This is like a horror movie channel for RS4 owners..

It’s not just the knowledge I love about this channel but how you are constantly trying to help the customer too. Looking forward to the next video already, thank you for the content.

Best channel on KZfaq. I'm going to bring you my B7 S4 just for the entertainment 😂👍

4:30 - Hahaha... "heavy metal concert going on". I love the wry sense of humour. Keep up the great work in explaining what is going on. Love the videos guys. Really informative.

This is one of my favorite channels! I love your work and dedication to Audi. Best way to spend my evenings winding down. I’d love to see some old 2.7T content. C5 RS6 was fantastic! Loving this RS4 series, too.

I love that blue b7 rs4 in background 👍👍👍

These are great videos, really interesting. I know very little about engines but enjoy your methodical approach to working out the issue. Thanks for sharing.

Malice in the combustionpalace!!

Brilliant content . Great watching you guys putting this all together.

If I had only 1/10 of your mechanical knowledge I'd die a happy man!

No better team to repair the car !! Perfectionist’s 👌👌

Cylinder head is repairable as long as it passes a pressure test before any machining is done ,new valve seats ,new valve guides on that cylinder ,new valves and a spark plug helicoil . dont worry about the bruising in the combustion chamber as its only cosmetic . wear in the valve guides can put a sideways load on the spring and cause it to fail

Great content as always from you guy's, looking forward to the next one 👍🏻

Outstanding content guys!! The love/ hate relationship with these automobiles and engines continues! As a 2005 S4 Avant owner, I wish I had you over here in the USA. You would be my go-to shop!

Brilliant video as always. Looking forward to the next one 😎😎

Top job again, looking forward to results

Great to watch guys!

As others have already commented - it is not a good reflection on Audi that these engines seem to fail in serious ways at quite low mileages, reasonably often. IMO, the valve spring is the root cause. That is why as mentioned early in the first episode, the vehicle ran sick for a while before the valve dropped completely. and stopped it. Audi used to be able to build a durable engine. I have a C4 A6 with the 5 cylinder TDI currently on 352k, never been opened and still going fine. The 5 pot petrol turbos in the early S cars can do big mileages too, as can the older 32V V8s.

great work you guys you defiantly know your stuff 👍👍

Massively insightful channel, I love it, great content !😀🇮🇪

First we want to thank you for the solid videos! Secondly : it is important to know about the year of production and how many miles are on the clock! Please start your videos always with these data! It would be very helpful for old and future AUDI owners! Thank you in advance, stay healthy and protected!

Great educational video🎉

The gift that keeps on giving, I run an older LHD Audi, German and Polish breakers are the best sorurce of parts but most of them understandably don't want to send parts to the UK any more.

Fantastic insight thank you 👍🏽

I've watched every one of your videos, and every time an rs2-3 comes into my garage, I know what to look for and how much to tell the customer 😂.

Hello VAG Technic, I hope this message finds you well. I am a fan of your videos from Chile, and I particularly appreciate the detailed content on repairing RS4 B8 models. I own an RS4 B8 myself and have been inspired to perform some repairs following your tutorials. I am reaching out to kindly ask if you could share information on where you source the various parts used in your videos. I am interested in attempting some repairs on my RS4, and having access to the same quality parts would be immensely helpful. If you could provide details or recommendations on reliable suppliers, I would be very grateful. Your videos have been a tremendous resource for DIY enthusiasts like me, and I'm considering taking on more tasks independently. If it becomes a bit overwhelming to hire professional assistance, having access to the right parts is crucial. Thank you for your time and for sharing your expertise through your videos. I greatly appreciate the valuable content you create.

Please guys, start using external mics! Love the channel❤

Helo grom Croatia...love your Chanel

love this channel

Always interesting, these Audi's.

I seriously didn’t expect that cylinder head to be anything other than scrap. How can it be repaired without effecting the compression in that cylinder.

B7 RS4 owner - never given me any problems, thankfully. Never modded, full service history. Too many people chase horsepower.

I've seen enough of I do cars videos to know that when a spark plug comes out looking like that the entire engine is going to be scrap😂

Unfortunate but hopefully the rs4 can be brought back to former glory

Can’t wait I’m watching

I like these multi part episodes

Happy owner😊💯

Great video Guys as always! What's your opinion about 4.0 twin turbo from S6/RS6? Have you seen many of these in your workshop?

Brilliant as usual , once more you have you have convinced me , dont buy an Audi v8 😂

When I was working in the dealer, some stupid tech was revving a customers car to redline for “fun” in the workshop. And this exact thing happens to an rs5. Cylinder 5 valve spring snapped. Also seen it on a few rs6’s too. Always cylinder 5

amazing work Gents. But the question that should be asked is why Audi charge the earth for cars that are built to the cheapest possible price with the cheapest most unsuitable materials and parts.

I was looking at a rs4 at the weekend , this has scared the shit out of me 😵

@6:36 mark, what causes the catalytic converters to go like that? failed pcv and oil getting to the exhaust over the course of time? or is it just general wear?

