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Thread: Turbo Rebuild Kit...which one is the correct kit for RS6?

  1. #1
    Registered User Aronis's Avatar
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    Turbo Rebuild Kit...which one is the correct kit for RS6?

    Hello,

    I am looking at the choices on Midwest Turbo and they are ....

    Twin Feed Minor
    Single Feed Minor
    Twin Feed Major
    Single Feed Major

    http://www.midwestturboconnection.co.../3008-3011.htm

    Thanks

    Mike
    '18 BMW M5, '19 Porsche Boxster GTS
    (prior '94 325is, '97 M3, '00 A6 4.2,'03 RS6,'08 A4 Cab,'13 A8L,'15 Q7,'16 BMW M2,

  2. #2
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    Single feed is factory original on the RS6 k04. Twin feed is an upgrade but I'm not entirely sure it is a drop-in replacement without modification to the bearing housing. The major kits include a Thrust Washer & Thrust Flinger in addition to the items from the minor kit (probably worth the $20/ea). Pay close attention when you disassemble. The shaft and compressor wheel have material removed during the balancing process (may require re-balancing upon reassembly). The compressor housing is glued on and requires some gentle persuasion. I broke one bearing housing being impatient.

    I highly recommend new CHRAs (although I didn't check if they are single or twin feed). They come pre-balanced and are a simple swap. http://www.midwestturboconnection.co...uct-p/3505.htm



    Below is my disassembled original chra.

    03 RS6 Avus/Ebony #905593 resurrected 6MT, 04 Avalanche Z71, 87 T-Bird Turbo Coupe (351W T5), 04 Aprilia RSVR Factory

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    Registered User Aronis's Avatar
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    Bethridg,

    Thank you for the excellent feedback!



    Mike
    '18 BMW M5, '19 Porsche Boxster GTS
    (prior '94 325is, '97 M3, '00 A6 4.2,'03 RS6,'08 A4 Cab,'13 A8L,'15 Q7,'16 BMW M2,

  4. #4
    Registered User Aronis's Avatar
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    Turbine looks good.

    Click image for larger version. 

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    '18 BMW M5, '19 Porsche Boxster GTS
    (prior '94 325is, '97 M3, '00 A6 4.2,'03 RS6,'08 A4 Cab,'13 A8L,'15 Q7,'16 BMW M2,

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    Quote Originally Posted by Aronis View Post
    Turbine looks good.

    Click image for larger version. 

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    That's the compressor. Turbine is the other end.

  6. #6
    Registered User Aronis's Avatar
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    Yes, ddillenger, you are correct, as the Turbine is mess up. LOL.....I ordered two shinny new CHRA (Central Housing Rotating Assembly) LOL.


    Click image for larger version. 

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ID:	17062 Turbine is messed up.


    Click image for larger version. 

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ID:	17063 Housing is cracked.

    All in all $370 for new CHRA vs $70 to rebuild and (if done properly)$55 more the re balance, is an easy decision, especially since one side is cracked LOL. This explains the cup oil that was in the intercooler hose on that side of the car.

    Mike
    '18 BMW M5, '19 Porsche Boxster GTS
    (prior '94 325is, '97 M3, '00 A6 4.2,'03 RS6,'08 A4 Cab,'13 A8L,'15 Q7,'16 BMW M2,

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    Mike, I have a mint set of used ones about an hour and a half from you if it's a time crunch.

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    Good decision and peace of mind. I've got ~3k miles on my turbos now. Checked lower intercooler hoses at 500, 1500 & 3k(oil change) with just a thin film present. Build up wasn't too bad before the swap having ~1 tbsp/side every oil change. Safe to say a whole cup on one side is ....excessive.
    03 RS6 Avus/Ebony #905593 resurrected 6MT, 04 Avalanche Z71, 87 T-Bird Turbo Coupe (351W T5), 04 Aprilia RSVR Factory

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    Registered User Aronis's Avatar
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    Ddillenger,

    Thanks for the offer. I have the new ones on the way, due here tomorrow.

    My mechanic expects to have the car finished by next Friday.

    Mike
    '18 BMW M5, '19 Porsche Boxster GTS
    (prior '94 325is, '97 M3, '00 A6 4.2,'03 RS6,'08 A4 Cab,'13 A8L,'15 Q7,'16 BMW M2,

  10. #10
    Registered User JSRS6's Avatar
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    Did you pay 370 for both or 370 each?
    Avus RS 6, RNS-E/BT/RVC, Eurocharged/MTM, SuperSports, PSS9/Hotchkis, SS Lines/EBC Reds, FMU/BMC, Sportec vents, 007's, 9500ci, Black Optics/Headlights/Trim/Rims, CC; coming soon: stage 3 snow meth

  11. #11
    Registered User Bigglezworth's Avatar
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    You can get brand new OEM spec CHRA's from TRL out of the UK (www.turborebuild.co.uk) for £165 per unit; Stage 1 Hybrid (upgrade bearings
    and seals) £210; Stage 2 as above and including billet compressor wheel £230 ea. plus £40 for delivery. That is what I did when I replaced both turbos for the second time in the one ride I had here. The daily driver is starting to show signs of wear on seals as I'm getting a couple of table spoons of oil in the lower hose between oil changes now.... Damn.... Engine pull effort #6 here I come this spring. lol
    '02 S6 Avant Silver - Pokey | Carbon Black/Ebony RS6 w/ stuff - darn quick | '03 Daytona Grey/Ebony RS6 w/ more stuff - quicker yet | '91 NSX CDN issue with 6spd & BBSC - quicker yet and then some | '87 Buick GNX OEM clone w/ lots of stuff - quickest hands down

  12. #12
    Registered User Aronis's Avatar
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    JSRS6, $370 each plus shipping. They are from Midwest Turbo. Borg-Warner K4. Each side is different part number, the label with the proper part number is on the housing of the turbo.

    Bigglezworth, The CHRAs are factor Borg-Warner as far as I can tell. What did each engine pull cost you? LOL...

    I am waiting on a few more parts. He is starting to put stuff back together this week.

    Other than leaking some oil, I doubt the messed up turbine fins would effect boost much.

    Mike
    '18 BMW M5, '19 Porsche Boxster GTS
    (prior '94 325is, '97 M3, '00 A6 4.2,'03 RS6,'08 A4 Cab,'13 A8L,'15 Q7,'16 BMW M2,

  13. #13
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    Quote Originally Posted by Aronis View Post
    Each side is different part number, the label with the proper part number is on the housing of the turbo.
    Part numbers are different, yes, but the chra's are identical. Just clocked different depending on the side installed. Housings are just different.

    You should end up with with a pair of the following.

    Last edited by bethridg; February 3rd, 2016 at 18:33. Reason: wrong
    03 RS6 Avus/Ebony #905593 resurrected 6MT, 04 Avalanche Z71, 87 T-Bird Turbo Coupe (351W T5), 04 Aprilia RSVR Factory

  14. #14
    Registered User Aronis's Avatar
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    Thanks, I got an email from Midwest a little while ago telling me just that, the turbo housing are different but the Central Housing Rotating Assemblies are the same.

    ECS shipped the rear flange gasket today, so I am just waiting on the intake gaskets and tube of sealant from Pelican...The intake gaskets are on order directly from Audi....

    Mike
    '18 BMW M5, '19 Porsche Boxster GTS
    (prior '94 325is, '97 M3, '00 A6 4.2,'03 RS6,'08 A4 Cab,'13 A8L,'15 Q7,'16 BMW M2,

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