4.2l A6 vs S6

 
Old 12-19-2013, 07:01 AM
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Default 4.2l A6 vs S6

I'm in the proses of buying an 2002 S6 Avant, the previous owner has informed me that the engine needs to be replaced. There are a lot of A6 engines for sale but I have yet to find an S6/S4 engine, as of now I do not know the engine code, but how different are these engines? Could I use the bottom of an A6 engine and move everything else over and get S6 performance.
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Old 02-06-2014, 04:36 PM
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yes use the complete s6 heads, exhaust manifolds and intake manifold. best bet is to get a audi a6 c5 4.2 l v8 engine code ART. and put the s6 parts on it
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Old 06-06-2014, 04:22 AM
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Originally Posted by Vinnie981 View Post
yes use the complete s6 heads, exhaust manifolds and intake manifold. best bet is to get a audi a6 c5 4.2 l v8 engine code ART. and put the s6 parts on it
Thank you, I'm still waiting to buy the car, there are some serious paperwork delay.

I will post when I start my project.
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Old 08-29-2014, 05:25 AM
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Default Hydro locked, I need a new connecting rod

Finally got the S6. Engine code BBD
Water had been entering the engine via the brake booster due to clogged drains.
Engine only have 65k miles, but it was not rotating freely, I initially taught one of the pistons was hitting the valves but as you can see one of the connecting rods was bent and on the down stroke the bottom of the piston hit the crank shaft.
Additionally the cam chain on the passenger side had jumped one tooth.

I was on e-bay last night looking for a connecting rod but no luck, called the dealer this morning and they only sell these rods as a short block for $$$$$

I have attached pictures of the rod, some of the markings on it are 077B DE BHS D 9
In the bottom the # 24 is in-graved.

Please let me know if you have one for sale.

Kris
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Old 10-27-2014, 06:06 PM
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Default Progress report

The car is now running, I really enjoy the power and the on rail feeling going around curves.

Replaced the engine with another BBD engine with about 100k miles on it.
I took the opportunity to replace cam seals, valve cover seals, dust caps, spark plugs,timing belt,thermostat, water pump, belt tension-er, idler pulley and tension-er pulley, when I removed the oil pan the baffles had been damaged so I used the one from the water damaged engine, I painted the valve covers silver and the coil packs black.

Also replaced was brake booster, brake master cylinder, front brake hoses, rotors and pads.

Still a few minor items I want to get to but it makes it more fun when it can be driven.
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Old 10-28-2014, 06:00 PM
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Congratulations on completing your project. Thanks for the update. Any pics of the finished engine?
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Old 11-01-2014, 05:51 AM
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Here are a couple of videos of the engine before and after installation.

https://www.youtube.com/channel/UCch...58d6xaggtpARZw
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Old 11-04-2014, 05:03 PM
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Looks like a new engine, nice job!
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