Seems like maybe the engine was over revved and floated the valves. If that machine shop can fix that head then you have an absolute wizard of a machinist.

I still want to know what was the fault in the SQ5 rebuilt a month ago at huge expense, and still not fixed. Great job as always.👍

If you could find a Passat estate with W12 engine that would be cool...I see them pretty much only in Germany...make a great sleeper

I have seen plenty videos and forums where on the b8 rs4/5 its always a broke spring or broke rod in the engine like is that common smh i know 450 hp 4.2l but damn audis V10 can go 100k easily smh I STILL WANT A RS5 The con rods are skinny i aint gone lie 8500 rpm doesnt mean cut cost smh

The valve dropped which means there was a heavy metal concert going on😂😂😂brilliant

Heavy metal concert... Had me in stitches when he said that 😂...😅...😂...😅

With purchase price and repair cost this is still a significant savings. Now the owner can sell for a profit

Ouch. 😢

The thought of a broken valve spring causing all that damage is scary. I think there is a question for Audi about their quality. I owned two and would never go there again. That said, this looks like a fascinating repair job, the only issue being for the owner to have the available money to fix it. I do feel for you when you're having to negotiate with the owner to get the funds to proceed. I think there is an experience and wisdom element of running a car of this age and complexity. Good job you can't teach wisdom. I'm sure the owner will get a good job. I'll be interested in that cylinder head repairability. It looks Goodnight Vienna to me. Thank you.

Car was over revved. Somebody drove it like it was a racecar lmfao. I'd love to fix that, looks like a fun job.

The heads can be laser welded.. Using a pulsed laser or even a pulsed tig. Low heat involved to keep the alloy hardness. The other thing.. Maybe invest in a cheap 100w laser cleaner.. removes almost everything very fast in the cleaning process

I still can't believe that a car as expensive as that Audi with that sort of milage on it, can fail as badly as that!! You certainly need deep pockets to own one of those beasts!!!😢😢😢😢

I love how easy it seems when you disassemble it 😂 one question: why these engines are so weak? so many problems...timing chain...valves...gaskets...cog wheels... 🤯

Ouch!!! Can't buy a champagne car and service it with beer money...having said that, the pistons can be replaced, the block will be fine, unless it's proper broken, but you can weld your magic on this one...get it??? LOL...anyway, where is the rest of the spark plug? In the piston? Cylinder head I reckon is repairable...but labour time will be costly and also the part is costly...needs new valve springs definitely....carbon is cleanable, but the main guts of it is damaged, so, depending on budget, can this be done economically...looking forward to part 3 of this

nice b7b rs4 in the background

Well... Parts car at least 👍

I guess it depends on what the owner paid for the car, but I think it's going to end up costing him as much as what a decent, running model would have cost him. All that rust though - that is concerning.

What is the service history on this car?

K, so my guess at the start is that the valve is buried in the piston itself and that's what's stopping it turning a full 360

I have a question. I'm overhauling my engine and need oversized pistons for the CFSA. Which pistons do you use in such a case?

Was definitely ragged about, that’s why it broke! Drive it like you stole it……lol😂

All forged new parts and stage 3 on it... 🤘💀🤙

Is all that carbon poor quality fuel also are these failures due to poor maintenance lack of oil change what’s the common factor please

So all this damage was caused by a spark plug failure?

if anyone can fix it, it's only you guys!

Don't think i will be buying an Audi anytime soon they seem very problematic will stick to my slightly problematic BMW.

Wow, realy damaged head and piston, if it was my car i would do 8 liners with new pistons, in the end a better engine.

Where are you guys based?

Sramota za Audi nakon 60k km.. sretno vlasniku 😅

Why would 1 spark plug cause the engine nor to run at all

that cyclinder would be as good as new...in India...send it to the experts

get your welding gear out and add a bit of metal, then grind it to shape- easy

Good chance it was over revving that was the cause.

Am I the only one hearing that smoke alarm chirp or am I going insane

blue boxes everywhere

Only logical thing to do is put a big turbo diesel in it to upgrade it.

This is gonna give me sleepless nights with my 71k RS4... Lol

Scrap!

So apart from Audi engines being shit! Why would a spark plug explode like that?

Could have do without all the noise

Money pit

Scrap it

its only aluminium

Bruh. Why don't u just swap a used motor into it? Spending all that money to rebuild it is a waste imo especially if they aren't adding upgraded or performance parts. 🤷 still a good video tho

Parts car? Doesn’t seem viable at this point to keep going.

Possibly bad injector 🤔🍺

Why do you guys and others have to pull these engines for even small stuff 😅😅

They look great, the cars, but very poor engineering. Likely intentional built-in obselesence

Get a good used engine

These Audi's are crap

Great content , as per usual, it makes you think, no such thing as a cheap RS, obviously current owner knew the risks when he bought it, but as I’d like a B7 version at some point, it pays to pay the money on a well loved one, as any major engine issue, any saving on purchase price is wiped out instantly, love your work ethic 🫶👍