How bad is this scoring on my cylinder walls

[Black_Pearl_B6]

Just had the pistons and rings replaced by the dealer, to make a long story short I had to take the car apart to replace the head gasket to fix there shitty work and saw this


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[Black_Pearl_B6]

It looks like the dealer didn't hone the cylinders either, I'm tempted to take a dial bore gage home from work and take some measurement, also in taking this apart, I found this as you can see the screen is blown out like lettuce's any one know the part number for that piece or where to get it?



The moral of this story is don't take your car to the dealer, normally I would never but for free pistons and rings I couldn't resist


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[Mussa]

For the oil consumption case, during the pistons/rings replacement if a scoring on the cylinders are found, a crate engine is offered.

If I were you I'd go back to Audi and request a detailed control of the cylinders with an endoscope camera.

[bakedziti]

Its not surprising to me. I still question their stage II work for my car, as I had a bearing fail 10k later and the oil had been changed at least 2, if not 3 times in that 10k.

EDIT: They also neglected to return my turbo support bracket, and refuse to give me a new one, because I swapped my turbo 2 weeks later when they denied my warranty extension for the P2099.

[Black_Pearl_B6]

For the oil consumption case, during the pistons/rings replacement if a scoring on the cylinders are found, a crate engine is offered.

If I were you I'd go back to Audi and request a detailed control of the cylinders with an endoscope camera.

I don't know what kind of dealerships you have in turkey but here there horrible the first one I went to which was local wouldn't do the repairs because I change my own oil so I had to drive 40 miles to another dealership who told me the consumption was due to a bad turbo which I knew was bs so I changed the turbo mind you it was 5 degrees Fahrenheit for the whole week that I did it outside in my driveway I could barely move my fingers but I wasn't paying them 3500 to replace it. So finally I go through the process and sure enough the car burned a quart every 1000 miles so in repairing it they broke my intake manifold and tried to blame it on me and wouldn't repair it and on top of all that they charged me for all the timing components so I payed 1000 bucks for a car that barely ran with a broken manifold, also did I mention the tech put his knee through my rs4 grill, so after ten calls and complaints to Audi of America they wouldn't do anything, I did everything aside from get a lawyer as I work 70 hours a week and probly couldn't afford a lawyer.

So what I'm saying is, my chances of taking it back and having them do anything for me is pretty much out of the question unless I'm paying for it obv.

[pierreb]

B8 cylinder walls can't be honed. Have to be replaced with fresh short block.

[Black_Pearl_B6]

B8 cylinder walls can't be honed. Have to be replaced with fresh short block.

From my engine building experience when ever you replace the rings you should always hone the cylinders for a fresh start, and I'm pretty sure all metals can be honed, maybe your mixing it up with being bored out honing if done properly would only remove five tenths to a couple thousandths which would be .0005-.002 which could keep it in the allowable tolerance, depending on what it is, I'm not sure about these engines


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[roxta]

B8 cylinder walls can't be honed. Have to be replaced with fresh short block.

Yes they can be. I got 0.5mm oversized pistons just so that it could be done right, overboard and hone. Went from burning a litre every 400km to now burning a litre every 4000km. The dealers won't bore or hone, if there is significant scoring they'll quote you 20k AUD for a new motor.

[pierreb]

From my engine building experience when ever you replace the rings you should always hone the cylinders for a fresh start, and I'm pretty sure all metals can be honed, maybe your mixing it up with being bored out honing if done properly would only remove five tenths to a couple thousandths which would be .0005-.002 which could keep it in the allowable tolerance, depending on what it is, I'm not sure about these engines


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They're laser honed. Stay away.

[misterpepper]

Scoring doesn't look bad to me. 7'oclock in the 2nd pic looks by far the worst. I had my engine open recently and the walls looked similar, but we're very smooth to the touch. Can you feel any of them, or are they more of just a discoloration? Cylinder walls are coated with a very thin, hard coating, making them difficult if not impossible to hone. The cam bridge screen can't be replaced separately, you have to replace the whole cam bridge.

[Black_Pearl_B6]

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[Militant-Grunt]

Just had the pistons and rings replaced by the dealer, to make a long story short I had to take the car apart to replace the head gasket to fix there shitty work and saw this


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Does it catch your finger nail? Thats the first question a TAC consultant would ask me before they release an engine. If it doesn't, its within spec. I see cylinders like that fairly often when performing a piston ring job, but unless it is actually grooved deep enough for a fingernail to catch on it, then I can't do anything about it.

[Black_Pearl_B6]

Does it catch your finger nail? Thats the first question a TAC consultant would ask me before they release an engine. If it doesn't, its within spec. I see cylinders like that fairly often when performing a piston ring job, but unless it is actually grooved deep enough for a fingernail to catch on it, then I can't do anything about it.

Didn't really catch my fingernail at all and I have a pretty sensitive finger for that as I'm an applications engineer (glorified machinist) by trade, so I'm just gonna let it ride.

How important is the screen on the cam bridge, only reason I am contemplating replacing the cam bridge is because I don't wanna risk putting a new on in and the screen blows out again and does internal damage in my engine, I got lucky twice already and I don't wanna use strike three. Will there be any problems if I use it without the screen? I mean it was running like that before with no issues

[Militant-Grunt]

Didn't really catch my fingernail at all and I have a pretty sensitive finger for that as I'm an applications engineer (glorified machinist) by trade, so I'm just gonna let it ride.

How important is the screen on the cam bridge, only reason I am contemplating replacing the cam bridge is because I don't wanna risk putting a new on in and the screen blows out again and does internal damage in my engine, I got lucky twice already and I don't wanna use strike three. Will there be any problems if I use it without the screen? I mean it was running like that before with no issues

Important, I up-sell it on every piston job. If that ball drops out of there, you won't be a happy camper. Additionally make sure they put the updated timing chain tensioner on the car, if not, thats another item, along with the timing chain you should address.

Was the head gasket leaking? If the repair was done less than 12,000 miles or 1 year, you should shove it right back up that particular dealerships ass.

[misterpepper]

I put my cam bridge back in with the missing screen. My reasoning is that it had been running for who knows how long without it. That screen isn't going to catch the ball if it goes, considering it can't even hold onto itself. Ideally I would have a solid screen in there, but the choice between no screen and one that is likely to break again and send bits of screen into places I don't want them, for $100, was an easy choice.

[moosekevin]

If I may, can I get thoughts on how bad this scoring is on my camshafts?
Trying to gauge how long the car will continue to run.
I just had a LOT of word done under extended warranty, and not sure if I dump the car or not.
- Thermostat Housing Replacement: replace water pump and thermostat housing due to coolant
leakage
- Timing Cover - Upper: engine reseal. upper timing covers with seals and gaskets, lower timing cover
with sealant and hardware. cam cradle sealant and hardware
- Timing Chain Replacement: suggested to replace due to mileage while vehicle is timing cover
replacement

I did not get the head assembly replaced under warranty.

Thanks in advance!
Moose
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