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Thread: CV Boot split

  1. #1
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    CV Boot split

    I have recently had a tear in what I believe is the outer CV boot.



    There has been small amounts of grease or whatever it is deposited around the hub of the left wheel.

    Today after returning from the VW Syd drive, I was looking in the left wheel as some of my recent brake noise had returned. There was a lot of small grease splatters on the inside of the wheel.

    Can someone tell me:

    How hard this part is to replace?
    Is it called the outer CV bush?
    Am i likely to run into issues if this is not fixed pretty quick?

    Thanks.
    Last edited by noone; 11-01-2010 at 11:30 AM.

  2. #2
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    Thats a CV boot. The grease will go everywhere depending on how fast you are driving. No real chance of harm to the joint, You could leave that a few weeks if you had to.

    Probably an hours work to replace the boot. Not a bad DIY job but you can get stuck without a few special tools on hand. Ball joint splitter and 30mm socket for starters.

    Gavin

  3. #3
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    I'd get the boot replaced ASAP, as if you let the grease seep out, the joint will eventually run out of lubrication and then begin to make a thudding noise as the bearings inside become damaged.

    Its much cheaper to replace the boot than the entire CV end thats for sure.

  4. #4
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    If the car is still covered under warranty, use that...Much cheaper (read free), and less heart ache...And you don't have to dig that molybdenum grease from out under your fingernails!!
    "If can't get behind your troops, feel free to stand in front of them..."

  5. #5
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    Quote Originally Posted by Blitzen View Post
    If the car is still covered under warranty, use that...Much cheaper (read free), and less heart ache...And you don't have to dig that molybdenum grease from out under your fingernails!!
    Yeah and trail it into the house and it gets everywhere. Warranty is the go for sure, left shaft you will have out in 15 mins with the right gear and no ball joint splitter reqd. Remove the drop link and the abs sensor do avoid any damage to it. renew the hub nut also. 3 ball joint bolts and the flange bolts and its out. Dont let it gape for too long or you will also get grit up in there, which is just as bad as loosing the grease. And it makes an awful mess. Mate im looking at Polos with over 90K now regularly and the boots are all sound. warranty unless its found to have a foreign object cause the split.
    Cheers
    Jmac
    Alba European
    Service, Diagnostics and repairs. Mobile Diag available on request
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  6. #6
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    Quote Originally Posted by Blitzen View Post
    If the car is still covered under warranty, use that...Much cheaper (read free), and less heart ache...And you don't have to dig that molybdenum grease from out under your fingernails!!
    +1. I had one of mine replaced under warranty at 60,000 ks.

  7. #7
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    Quote Originally Posted by noone View Post
    Is it called the outer CV bush?
    Am i likely to run into issues if this is not fixed pretty quick?
    It is called a CV joint. It has precision ground balls & accurate machining in the inside.
    It needs to be fixed ASAP before any water or dust gets inside. It would be like removing the seals on a sealed ball bearing, it wouldn't last very long.
    Understand how it works, troubleshoot logically BEFORE replacing parts.
    2001 T4 TRAKKA Syncro 2.5TDI,2006 Mk5 2.0TDI Golf manual,2001 Polo 1.4 16V manual [now sold], '09 2.0CR TDI Tiguan manual,
    Numerous Mk1 Golf diesels

  8. #8
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    Quote Originally Posted by jets View Post
    It is called a CV joint. It has precision ground balls & accurate machining in the inside.
    It needs to be fixed ASAP before any water or dust gets inside. It would be like removing the seals on a sealed ball bearing, it wouldn't last very long.
    I think the lay person now knows the right term but i agree it shouldnt be left alone. Lets face it you wouldnt let your gearbox go dry and drive it i hope. Its sealed and lubed for a reason
    cheers
    Jmac
    Alba European
    Service, Diagnostics and repairs. Mobile Diag available on request
    Audi/VW/Porsche Factory trained tech 25+ yrs exp
    For people who value experience call 0423965341

  9. #9
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    Thanks guys, was very minor until doing the VW cruise yesterday... Think my spirited driving on the way back encouraged a lot of the grease to escape...
    I've got a replacement on the way, I'll see if I can use my mechanics shop for this, I can do most of the work but prefer if there is a professional available to oversee or provide assistance.

    Will they have molybdenum grease or would it be supplied with the boot?

  10. #10
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    VW makes a CV boot repair kit for the car. It comes with a pack of grease.

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