with KWV3’s as I have them on another Audi and have been very happy with them. I know the Ohlins have a good track reputation too but the recommended rebuild frequence on them is too often for a street car.
I’ve also got the JHM Aluminum flywheel and now there are a few on Audizine who are compaining about some rattling going on. Sounds like it isn’t a driveability issue, just when idling. I’ll definitely follow that thread for the next couple of weeks.

#28

Guessing that’s just gear lash. The dual mass is designed specifically to target that but if you go supercharged, it’ll be a weak point. Not so with the single mass JHM flywheel.

#29

Well, not what I wanted to read the day my car goes in for the JHM flywheel.

I guess we will see :frowning:

#30

I would think the sound is going to be very minor. You won’t be able to hear it over the engine anyway, LOL.

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#31

You can hear it but only in park once you select gear that goes away completely its not terrible it’s just something you have to get used to as it different from the dual mass flywheel.
And as Ape is saying its gear lash something you get with having a single mass flywheel.

#32

Good to know, thanks!

Again, with JHM race headers, probably won’t be able to hear it, lol

#33

Look up Ducati dry clutch sound on YouTube. I’ve owned one and it always sounded like the motor was about to fail when at a stoplight, LOL. But the clutch basket is often “vented” and open so makes it extremely loud.

#34

So what was the verdict ? I had one on my B7 RS4 and the noise didn’t worry me but being a manual meant you could control shifts etc, with the RS5 I’m more interested in how it impacts gear changes or driveline snatch

#35

Flywheel or Headers?

#36

Flywheel

#37

It’s installed but the engine is still out for the header install.

From the feedback I’ve heard it’s a great mod, very little to no chatter, and because the car is a dual clutch, no issues with the clutch engagement, stalling, rpm etc