[Vwdiesel] Re: [Audi-VW-Diesels] valve shims & pliers

[Nate Wall]

This is real odd. The worn side is trhe side opposite the cam? There should be
NO NOTICEABLE wear on this side, and negligable wear on othe other. I do believe
the lifter is supposed to rotate a little, along w/ the shim as the engine runs.
This should even out any wear. Perhaps this is not occurring for some reason.
Like Loren, my only thought is PO gross negligence r.e. oil changes. Perhaps
extremely tight valve clearances at some point could have done it.

In this case, I'd see if the lifters turn freely (cam lobe "UP") and replace the
shims.

--nate

dennis pantazis wrote:

> sorry for my poor writeup.
>
> yes, you could describe it as convex overall, but its not a gradual
> transition like an optical lense (best example i could think of), but much
> more pronounced. kinda like a circular go/no-go feeler, only round.
>
> the best way i can describe it w/o a picture is that the shim that is over
> the end of the valve and keepers is not worn.
> the part that contacts the upper spring seat is noticably worn. there is a
> ridge at the outer edge of the shim. the difference is somewhere between 3-8
> tenths. ie 0.0003- 0.0008. surface finish looks like it was surface ground
>
> does this sound bad? i am inclined to rely on the final result of the gap,
> not the shim. 160K on the odometer.
>
> tia
>
> dennis
>
> ps: the calipers are the like wood turners use, not the measuring kind.