Non c5 'RS6' project

4.2 V8 40v biturbo - 450 bhp
4.2 V8 40v biturbo - 480 bhp (plus)
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Lander91
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Non c5 'RS6' project

Post by Lander91 » Mon Oct 03, 2022 8:34 am

Just a bit of fun. During a conversation with a dealer contact they mentioned that they had a 2021 RS6 in the Shop where the owner had somehow hydrolocked the engine, big puddle was all the detail I could get.

Anyhoo I asked what's happening with the ex-engine and he said scrap. So for a box of Heineken I've got a complete but apparently bent RS6 long block.

I'm looking forward to taking an engine apart without worrying about putting it back together.

The plan is to see if I can do the old engine block coffee table setup. Will post pics of the carnage when I reach it.
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srichards
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Re: Non c5 'RS6' project

Post by srichards » Mon Oct 03, 2022 9:00 am

I wonder if it was Rufford Ford? The number of absolute clackers that drive through there is amazing.

You might get it running then you can pop it on a lawnmower base and create the fastest lawnmower in the world :biggrin3:

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Shoppinit
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Re: Non c5 'RS6' project

Post by Shoppinit » Mon Oct 03, 2022 9:21 am

*Subscribed*
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

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Shoppinit
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Re: Non c5 'RS6' project

Post by Shoppinit » Mon Oct 03, 2022 9:22 am

Friend of mine had his C7 PE engine replaced FOC by Audi because of excessive oil consumption. I really wanted to get his old engine back to put it in my Range Rover.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

Lander91
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Re: Non c5 'RS6' project

Post by Lander91 » Tue Oct 04, 2022 2:38 am

Cracked into the engine. Interesting valve train, no valve covers per se, the valve cover doubles as the camshaft carrier with the cam lobes acting directly down onto a pretty beefy neddle bearing within the rocker arm. "Sir your valve cover has a leak, that'll be $1500 per side to remedy..." F that.

Engine must have been locked up as it wasn't on TDC and with no timing chain master link accessible out comes Mr Grinder. That's just to get the valve cover/cam setup off.

Heads were easy.

Then I found the culprit. Water indeed found its way into the engine. The last interesting (sort of) detail is that the engine has iron liners, otherwise it looks like a very stout unit. MLS head gasket, with 13 or 14 mm OD head bolts.

Next step is to turn the engine over, I'll just tip it out onto the lawn, and attack the bottom end *giggidy* My guess is that rods 6 &7 are going to be a little out of shape..
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MeTsU
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Re: Non c5 'RS6' project

Post by MeTsU » Tue Oct 04, 2022 5:31 am

That's a rad project!
2004 Audi RS6 Avant Plus #283

Lander91
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Re: Non c5 'RS6' project

Post by Lander91 » Tue Oct 04, 2022 5:45 am

MeTsU wrote:
Tue Oct 04, 2022 5:31 am
That's a rad project!
Thanks.

Lander91
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Re: Non c5 'RS6' project

Post by Lander91 » Tue Oct 04, 2022 5:47 am

I don't see any signs of issues with the oil that would indicate damage or contamination of oiled components. I wonder if there's any market for the unused components. No need for the heads and everything within. Rods and pistons may be used as stands for the glass or 'legs' for the block.

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Shoppinit
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Re: Non c5 'RS6' project

Post by Shoppinit » Tue Oct 04, 2022 7:49 am

Fascinating stuff!
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

srichards
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Re: Non c5 'RS6' project

Post by srichards » Tue Oct 04, 2022 9:08 am

How long did it sit with water in it? It's quite rusty.

Lander91
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Re: Non c5 'RS6' project

Post by Lander91 » Wed Oct 05, 2022 12:36 am

srichards wrote:
Tue Oct 04, 2022 9:08 am
How long did it sit with water in it? It's quite rusty.
I think the mishap happened in May this year, but given the liners are iron rust would start in pretty quick.

Lander91
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Re: Non c5 'RS6' project

Post by Lander91 » Sat Oct 29, 2022 9:07 am

So the engine is fully dismantled I let my boy loose on it with an impact gun. Interesting case. Firstly, any fasteners not significant, like a headbolt, we're all the same which would be awesome if I was putting it back together.
The dealer was vague on the actual cause of the engine replacment but the main points discussed centre around water going where it shouldn't.

There is no obvious signs of hydraulic lock, conrods "look" straight, but as they're cast with a wavy casting line it's hard for the eye to pick up any major deviation.

Ostensibly everyting looks perfect, oil is a bit darker than I'd expect for a car of this value, but who knows.

What I have found that's not good is the water in the cylinders, sump and detritus in the oil galleries. Most significant of which is flotsam in the crank oil galleries.

It has had a significant flooding, I reckon it went in and then stalled getting stuck in the water for a time, enough time for water to make its way throughout the engine.

Big end bearings show barely any wear, just look at how fresh the main cap bearings are!

The next update will be a closer look at the conrods and close ups.of the gunk in the crank galleries.
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Shoppinit
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Re: Non c5 'RS6' project

Post by Shoppinit » Sat Oct 29, 2022 10:10 am

I'd be tempted to put it back together with a new head gasket and see what kind of compression you get.

Would be nice to get the engine running. Maybe you could use a electric ignition kit and some carbs to get it running to see what's what.

Fun projet.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

Lander91
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Posts: 375
Joined: Sat Oct 03, 2020 8:12 am

Re: Non c5 'RS6' project

Post by Lander91 » Sun Oct 30, 2022 1:50 am

Yeah I may reconsider the whole coffee table thing if the rods look ok, though only as spares to sell.

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