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  1. #1
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    is there anything else to worry about?

    with the impending balance shaft failure on my BLB 2005 2.0tdi A4, i put my car off my road at the sart of february as the engine rattling noise my car had developed got a lot worse. there is 71k miles on the car. the car was parked up on the drive and the replacement chain to gear unit was ordered with my indy. after a 13 week wait for the part, the car was taken by a friend in a local recovery company to the indy and left with him. whilst its in there, im also getting the remains of a standard service, timing belt, water pump and tensioner and clear headlights and 6000k HiD's fitted. its also getting the driver window motor replaced as this stopped working around christmas.

    this is going to cost a lot of money and although id love a new car, after replacing the clutch and DMF at christmas and now the balancer shaft unit i cant afford to. so what i want to know is is there anything else i need to worry about? anything major that could cost me thousands (like the balance shaft failure?). what is this hex drive failure i keep hearing about? is this replaced when converting to a gear driven system or is there another fix?

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  3. #2
    Wrath's Avatar
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    Yes, the hex shaft is used in both chain and gear driven scenarios. There has been some question over the fitting of the hex shaft, basically if it is loose then it will wear and end up with a shafted engine. Some people have reverted to getting a shaft custom made.
    Nathan

    Red Audi A4 B7 S-Line with Leather/Alcantara interior

    Current Mods: Painted Brake Calipers, Gear-driven oil shaft assembly, RS4 grille, Debadged, B8 MFSW, Cruise Control, RS4-style Fog Surrounds, Satin Black Cupra R Splitter, RS4 RARB, Clear Corner headlights, 2011 RNS-e, MTEC Drilled and Grooved Brake Discs.

  4. #3
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    Hello mate. I think your oem gear conversion should have a newer 100mm hex instead of 74. Which will hopefully wear less as it has more contact with balancer due to extra depth into it. Also some say that the new one is centred better to balancer not sure how true this bit is.
    Cheers matt
    Audi A4 2lt 170 TDI Quattro s-line, B7, BRD engine code. Mods so far; cruise control, DPF delete, EGR delete, unicorn remap, B5 perches, RS4 rear arb, RNSE with SDS, 2013 maps with speed cams, aux in, powermax remanufactured balancer, Sachs SRE organic clutch and pressure plate with LUK flywheel. Mods to do; s4 break upgrade, glove box fridge perhaps...

  5. #4
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    Quote Originally Posted by Wrath View Post
    Yes, the hex shaft is used in both chain and gear driven scenarios. There has been some question over the fitting of the hex shaft, basically if it is loose then it will wear and end up with a shafted engine. Some people have reverted to getting a shaft custom made.
    Quote Originally Posted by matthew999 View Post
    Hello mate. I think your oem gear conversion should have a newer 100mm hex instead of 74. Which will hopefully wear less as it has more contact with balancer due to extra depth into it. Also some say that the new one is centred better to balancer not sure how true this bit is.
    Cheers matt
    thanks for the replies guys. i suppose what i am concerned about is is the hex drive part of the replacement gear driven unit, or is it not replaced when converting? i dont want to fork out a couple of grand to fix the probolem only for something else to happen. how do i know or how can i find out? as you said matthew i hope its part of the oem conversion!

 

 

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