CV joints

[lunalupi]

Right, I know there's inner and outer ones.

Can anyone show me (with pictures? ) what they each do - inner ones give suspension movement up-and-down, outer ones give movement side-to-side too?

Also: If I put the Arosa on full lock and move a little, he goes clunk.....is that likely to be the inner or outer joint? I'm already planning to change wishbones and bushes, and whichever cv joint which is going clunk (both sides), but should I do all of them?

 

[Simon Audi]

Hi Lunalupi,

Sorry no pictures, but both compensate for up and down, and the outer compensates for the wheel turning during steering. (as does the inner one slightly)

They are basically flexible joints that allow for radial and axial movement.

Basically they do this via roller bearings and specially shapped housings that allow the joint flexibility.

They are like the flexible coupling on a socket set (only more complicated), two are needed due to the restrained motion from the suspension and to eliminate hysterysis.


A good link for Technical Car Info is below, but I don't think it has anything to explain CV joints.

http://www.carbibles.com/

The click will almost certainly be from the outer joint as that one does most of the work, i.e. it moves further than the inner one.

Just have a look in a Haynes Manual.

Ciao

Simon

 

[Simon Audi]

Hi,

Also look here, this has some pictures and a better explanation.


http://www.samarins.com/glossary/cv_joint.html

I would only change the outers first.

Ciao

Simon

 

[grotmeister]

Hi Luna, here's a picture of a pair of driveshafts of a Mk1, the CV joints work as a pair and allow movement in all dimensions while transferrring power to the wheels in a uniform fashion, hence the name Constant Velocity joints, can imagine new ones will cost a fortune though!
<a href="http://s9.photobucket.com/albums/a98/grotmeister/?action=view&current=driveshafts.jpg" target="_blank"><img src="http://i9.photobucket.com/albums/a98/grotmeister/driveshafts.jpg" border="0" alt="Arosa mk1 driveshafts"></a>

 

[grotmeister]

one day I'll get the hang of this photobucket lark

 

[lunalupi]

Thanks Grotmeister I'd look in a Haynes manual if only the Arosa had one - and I can never remember which year Polo is similar....

Prices aren't *too* horrific....David at SERE says £59 for outer, £64 for inner (SEAT parts), or I can get non-SEAT for £28 outer and £32 inner

 

[ArosaRacer]

i got mine for 28 pounds Nick and theres no difference, your paying for a nice vw box

 

[lunalupi]

I thought that too - was gonna go pretty much for non-SEAT parts I think, except maybe the cambelt and waterpump I need which are the same price (or actually cheaper on exchange) than non-SEAT!

 

[Boo]

Thanks Grotmeister I'd look in a Haynes manual if only the Arosa had one - and I can never remember which year Polo is similar....

Its the Mark 4 one (red one)

 

[lunalupi]

Ooo, thanks Boo *writes down to keep somewhere safe* That's 94-99 right?

Will keep my eyes open for one

 

[Boo]

Ooo, thanks Boo *writes down to keep somewhere safe* That's 94-99 right?

Will keep my eyes open for one

Yup that would be the puppy. I bought mine on ebay for £6 to be fair though with the use I have had out of it I wouldve been more than happy to pay full price for it. Or you could try amazon for a used one.